Scorpion Motors

Through improvements in motor design and materials, we have been able to increase the efficiency and power conversion of this motor with an entirely new EM field design, while improving the compatibility with various speed controllers available on the market. This new design motor will deliver even more power to your helicopter, with increased efficiency!

With the new HKII-4525-520kv Ultimate motor, we have once again raised the bar and created a new benchmark for 700-class helicopter power!

Each of the new HKII-4525-520KV ULTIMATE motor is wound with a single strand of 1.4mm wire for the highest possible efficiency. This motor is capable of running continuously at an input power of 4450 watts at 100 amps, and can handle peak inputs of 10200 watts and 230 amps for 2 seconds

Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm lamination to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are custom manufactured to be able to withstand high temperatures, making a motor that is virtually impossible to burn up in

• Stator Diameter - 45 mm
• Stator Thickness - 25 mm
• No. of Stator Arms - 12
• Magnet Poles - 10
• Motor Wind - 5+6T YY
• Motor Kv - 520 KV RPM / Volt
• No-Load Current (IO/8.4v) - 1.75 Amps
• Max pEAK Current - 200A 2SEC
• Max Peak Power - 10200 Watts/ 2 sec
• Weight - 487 Grams
• Outside Diameter - 56,7mm
• Shaft Diameter - 5.98 mm x 55mm
• Body Length - 53,4 mm
• Overall Shaft Length - 114mm
• Max Lipo Cell - 12s

Through improvements in motor design and materials, we have been able to increase the efficiency and power conversion of this motor with an entirely new EM field design, while improving the compatibility with various speed controllers available on the market. This new design motor will deliver even more power to your helicopter, with increased efficiency!

Scorpion HK-2520-1880KV Brushless Motor (3.5mm shaft) is specially made for a use on 450 class electric helicopters running on 6-cell Li-Po power such as WARP 360. This motor is designed to provide all the power that you can use, while still maintaining excellent efficiency and cool running characteristics. The 3.5mm shaft kit which is specialize for the new generation 450 class electric helicopter.

Scorpion HK-Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are custom manufactured to be able to withstand high temperatures, making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    25.0 mm (0.98 in)
• Stator Thickness:    20.0 mm (0.79 in)
• No. of Stator Arms:    12
• Magnet Poles:    10
• Motor Wind:    8 Turn Delta
• Motor Wire:    11-Strand 0.25mm
• Motor Kv:    1880Kv RPM/Volt
• No-Load Current (IO/10V):    2.25 Amps
• Motor Resistance (Rm):    0.026 Ohms
• Max Continuous Current:    38 Amps
• Max Continuous Power:    800 Watts
• Weight :   104 Grams (3.64 oz)
• Outside Diameter :   31.5 mm (1.24 in)
• Shaft Diameter:    3.5 mm (0.14 in)
• Body Length:    39.6 mm (1.56 in)
• Overall Shaft Length :   57.50 mm (2.46 in)
• Max Lipo Cell:    6s
• Max Peak Current:    50A (2 seconds)
• Max Peak Power:    1050 Watts (2 seconds)
• Motor Timing:    5deg
• Drive Frequency:    8kHz

Included in the Box:

• 1 x Scorpion HK-2520-1880KV Motor
• 3 x Female Connectors
• 3 x Heat Shrink
• 4 x M3 Screws

Scorpion HK-2520-3500KV Brushless Motor (3.5mm shaft) is specially designed for 450 class electric helicopters running on 4-cell Li-Po power such as WARP 360. This motor is designed to provide all the power that you can use, while still maintaining excellent efficiency and cool running characteristics. The 3.5mm shaft kit which is specialize for the new generation 450 class electric helicopter.

Scorpion HK-Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm lamination to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are custom manufactured to be able to withstand high temperatures, making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    25.0 mm (0.98 in)
• Stator Thickness:    20.0 mm (0.79 in)
• No. of Stator Arms:    12
• Magnet Poles:    10
• Motor Wind:    3 Turn Delta
• Motor Wire:    21-Strand 0.25mm
• Motor Kv:    3500Kv RPM/Volt
• No-Load Current (IO/10V):    5.80 Amps
• Motor Resistance (Rm):    0.008 Ohms
• Max Continuous Current:    55 Amps
• Max Continuous Power:    770 Watts
• Weight:    104 Grams (3.64 oz)
• Outside Diameter:    31.5 mm (1.24 in)
• Shaft Diameter:    3.5 mm (0.14 in)
• Body Length:    39.6 mm (1.56 in)
• Overall Shaft Length:    57.5 mm (2.26 in)
• Max Lipo Cell:    4s
• Max Peak Current:    75A (2 seconds)
• Max Peak Power:    1050 Watts (2 seconds)
• Motor Timing:    5deg
• Drive Frequency:    8kHz

Included in the Box:

• 1 x Scorpion HK-2520-3500KV Motor
• 3 x Female Connectors
• 3 x Heat Shrink
• 4 x M3 Screw

We introduce the fifth generation of Scorpion's renowned and award winning "HK - Series" motors. The Scorpion "HK5 - Series"

The HK5 Series lives up to and exceeds our standards of the most Powerful and Efficient motors, with market leading Torque per Amp capabilities. In addition, on the HK5 series we focused specifically on motor cooling and motor temperature. With an all new Internal Fan design, combined with our proven external centrifugal fan, we have nearly doubled the amount of airflow passing through the motor. The result is much improved cooling, and cooler operating temperatures.

The HK5-4015-805kv is designed primarily as a lower power option for the SAB RAW 500 helicopter based on the guidelines set forth by SAB Factory directly.

Specifications

Motor Kv 805KV RPM/Volt
Weight 257.8 Grams ( 9.09oz)
Motor Body Dimensions 49.5mm x 45.40mm (1.95" x 1.79")
External Shaft Dimensions 5.98mm x 32mm (0.235" x 1.26")
Continuous Current 60 Amps
Continuous Power 1330 Watts
Peak Current 95A (2 seconds)
Peak Power 2100 Watts (2 seconds)
Max Lipo Cell* 6s
Stator Diameter 40 mm (1.57 in)
Stator Thickness 15 mm (0.59 in)
No. of Stator Arms 12
No. of Stator Poles 10
Motor Wind 7T Delta
Motor Wire 1.18mm
*Higher Cell Count possible with appropriate gear ratio adjustment

Scorpion HK-3226 motors have been developed for the 500 class electric helicopters (425-450mm blade). These motors are designed to provide all the power that you can use, while still maintaining excellent efficiency and cool running characteristics.

Scorpion HK Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold anodized to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts. Unlike other motor manufactures that use off-the-shelf NdFeB magnets with a maximum Curie temperature of 80 to 100 degrees C, our motor magnets are custom manufactured to be able to withstand high temperatures. The wire we use to wind the stators is rated to 180 degrees C (356 F), so it can take the heat and keep on performing.

All Scorpion HK-3226 series motors come with 4mm male Bullet style connectors already attached, and include a hardware package that contains 3 matching female Bullet connectors for your speed controller with matching heat shrink tubing. Since the HK series motors are primarily designed for Helicopter and Ducted Fan use, they do not include a prop adapter. If you intend on running a prop on this motor, you will need to purchase a prop adapter for a 5mm shaft.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

Specifications:

• Stator Diameter:    32.0 mm (1.26 in)
• Stator Thickness:    26.0 mm (1.02 in)
• No. of Stator Arms:    12
• Magnet Poles:    10
• Motor Wind:    5 Turn Delta
• Motor Wire:    28-Strand 0.23mm
• Motor Kv:    1400Kv RPM/Volt
• No-Load Current(Io/10V):    3.89 Amps
• Motor Resistance (Rm):    0.011 Ohms
• Max Continuous Current:   80 Amps
• Max Continuous Power:    1770 Watts
• Weight:    239 Grams (7.77 oz)
• Outside Diameter:    40.9 mm (1.61 in)
• Shaft Diameter:    4.98 mm (0.19 in)
• Body Length:   50.5 mm (1.99 in)
• Overall Shaft Length:    75.5 mm (2.97 in)
• Max Lipo Cell:    6s
• Max Peak Current :   105A (2 seconds)
• Max Peak Power:    2330 Watts (2 seconds)
• Motor Timing:    5deg
• Drive Frequency:    8kHz

Included in the Box:

• 1 x Scorpion HK-3226-1400KV Motor
• 3 x Female Connectors
• 3 x Heat Shrink
• 4 x M4 Screw

The Scorpion HK-4015-1450KV motors have been developed for the 500 class electric helicopters with 425 to 450mm blade for 6s Lipo setup. These motors are designed to provide all the power that you can use, while still maintaining excellent efficiency and cool running characteristics.

Scorpion HK Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold anodized to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

All Scorpion HK-4015 series motors come with 4mm male Bullet style connectors already attached, and include a hardware package that contains 3 matching female Bullet connectors for your speed controller with matching heat shrink tubing. For maximum strength, the Scorpion HK-4015 series motors feature an 6mm motor shaft that is ground down to a 5mm diameter at the output end to fit standard size pinion gears. Since the HK series motors are primarily designed for Helicopter and Ducted Fan use, they do not include a prop adapter. If you intend on running a prop on this motor, you will need to purchase a prop adapter for a 5mm shaft.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    40 mm (1.56 in)
• Stator Thickness:    15 mm (0.59 in)
• No. of Stator Arms:    12
• Magnet Poles:    8
• Motor Wind:    8 Turn Delta
• Motor Wire:    23-Strand 0.29mm
• Motor Kv:    1450KV RPM/Volt
• No-Load Current (IO/10v):    3.16 Amps
• Motor Resistance (RM):    0.009 Ohms
• Max Continuous Current:    80 Amps
• Max Continuous Power:    1770 Watts
• Weight:    244 Grams (8.61 oz)
• Outside Diameter:    48.9 mm (1.9 in)
• Shaft Diameter:    4.98 mm (0.19 in)
• Body Length:    41.5 mm (1.63 in)
• Overall Shaft Length:    73.7 mm (2.9 in)
• Max Lipo Cell:    6s
• Max Peak Current:    110Amps (2sec)
• Max Peak Power:    2440 Watts (2sec)
• Motor Timing:    5deg
• Drive Frequency:    8kHz

Included in the Box:

• 1 x Scorpion HK-4015-1450KV Motor
• 3 x Female Connectors
• 3 x Heat Shrink
• 4 x M3 Screws

Description:

Scorpion HK-3226 motors have been developed for the 500 class electric helicopters (425-450mm blade). These motors are designed to provide all the power that you can use, while still maintaining excellent efficiency and cool running characteristics.

Scorpion HK Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold anodized to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts. Unlike other motor manufactures that use off-the-shelf NdFeB magnets with a maximum Curie temperature of 80 to 100 degrees C, our motor magnets are custom manufactured to be able to withstand high temperatures. The wire we use to wind the stators is rated to 180 degrees C (356 F), so it can take the heat and keep on performing.

All Scorpion HK-3226 series motors come with 4mm male Bullet style connectors already attached, and include a hardware package that contains 3 matching female Bullet connectors for your speed controller with matching heat shrink tubing. Since the HK series motors are primarily designed for Helicopter and Ducted Fan use, they do not include a prop adapter. If you intend on running a prop on this motor, you will need to purchase a prop adapter for a 5mm shaft.

Specifications:

• Stator Diameter: 32.0 mm (1.26 in)
• Stator Thickness: 26.0 mm (1.02 in)
• Motor Kv: 1900Kv RPM/Volt

We introduce the fifth generation of Scorpion's renowned and award winning "HK - Series" motors. The Scorpion "HK5 - Series"

The HK5 Series lives up to and exceeds our standards of the most Powerful and Efficient motors, with market leading Torque per Amp capabilities. In addition, on the HK5 series we focused specifically on motor cooling and motor temperature. With an all new Internal Fan design, combined with our proven external centrifugal fan, we have nearly doubled the amount of airflow passing through the motor. The result is much improved cooling, and cooler operating temperatures.

The HK5-3220-955kv is designed primarily for the SAB RAW 420C helicopter based on the guidelines set forth by SAB Factory directly.

Specifications

Motor Kv 955KV RPM/Volt
Weight 189g Grams ( 6.67oz)
Motor Body Dimensions 40.95mm x 45.98mm (1.61" x 1.81")
External Shaft Dimensions 4.98mm x 22mm (0.235" x 1.26")
Continuous Current 65 Amps
Continuous Power 1500 Watts
Peak Current 90A (2 seconds)
Peak Power 2000 Watts (2 seconds)
Max Lipo Cell* 6s
Stator Diameter 32 mm (1.57 in)
Stator Thickness 20 mm (0.79 in)
No. of Stator Arms 12
No. of Stator Poles 10
Motor Wind 5+6 Turn Delta
Motor Wire 1.05mm

INCLUDED IN THE BOX
1 x HK5-3220 MOTOR
3 x Female 4mm Connectors
3 x Heat Shrink
1 x Hardware / Accessory Pack

We introduce the fifth generation of Scorpion's renowned and award winning "HK - Series" motors. The Scorpion "HK5 - Series"

The HK5 Series lives up to and exceeds our standards of the most Powerful and Efficient motors, with market leading Torque per Amp capabilities. In addition, on the HK5 series we focused specifically on motor cooling and motor temperature. With an all new Internal Fan design, combined with our proven external centrifugal fan, we have nearly doubled the amount of airflow passing through the motor. The result is much improved cooling, and cooler operating temperatures.

The HK5-4020-850kv is designed primarily for the SAB RAW 500 helicopter based on the guidelines set forth by SAB Factory directly.

Specifications
Motor Kv 850KV RPM/Volt
Weight 325.6g Grams ( 11.48oz)
Motor Body Dimensions 49.5mm x 52.00mm (1.95" x 2.05")
External Shaft Dimensions 5.98mm x 32mm (0.235" x 1.26")
Continuous Current 85 Amps
Continuous Power 1900 Watts
Peak Current 120A (2 seconds)
Peak Power 2664 Watts (2 seconds)
Max Lipo Cell* 6s
Stator Diameter 40 mm (1.57 in)
Stator Thickness 20 mm (0.79 in)
No. of Stator Arms 12
No. of Stator Poles 10
Motor Wind 5+5 Turn Delta
Motor Wire 1.4mm
*Higher Cell Count possible with appropriate gear ratio adjustment

From 2010 when Scorpion HKIII-40 series is released, a lot of feedback by World Champions and pilots in all facets of the hobby are received that they have well established themselves as the Gold Standard of R/C model power!

The HKIII-4020 series motors have proven themselves to be extremely successful in heli community, and has become the most popular motor used in 400~500 class helicopters world-wide.

And now we are pleased to announce the release of the forth generation HKIV-4020 series motors. With the same motor design and materials of HKII-45 series, and single strand winding technique on this size of motor, it has the better efficiency and power conversion than HKIII-40 series, with an entirely new EM field design, while improving the compatibility with various speed controllers available on the market. This new design motor will deliver even more power to your helicopter, with increased efficiency!

Specifications

Stator Diameter 40 mm(1.57 in)
Stator Thickness 20 mm(0.79 in)
No. of Stator Arms 12
Magnet Poles 10
Motor Wind 4+4 Turn Delta
Motor Wire 1-Strand 1.6mm
Motor Kv 1060KV RPM/Volt
No-Load Current (IO/10v) 4.03 Amps
Motor Resistance (RM) 0.009 Ohms
Max Continuous Current 78 Amps
Max Continuous Power 1731 Watts
Weight 310 Grams (10.94 oz)
Outside Diameter 49.50 mm (1.95 in)
Shaft Diameter 4.98 mm (0.20 in)
Body Length 49.2 mm (1.94 in)
Overall Shaft Length 80 mm (3.15 in)
Max Lipo Cell 6s
Peak Continuous Current 90 Amps (5 seconds)
Peak Continuous Power 1998 Watts (5 seconds)
Motor Timing 5deg
Drive Frequency 8kHz

The Scorpion "HK5 - Series" : the fifth generation of Scorpion's renowned and award winning MOTOR, 2 SHAFT LENGTHS possible, 6x55mm and 6x36mm

The HK5 Series lives up to and exceeds our standards of the most Powerful and Efficient motors, with market leading Torque per Amp capabilities. In addition, on the HK5 series we focused specifically on motor cooling and motor temperature. With an all new Internal Fan design, combined with our proven external centrifugal fan, we have nearly doubled the amount of airflow passing through the motor. The result is much improved cooling, and cooler operating temperatures.

The HK5-5024-475kv is designed primarily for High Power 700 class helicopters. With the larger Stator Diameter, it provides more torque and more power, for equal weight as compared to the previous HKII-4530-540kv motor.

specifications
Motor Kv 475KV RPM/Volt
Weight 598.0g Grams ( 21.09oz)
Motor Body Dimensions 62.8mm x 61.40mm (2.47" x 2.42")
External Shaft Dimensions 5.98mm x 55mm (0.235" x 2.16")
Continuous Current 120 Amps
Continuous Power 6216 Watts
Peak Current 230A (2 seconds)
Peak Power 12000 Watts (2 seconds)
Max Lipo Cell* 14s
Stator Diameter 50 mm (1.97 in)
Stator Thickness 24 mm (0.94 in)
No. of Stator Arms 12
No. of Stator Poles 10
Motor Wind 5T/6T
Motor Wire 1.6mm
*Higher Cell Count possible with appropriate gear ratio adjustment

The Scorpion "HK5 - Series" : the fifth generation of Scorpion's renowned and award winning MOTOR, 2 SHAFT LENGTHS possible, 6x55mm and 6x36mm

The HK5 Series lives up to and exceeds our standards of the most Powerful and Efficient motors, with market leading Torque per Amp capabilities. In addition, on the HK5 series we focused specifically on motor cooling and motor temperature. With an all new Internal Fan design, combined with our proven external centrifugal fan, we have nearly doubled the amount of airflow passing through the motor. The result is much improved cooling, and cooler operating temperatures.

The HK5-5024-535kv is designed primarily for High Power 700 class helicopters. With the larger Stator Diameter, it provides more torque and more power, for equal weight as compared to the previous HKII-4530-540kv motor.

specifications
Motor Kv 535KV RPM/Volt
Weight 598.0g Grams ( 21.09oz)
Motor Body Dimensions 62.8mm x 61.40mm (2.47" x 2.42")
External Shaft Dimensions 5.98mm x 55mm (0.235" x 2.16")
Continuous Current 130 Amps
Continuous Power 5772 Watts
Peak Current 260A (2 seconds)
Peak Power 11500 Watts (2 seconds)
Max Lipo Cell* 12s
Stator Diameter 50 mm (1.97 in)
Stator Thickness 24 mm (0.94 in)
No. of Stator Arms 12
No. of Stator Poles 10
Motor Wind 5T
Motor Wire 1.6mm
*Higher Cell Count possible with appropriate gear ratio adjustment

Scorpion HK-3536 motors have been developed for the 600 class electric helicopters with narrow motor frame such as Trex-600. These motors are designed to provide all the power that you can use, while still maintaining excellent efficiency and cool running characteristics.

Scorpion HK-Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are custom manufactured to be able to withstand high temperatures, making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    35mm (1.38 in)
• Stator Thickness:    36mm (1.42 in)
• No. of Stator Arms:    12
• Magnet Poles:    10
• Motor Wind:    11 Turn Delta
• Motor Wire:    16-Strand 0.25mm
• Motor Kv:    510Kv RPM/Volt
• No-Load Current(Io/10V):    1.24 Amps
• Motor Resistance (Rm):    0.028 Ohms
• Max Continuous Current:    70 Amps
• Max Continuous Power:    2900 Watts
• Weight:    365 Grams (11.85 oz)
• Outside Diameter:    45.0 mm (11.85 in)
• Shaft Diameter:    5.98 mm (0.24 in)
• Body Length:    61.5 mm (2.42 in)
• Overall Shaft Length:    98.0 mm (3.86 in)
• Max Lipo Cell:    12s
• Max Peak Current :   100 Amps (2 seconds)
• Max Peak Power:    4150 Watts (2 seconds)
• Motor Timing:    5deg
• Drive Frequency:    8kHz

Included in the Box:

• 1 x Scorpion HK-3536-510KV Motor
• 3 x Female Connectors
• 3 x Heat Shrink
• 4 x M3 Screws

We introduce the fifth generation of Scorpion's renowned and award winning "HK - Series" motors. The Scorpion "HK5 - Series"

The HK5 Series lives up to and exceeds our standards of the most Powerful and Efficient motors, with market leading Torque per Amp capabilities. In addition, on the HK5 series we focused specifically on motor cooling and motor temperature. With an all new Internal Fan design, combined with our proven external centrifugal fan, we have nearly doubled the amount of airflow passing through the motor. The result is much improved cooling, and cooler operating temperatures.

Specifications , this motor used on Mikado helis mostly

Motor Kv 1115KV RPM/Volt
Weight 367.7.0 Grams ( 12.97oz)
Motor Body Dimensions 49.5mm x 57.30mm (1.95" x 2.25")
External Shaft Dimensions 6mm x 32mm (0.235" x 1.42")
Continuous Current 135 Amps
Continuous Power 2775 Watts
Peak Current 180A (2 seconds)
Peak Power 4050 Watts (2 seconds)
Max Lipo Cell* 6s
Stator Diameter 40 mm (1.57 in)
Stator Thickness 26 mm (1.02 in)
No. of Stator Arms 12
No. of Stator Poles 10
Motor Wind 3T Delta
Motor Wire 1.7mm

We introduce the fifth generation of Scorpion's renowned and award winning "HK - Series" motors. The Scorpion "HK5 - Series"

The HK5 Series lives up to and exceeds our standards of the most Powerful and Efficient motors, with market leading Torque per Amp capabilities. In addition, on the HK5 series we focused specifically on motor cooling and motor temperature. With an all new Internal Fan design, combined with our proven external centrifugal fan, we have nearly doubled the amount of airflow passing through the motor. The result is much improved cooling, and cooler operating temperatures.

Specifications

Motor Kv 1115KV RPM/Volt
Weight 367.7.0 Grams ( 12.97oz)
Motor Body Dimensions 49.5mm x 57.30mm (1.95" x 2.25")
External Shaft Dimensions 5.98mm x 36mm (0.235" x 1.42")
Continuous Current 135 Amps
Continuous Power 2775 Watts
Peak Current 180A (2 seconds)
Peak Power 4050 Watts (2 seconds)
Max Lipo Cell* 6s
Stator Diameter 40 mm (1.57 in)
Stator Thickness 26 mm (1.02 in)
No. of Stator Arms 12
No. of Stator Poles 10
Motor Wind 3T Delta
Motor Wire 1.7mm

We introduce the fifth generation of Scorpion's renowned and award winning "HK - Series" motors. The Scorpion "HK5 - Series"

The HK5 Series lives up to and exceeds our standards of the most Powerful and Efficient motors, with market leading Torque per Amp capabilities. In addition, on the HK5 series we focused specifically on motor cooling and motor temperature. With an all new Internal Fan design, combined with our proven external centrifugal fan, we have nearly doubled the amount of airflow passing through the motor. The result is much improved cooling, and cooler operating temperatures.

Specifications

Motor Kv 815KV RPM/Volt
Weight 367.7.0 Grams ( 12.97oz)
Motor Body Dimensions 49.5mm x 57.30mm (1.95" x 2.25")
External Shaft Dimensions 5.98mm x 36mm (0.235" x 1.42")
Continuous Current 100 Amps
Continuous Power 3000 Watts
Peak Current 135A (2 seconds)
Peak Power 4050 Watts (2 seconds)
Max Lipo Cell* 8s
Stator Diameter 40 mm (1.57 in)
Stator Thickness 26 mm (1.02 in)
No. of Stator Arms 12
No. of Stator Poles 10
Motor Wind 4T Delta
Motor Wire 1.6mm

Scorpion HKII-4225-500KV Brushless Motor Limited Edition is specially designed for a use on 600 class or light 700 class helicopters running on 12-cell Li-Po power. This motor represents the most technologically advanced power source ever offered for a 600 class electric helicopter. Each of the new HKII-4225 Limited Edition motor is wound with a single strand of 1.3mm wire for the highest possible efficiency. This motor is capable of running continuously at an input power of 3550 watts at 80 amps, and can handle peak inputs of 5770 watts and 130 amps.

Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Plated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    42 mm (1.65 in)
• Stator Thickness:    25 mm (0.98 in)
• No. of Stator Arms:    12
• No. of Stator Poles:    10
• Motor Wind:    12 Turn Delta
• Motor Wire:    1-Strand 1.3 mm
• Motor Kv:    500KV RPM/Volt
• No-Load Current (Io/10V):    1.62 Amps
• Motor Resistance (RM) :   0.018 Ohms
• Max Continuous Current:    80 Amps
• Max Continuous Power:    3550 Watts
• Weight:    393 Grams (13.77 oz)
• Outside Diameter:    52.3 mm (2.06 in)
• Shaft Diameter:    5.98 mm (0.24 in)
• Body Length:    51.50 mm (2.03 in)
• Overall Shaft Length:    91.5 mm (3.60 in)
• Max Lipo Cell:    12s
• Max Peak Current:    130 Amps (5 seconds)
• Max Peak Power:    5770 Watts (5 seconds)
• Motor Timing:    5deg
• Drive Frequency:    8kHz

Included in the Box:

• HKII-4225-500Kv Motor
• 3x Female Connectors
• 3x Heat Shrink

Note:

• *This motor is using 30mm bolt spacing on the mounting

Scorpion HKIII-4225-610KV Brushless Motor Limited Edition is specially designed for a use on 600 class helicopters running on 12-cell Li-Po power. This motor represents the most technologically advanced power source ever offered for a 600 class electric helicopter. Each of the new HKII-4225 Limited Edition motor is wound with a single strand of 1.4mm wire for the highest possible efficiency. This motor is capable of running continuously at an input power of 3550 watts at 80 amps, and can handle peak inputs of 5770 watts and 130 amps.

Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Plated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    42 mm (1.65 in)
• Stator Thickness:    25 mm (0.98 in)
• No. of Stator Arms:    12
• No. of Stator Poles:    10
• Motor Wind:    10 Turn Delta
• Motor Wire:    1-Strand 1.4 mm
• Motor Kv :   610KV RPM/Volt
• No-Load Current (Io/10V):    2.33 Amps
• Motor Resistance (RM):    0.013 Ohms
• Max Continuous Current:    80 Amps
• Max Continuous Power:    3550 Watts
• Weight :   393 Grams (13.77 oz)
• Outside Diameter:    52.3 mm (2.06 in)
• Shaft Diameter:    5.98 mm (0.24 in)
• Body Length:    51.50 mm (2.03 in)
• Overall Shaft Length:   91.5 mm (3.60 in)
• Max Lipo Cell:    12s
• Max Peak Current:    130 Amps (5 seconds)
• Max Peak Power:    5770 Watts (5 seconds)
• Motor Timing:    5deg
• Drive Frequency:    8kHz

Note:

• *This motor is using 30mm bolt spacing on the mounting
• * Gold connectors are not soldered nor included

replaced by HK5-4026-1115

The HKIII-4025 series motors have proven themselves to be extremely successful in heli community and has become the most popular motor used in 500~600 class helicopters world-wide.

And now we are pleased to announce the release of the fourth generation HKIV-4025 series motors. With the same motor design and materials of HKII-45 series, and single strand winding technique on this size of motor, it has the better efficiency and power conversion than HKIII-40 series, with an entirely new EM field design, while improving the compatibility with various speed controllers available on the market. This new design motor will deliver even more power to your helicopter, with increased efficiency!

Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm lamination to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are custom manufactured to be able to withstand high temperatures, making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    40 mm(1.57 in)
• Stator Thickness :   25 mm(0.98 in)
• No. of Stator Arms:    12
• Magnet Poles:    10
• Motor Wind:    6T77T Delta
• Motor Wire:    1 STRAND 1.2MM
• Motor Kv:    520KV RPM/Volt
• No-Load Current (IO/10v):   1.81 AMP
• Motor Resistance (RM):    0.023 Ohms
• Max Continuous Current:    65 Amps
• Max Continuous Power:    2886 Watts
• Weight :   347 Grams (10.79 oz)
• Outside Diameter:    49.98 mm (1.97 in)
• Shaft Diameter:    5.98 mm (0.24 in)
• Body Length :   51.8 mm (2.04 in)
• Overall Shaft Length:    83.7 mm (3.30 in)
• Max Lipo Cell:   12s
• Peak Current :   90 Amps (5 seconds)
• Peak Continuous Power:    3996 Watts (5 seconds)
• Motor Timing:    5deg
• Drive Frequency:    8kHz

Included in the Box:

• 1 x Scorpion HKIV-4025-520KV Motor
• 3 x Female Connectors
• 3 x Connector Cover
• 4 x M3 Screws
• 4 x M4 Screws

With the trend of ultra light weight 700 size models on the rise, the market called for a light weight, yet ultra powerful motor. So Scorpion brought back the HKII-4225-550kv for a Limited Edition run! Sized directly between our proven HKIV-4025 and HKII-4525 motors in terms of weight and power, and LIGHTER yet MORE powerful then our competitors 4030 motors, this motor represents the most technologically advanced power source ever offered for an electric helicopter. Each of the new HKII-4225 Limited Edition motor is hand wound with a single strand of 1.35mm wire for the highest possible efficiency. This motor is capable of running continuously at an input power of 3550 watts at 80 amps, and can handle peak inputs of 5770 watts and 130 amps. Perfect for a Light weight 700 size, or monster 600 size power system on 12s.

Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Plated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 1-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 1-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter

• Stator Diameter 42 mm (1.65 in)
• Stator Thickness 25 mm (0.98 in)
• No. of Stator Arms 12
• No. of Stator Poles 10
• Motor Wind 10 Turn Delta
• Motor Wire 1-Strand 1.35 mm
• Motor Kv 550KV RPM/Volt
• No-Load Current (Io/10V) 1.77 Amps
• Motor Resistance (RM) 0.016 Ohms
• Max Continuous Current 80 Amps
• Max Continuous Power 3550 Watts
• Weight 393 Grams (13.77 oz)

Scorpion HKIII-5025-440KV Brushless Motor is mainly designed for 700 size helicopters  and also for people that want to convert their .90 size glow helicopter to electric power. This motor has a maximum continuous power rating of 4200 watts at 95 amps, and a peak power rating of 5700 watts at 130 amps! The larger diameter 50mm stator allows these motors to produce insane amounts of torque.

Scorpion HK Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold anodized to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    50 mm (1.56 in)
• Stator Thickness:    25 mm (0.79 in)
• No. of Stator Arms:    12
• Magnet Poles:    10
• Motor Wind:    12 Turn Delta
• Motor Wire:    19-Strand 0.33 mm
• Motor Kv:    440KV RPM / Volt
• No-Load Current (Io/10V):    1.15 Amps
• Motor Resistance (Rm):    0.015 Ohms
• Max Continuous Current:    95 Amps
• Max Continuous Power:    4200 Watts
• Weight:    566 Grams (19.96 oz)
• Outside Diameter:    62.1 mm (2.44 in)
• Shaft Diameter:    5.98 mm (0.24 in)
• Body Length:    58.7 mm (2.31 in)
• Overall Shaft Length:    104.30 mm (4.11 in)
• Max Lipo Cell:    14s
• Peak Current:    120A (5 seconds)
• Peal Power:    5320 Watts (5 seconds)
• Motor Timing :   5deg
• Drive Frequency:    8kHz

Scorpion HKIII-5020-450KV Brushless Motor is designed for 700 class Electric Helicopters, and for people that want to convert their 90 size glow helicopter to electric power. This motor has a maximum continuous power rating of 3770 watts at 85 amps, and a peak power rating of 5320 watts at 120 amps! The larger diameter 50mm stator allows these motors to produce insane amounts of torque.

Scorpion HK Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold anodized to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    50 mm (1.56 in)
• Stator Thickness:    20 mm (0.79 in)
• No. of Stator Arms:    12
• Magnet Poles:    10
• Motor Wind:    14 Turn Delta
• Motor Wire:    16-Strand 0.33 mm
• Motor Kv:    450KV RPM / Volt
• No-Load Current (Io/10V):    1.31 Amps
• Motor Resistance (Rm):    0.017 Ohms
• Max Continuous Current:    85 Amps
• Max Continuous Power:    3770 Watts
• Weight:    501 Grams (17.67 oz)
• Outside Diameter:    62.1 mm (2.44 in)
• Shaft Diameter:    5.98 mm (0.24 in)
• Body Length:    53.7 mm (2.11 in)
• Overall Shaft Length:    98.30 mm (3.87 in)
• Max Lipo Cell:    12s
• Peak Current:    120A (5 seconds)
• Peal Power:    5320 Watts (5 seconds)
• Motor Timing:    5deg
• Drive Frequency:    8kH

Scorpion HKIII-5020-520KV Brushless Motor is designed for 700 class Electric Helicopters, and for people that want to convert their .90 size glow helicopter to electric power. This motor has a maximum continuous power rating of 3770 watts at 85 amps, and a peak power rating of 5320 watts at 120 amps! The larger diameter 50mm stator allows these motors to produce insane amounts of torque.

Scorpion HK Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold anodized to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    50 mm (1.56 in)
• Stator Thickness:    20 mm (0.79 in)
• No. of Stator Arms:    12
• Magnet Poles:    10
• Motor Wind :   13 Turn Delta
• Motor Wire:    19-Strand 0.33 mm
• Motor Kv:    520KV RPM / Volt
• No-Load Current (Io/10V):    1.26 Amps
• Motor Resistance (Rm):    0.014 Ohms
• Max Continuous Current:    90 Amps
• Max Continuous Power:    4000 Watts
• Weight:    498 Grams (17.56 oz)
• Outside Diameter:    62.1 mm (2.44 in)
• Shaft Diameter:    5.98 mm (0.24 in)
• Body Length:    53.7 mm (2.11 in)
• Overall Shaft Length:    98.30 mm (3.87 in)
• Max Lipo Cell:    12s
• Peak Current :   120A (5 seconds)
• Peal Power:    5320 Watts (5 seconds)
• Motor Timing:    5deg
• Drive Frequency:    8kHz

With the same motor design and materials of HKII-45 series, and single strand winding technique on this size of motor, it has the better efficiency and power conversion than HKIII-40 series, with an entirely new EM field design, while improving the compatibility with various speed controllers available on the market. This new design motor will deliver even more power to your helicopter, with increased efficiency!

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    40 mm (1.57 in)
• Stator Thickness:    35 mm (1.024 in)
• No. of Stator Arms:    12
• Magnet Poles:    10
• Motor Wind:  5+6 2Y
• Motor Wire:    1-Strand 1.35mm
• Motor Kv:    520KV RPM / Volt
• No-Load Current (IO):    2.1 Amps @ 10v
• Motor Resistance (RM):    0.016 Ohms
• Max Continuous Current:    84 Amps
• Max Continuous Power:    3729 Watts
• Weight:    456 Grams
• Outside Diameter:    49.5 mm
• Shaft Diameter:    5.98 mm (0.235 in)
• Body Length:    64 mm
  
• Overall Shaft Length:   102.4mm
• Max Lipo Cell:    12s
• Peak Current:    104A (5 seconds)
• Peak Power:    4617 Watts (5 seconds)
• Motor Timing:    5deg
• Drive Frequency:    8kHz

Included:
1 x Scorpion HKIV-4035-500KV Motor
3 x Female Connectors
3 x Connector Cover
4 x M4 Screws

Scorpion HK-4530-450KV Brushless Motor Limited Edition is specially designed for a use on 700 class helicopters running on 14-cell Li-Po power. This motor represents the most technologically advanced power source ever offered for a 700 class electric helicopter and also produces 20% more torque than the Scorpion popular HKIII-4035 series motors and exceed 90% efficiency.

Each of the new HK-4530-450KV Limited Edition motor is wound with a single strand of 1.4mm wire for the highest possible efficiency. This motor is capable of running continuously at an input power of 5400 watts at 110 amps, and can handle peak inputs of 9600 watts and 200 amps for 2 seconds.

Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are custom manufactured to be able to withstand high temperatures, making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    45 mm (1.77 in)
• Stator Thickness:    30 mm (1.18 in)
• No. of Stator Arms:    12
• No. of Stator Poles:    10
• Motor Wind:    6T+5T in double Wye
• Motor Wire:    1-Strand 1.4 mm
• Motor Kv:    450KV RPM/Volt
• No-Load Current (Io/10V):    1.71 Amps
• Motor Resistance (RM):    0.0130 Ohms
• Max Continuous Current:    110 Amps
• Max Continuous Power:    5400 Watts
• Weight:    565 Grams (17.25 oz)
• Outside Diameter:    56.7 mm (2.23 in)
• Shaft Diameter:    5.98 mm (0.24 in)
• Body Length :   60.6 mm (2.39 in)
• Overall Shaft Length:    100.0 mm (3.94 in)
• Max Lipo Cell:    14s (for Best Setup)
• Max Peak Current:    200A (2 seconds)
• Max Peak Power:    9600 Watts (2 seconds)
• Motor Timing:    5deg to 15deg
• Drive Frequency:    8kHz

Included in the Box:

• 1 x Scorpion HK-4530-450KV Motor
• 3x Female 6mm Connectors
• 3x Heat Shrink  

Note:

• *This motor is using 30mm bolt spacing on the mounting with M4 Screw holes

Scorpion HK-4530-500KV 6mm shaft Brushless Motor Limited Edition is specially designed for a use  on 700 class helicopters running on 12-cell Li-Po power. This motor represents the most technologically advanced power source ever offered for a 700 class electric helicopter and also produces 20% more torque than the Scorpion popular HKIII-4035 series motors and exceed 89% efficiency.

Each of the new HK-4530-500KV Limited Edition motor is wound with a single strand of 1.5mm wire for the highest possible efficiency. This motor is capable of running continuously at an input power of 4800 watts at 115 amps, and can handle peak inputs of 11000 watts and 250 amps for 2 seconds.

Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are custom manufactured to be able to withstand high temperatures, making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    45 mm (1.77 in)
• Stator Thickness:    30 mm (1.18 in)
• No. of Stator Arms:    12
• No. of Stator Poles:    10
• Motor Wind:    5T+5T Turn Wye
• Motor Wire:    1-Strand 1.5 mm
• Motor Kv:    500KV RPM/Volt
• No-Load Current (Io/10V):    1.85 Amps
• Motor Resistance (RM):    0.0107 Ohms
• Max Continuous Current:    115 Amps
• Max Continuous Power:    4800 Watts
• Weight :   565 Grams (17.25 oz)
• Outside Diameter:    56.7 mm (2.23 in)
• Shaft Diameter:   6mm
• Body Length:    60.6 mm (2.39 in)
• Overall Shaft Length:    112mm
• Max Lipo Cell:    12s
• Max Peak Current:    250A (2 seconds)
• Max Peak Power:    11000 Watts (2 seconds)
• Motor Timing:    5deg to 15 deg
• Drive Frequency:    8kHz

Included in the Box:

1 x Scorpion HK-4530-500KV 6mm XL Shaft Motor
3 x Female Connectors
3 x Heat Shrink

Scorpion HKII-4530-500KV 6mm shaft Brushless Motor is specially designed for a use  on 700 class helicopters running on 12-cell Li-Po power. This motor represents the most technologically advanced power source ever offered for a 700 class electric helicopter and also produces 20% more torque than the Scorpion popular HKIII-4035 series motors and exceed 89% efficiency.

Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are custom manufactured to be able to withstand high temperatures, making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

Stator Diameter 45 mm (1.77 in)
Stator Thickness 30 mm (1.18 in)
No. of Stator Arms 12
No. of Stator Poles 10
Motor Wind 5T+5T Turn Wye
Motor Wire 1-Strand 1.5 mm
Motor Kv 500KV RPM/Volt
No-Load Current (Io/10V) 2.12 Amps
Motor Resistance (RM) 0.012 Ohms
Max Continuous Current 115 Amps
Max Continuous Power 4800 Watts
Weight 598 Grams (21.09 oz)
Outside Diameter 56.9 mm (2.24 in)
Shaft Diameter 5.98 mm (0.24 in)
Body Length 62.3 mm (2.45 in)
Overall Shaft Length 117.3 mm (4.62 in)
Max Lipo Cell 12s
Max Peak Current 250A (2 seconds)
Max Peak Power 11000 Watts (2 seconds)
Motor Timing 5deg to 15 deg
Drive Frequency 8kHz

Included in the Box:

1 x Scorpion HK-4530-500KV 6mm XL Shaft Motor
3 x Female Connectors
3 x Heat Shrink

Scorpion HKII-4530-540KV Brushless Motor Limited Edition is specially designed for a use on 700 class helicopters running on 12-cell Li-Po power. This motor represents the most technologically advanced power source ever offered for a 700 class electric helicopter and also produces 20% more torque than the Scorpion popular HK4035 series motors and exceed 89% efficiency.

Each of the new HKII-4530-540KV Limited Edition motor is wound with a single strand of 1.5mm wire for the highest possible efficiency. This motor is capable of running continuously at an input power of 4800 watts at 115 amps, and can handle peak inputs of 11000 watts and 250 amps for 2 seconds.

Scorpion Competition Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold Electro-Coated to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are custom manufactured to be able to withstand high temperatures, making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications

Stator Diameter 45 mm (1.77 in)
Stator Thickness 30 mm (1.18 in)
No. of Stator Arms 12
No. of Stator Poles 10
Motor Wind 5T+4T Turn Wye
Motor Wire 1-Strand 1.5 mm
Motor Kv 540KV RPM/Volt
No-Load Current (Io/10V) 2.54 Amps
Motor Resistance (RM) 0.010 Ohms
Max Continuous Current 115 Amps
Max Continuous Power 4800 Watts
Weight 588 Grams (20.74 oz)
Outside Diameter 56.9 mm (2.24 in)
Shaft Diameter 5.98 mm (0.24 in)
Body Length 62.3 mm (2.45 in)
Overall Shaft Length 117.3 mm (4.62 in)
Max Lipo Cell 12s
Max Peak Current 250A (2 seconds)
Max Peak Power 11000 Watts (2 seconds)
Motor Timing 5deg to 15 deg
Drive Frequency 8kHz

From 2010 when Scorpion HKIII-40 series is released, a lot of feedback by World Champions and pilots in all facets of the hobby are received that they have well established themselves as the Gold Standard of R/C model power!

The HKIII-4035 series motors have proven themselves to be extremely successful in heli community and has become the most popular motor used in 600 ~ 700 class helicopters world-wide.

And now we are pleased to announce the release of the fourth generation HKIV-4035 series motors. With the same motor design and materials of HKII-45 series, and single strand winding technique on this size of motor, it has the better efficiency and power conversion than HKIII-40 series, with an entirely new EM field design, while improving the compatibility with various speed controllers available on the market. This new design motor will deliver even more power to your helicopter, with increased efficiency!

Specifications
Stator Diameter 40 mm (1.57 in)
Stator Thickness 35 mm (1.024 in)
No. of Stator Arms 12
Magnet Poles 10
Motor Wind 5+6 Turn Delta
Motor Wire 1-Strand 1.35mm
Motor Kv 450KV RPM / Volt
No-Load Current (IO/10v) 2.22 Amps @ 10v
Motor Resistance (RM) 0.019 Ohms
Max Continuous Current 75 Amps
Max Continuous Power 3330 Watts
Weight 456 Grams (16.09 oz)
Outside Diameter 49.5 mm (1.95 in)
Shaft Diameter 5.98 mm (0.235 in)
Body Length 64 mm (2.52 in)
Overall Shaft Length 102.4 mm (4.03 in)
Max Lipo Cell 12s
Peak Continuous Current 95A (5 seconds)
Peak Continuous Power 4218 Watts (5 seconds)
Motor Timing 5deg
Drive Frequency 8kH
Included in the Box
1 x Scorpion HKIV-4035-450KV Motor
3 x Female Connectors
3 x Connector Cover
4 x M4 Screws

From 2010 when Scorpion HKIII-40 series is released, a lot of feedback by World Champions and pilots in all facets of the hobby are received that they have well established themselves as the Gold Standard of R/C model power!

The HKIII-4035 series motors have proven themselves to be extremely successful in heli community and has become the most popular motor used in 600 ~ 700 class helicopters world-wide.

And now we are pleased to announce the release of the fourth generation HKIV-4035 series motors. With the same motor design and materials of HKII-45 series, and single strand winding technique on this size of motor, it has the better efficiency and power conversion than HKIII-40 series, with an entirely new EM field design, while improving the compatibility with various speed controllers available on the market. This new design motor will deliver even more power to your helicopter, with increased efficiency!

Specifications

• Stator Diameter    40 mm (1.57 in)
• Stator Thickness    35 mm (1.024 in)
• No. of Stator Arms    12
• Magnet Poles    10
• Motor Wind    4+5Turn Delta
• Motor Wire    1-Strand 1.5mm
• Motor Kv    560KV RPM / Volt
• No-Load Current (IO/10v)    2.81 Amps @ 10v
• Motor Resistance (RM)    0.013 Ohms
• Max Continuous Current    100 Amps
• Max Continuous Power    4440 Watts
• Weight    456 Grams (16.09 oz)
• Outside Diameter    49.5 mm (1.95 in)
• Shaft Diameter    5.98 mm (0.235 in)
• Body Length    64 mm (2.52 in)
• Overall Shaft Length    102.4 mm (4.03 in)
• Max Lipo Cell    12s
• Peak Continuous Current    120A (5 seconds)
• Peak Continuous Power    5328 Watts (5 seconds)
• Motor Timing    5deg
• Drive Frequency    8kHz

Included in the Box

• 1 x Scorpion HKIV-4035-560KV Motor
• 3 x Female Connectors
• 3 x Connector Cover
• 4 x M4 Screws

We introduce the fifth generation of Scorpion's renowned and award winning "HK - Series" motors. The Scorpion "HK5 - Series"

The HK5 Series lives up to and exceeds our standards of the most Powerful and Efficient motors, with market leading Torque per Amp capabilities. In addition, on the HK5 series we focused specifically on motor cooling and motor temperature. With an all new Internal Fan design, combined with our proven external centrifugal fan, we have nearly doubled the amount of airflow passing through the motor. The result is much improved cooling, and cooler operating temperatures.

The HK5-4525-535kv is designed for 700 size helicopters on 12s lipo, or other UAV application requiring up to 10,200w of power.

Specifications

Motor Kv	535KV RPM/Volt
Weight	532 Grams ( 18.76oz)
Motor Body Dimensions	57.5 mm x 61.5mm (2.26" x 2.42")
External Shaft Dimensions	5.98mm x 36mm (0.235" x 1.41")
Continuous Current	115 Amps
Continuous Power	5106 Watts
Peak Current	230A (2 seconds)
Peak Power	10200 Watts (2 seconds)
Max Lipo Cell	12s
Stator Diameter	45 mm (1.57 in)
Stator Thickness	25 mm (1.18 in)
No. of Stator Arms	12
No. of Stator Poles	10
Motor Wind	5+6T YY
Motor Wire	1.4mm

The Scorpion HK-5035-500 motor will provide all the power you need for the larger 800 class electric helicopters, those massive electric powered scale projects or for your workhorse camera platform helicopters that need to be able to lift heavy weights reliably.

Scorpion HK Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold anodized to provide a beautiful, long-lasting finish. The stators are made with 0.2mm laminations to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

• Stator Diameter:    50 mm (1.56 in)
• Stator Thickness:    35 mm (1.37 in)
• No. of Stator Arms:    12
• Magnet Poles:    8
• Motor Wind:    9 Turn Delta
• Motor Wire:    26-Strand 0.33 mm
• Motor Kv:    500KV RPM / Volt
• No-Load Current (Io/10V):    1.03 Amps
• Motor Resistance (Rm):    0.012 Ohms
• Max Continuous Current :   120 Amps
• Max Continuous Power:    5400 Watts
• Weight:    670 Grams (23.45 oz)
• Outside Diameter:    61.0 mm (2.4 in)
• Shaft Diameter:    7.98 mm (0.3 in)
• Body Length:    66.0 mm (2.59 in)
• Overall Shaft Length:    100.75 mm (3.97 in)
• Max Lipo Cell:    12s
• Peak Current :   160A (5 seconds)
• Peal Power:    7100 Watts (5 seconds)

Scorpion HKIII-5035-380KV Brushless Motor will provide all the power you need for the larger 800 class electric helicopters, those massive electric powered scale projects or for your workhorse camera platform helicopters that need to be able to lift heavy weights reliably.

Scorpion HK Series Brushless Motors are built from the best materials available, and are designed to provide both quality and performance at an affordable price. Scorpion starts with high quality aluminum alloy parts that are produced on the latest CNC milling machines. These parts are then gold anodized to provide a beautiful, long-lasting finish. The stators are made with high quality lamination's to give maximum efficiency, and minimum Eddy current losses. The stators are epoxy coated to prevent shorts, and are wound with wire that is rated at 180 degrees C (356 F). The magnets used in Scorpion Motors are rated for operation at 200 degrees C (392 F), making a motor that is virtually impossible to burn up in normal use.

Scorpion Motors are built to last, and are backed with a 2-Year warranty against defects in materials or workmanship. However, due to the high RPM of these motors, and the fact that we cannot control the installation and setup, the bearings are not covered by the 2-Year warranty, nor is any subsequent damage caused to the motor by a bearing failure. Bearings are a normal wear item, and as such, need to be maintained and changed periodically. For maximum life, make sure that a sufficient gap is left between the pinion and main gear during motor installation to avoid binding, and put a small drop of oil on each bearing every 5-6 flights. It is the responsibility of the pilot to ensure that the bearings are maintained properly.

For the best overall combination of quality, performance, and value, use Scorpion Motors in your helicopter!

Specifications:

Stator Diameter 50 mm (1.56 in)
Stator Thickness 35 mm (1.38 in)
No. of Stator Arms 12
Magnet Poles 10
Motor Wind 5+5 Turn Delta
Motor Wire 1-Strand 1.6 mm
Motor Kv 380KV RPM / Volt
No-Load Current (Io/10V) 2.9 Amps
Motor Resistance (Rm) 0.0161 Ohms
Max Continuous Current 99 Amps
Max Continuous Power 5128 Watts
Weight 785 Grams (27.67 oz)
Outside Diameter 62.2 mm (2.45 in)
Shaft Diameter 7.98 mm (0.31 in)
Body Length 69.2 mm (2.73 in)
Overall Shaft Length 124.80 mm (4.91 in)
Max Lipo Cell 14s
Max Peak Current 137 A (5 seconds)
Max Peak Power 7097 Watts (5 seconds)
Motor Timing 5deg
Drive Frequency 8kHz

The Scorpion A - Series line of motors was designed to be the most optimal and premier choice of motor for your freestyle or UAV airplane. We have achieved incredible performance through incredible efficiency. By optimizing the magnets in the rotor, and using the best quality 0.2mm thickness silicon steel stator sheets, and single strand enamel coated copper wire windings rated above 200C+, the performance and efficiency results are unlike anything we have seen before! Combined with a robust design which has been tested extensively by our world class team pilots for longevity and reliability, we feel this motor checks and exceeds all measurable categories!

The A-7445 was designed specifically for airplanes requiring a 150cc - 170cc equivalent gas engine, or other airframes requiring up to 10,000w of power.

Recommended Prop Selection :

For 12s - 30x12C2E - 33x10C2E = 150cc performance

For 14s - 28x12C2E - 30x12 C2E = 150cc performance

Recommended ESC -: Tribunus II 14-300A ESC SBEC

NOTE: Due to the large size of airframes in this class, normally the battery wires must be extended. Running to long of battery cables WILL damage ESC and void your warranty.
Precautions must be taken. We recommend the use of an additional capacitor bank such as the APD 100V 800uF.

Acrobatic Weight Range -: 15.0kg - 25.0kg - kg (33.0lbs - 55.0lbs)

Sport / UAV (single engine) Weight Range : - 21.5kg - 64kg (47.4lbs -142.0lbs)

Specifications

Motor Kv 140 RPM / Volt
Weight (Motor only) 1688g (59.54 oz)
Weight (including prop mount accessories) 1808g (63.77 oz)
Motor Body Dimensions 86.80 mm x 85.30mm (3.42" x 3.36")
External Shaft Diameter 10mm
Continuous Current 136A
Continuous Power 7100 Watts
Peak Current* 192A
Peak Power* 10000 Watts
Max Rated Lipo Cell** 12s - 14s
Stator Diameter 74.0 mm (2.91 in)
Stator Thickness 45 mm (1.77 in)
No. of Stator Arms 24
Magnet Poles 28
Motor Wind 5T/6T 4Y
Motor Wire 1.25mm