OmpHobby Nimbus 550 kit with standard servos

A builder’s kit of a high-performance 550 class 3D helicopter with 120° CCPM swashplate and flybarless main rotor for 520–570 mm blades for 4020–4035 brushless motor and 6–12S LiPo. Contents: a complete set of the mechanic/airframe parts (holders for cyclic standard servos) and manual; not included: brushless motor, electronic equipment, main and tail rotor blades.

The Nimbus 550 is a high-performance 550 class electric-powered RC helicopter that can adopt a wide range of brushless motors and electronics; therefore - either „straight out of the box“ or with optional parts added - it will meet the requirements of a beginner pilot as well as a seasoned 3D pilot and it is ready to work with their favourite and well-tested equipment.

The heart of this RC model helicopter features a single-piece 7075 aluminium bearing block and servo mounting assembly. This provides excellent rigidity and strength to the carbon fibre frame and drive train. Small but important details like main shaft bearings which feature double-row angular contact bearings boost durability and provide long service life.

120° CCPM swash plate is controlled by three standard-size servos and a high-precision linkage system. (Using an optional set, the cyclic control could be converted to mini-size servos.) This converts to a mechanical set-up that reduces control interaction as much as possible. The main grip arms are designed to bend or break in a crash in order to prevent damage to other (more expensive) parts of the helicopter.

The frame of the helicopter is built with 2.5 mm thick carbon fibre frames for the upper portion and a 2 mm carbon frame for the lower portions providing unmatched frame strength and durability without adding unnecessary weight.

The Nimbus 550 battery tray can be loaded from the front or rear, which will allow you to power up the helicopter without removing the canopy.

Using the corresponding motor and ESC, the Nimbus 550 could be flown on flight batteries with 6S, 8S, 10S or even 12S LiPo cells.

The robust main rotor head allows for the installation of 515–570 mm blades; you could go up to 620 mm with an optional upgrade set.

The tail boom does not need boom supports thanks to a strong 27 mm diameter carbon tube. The tail gearbox is installed in a one-piece aluminium case for easy assembly and maintenance.

NIMBUS 550 V2 (STD) Features:

• Flybarless main rotor head
• 120° CCPM swash plate
• Rigid airframe with carbon sides (2.5mm upper part, 2.0mm lower part)
• Extra rigid 27mm carbon tube tail boom
• For 11-13T pinions (5 or 6mm motor shaft); 12T pinion in the kit
• Main gear 106T, autorotation pulley 60T, tail pulley 13T
• Suitable for 515–570mm main rotor blades
• 6 mm wide tail belt
• Suitable for 80–95mm tail rotor blades
• Front/Rear load battery tray
• Accepts 6-12S LiPo flight packs
• Sleek sporty canopy
• Durable undercarriage

Recommended main rotor blades: 520–570 mm carbon.
Recommended tail rotor blades: 80–95 mm carbon.
Recommended RC set: At least 6-channel computer transmitter w. heli program.
Recommended cyclic servos: Standard size
Recommended tail servo: Standard size
Flybarless control unit: Futaba CGY760R, CGY755, Bavarian Demon BD 3X, BD AXON, etc.
Suitable motor: 4020–4035 size brushless outrunner (min. 20 mm free shaft) 900–1200KV for 6–8S LiPo or 4020–4035 with 500–550KV for 12S LiPo. 
ESC suitable for 6–8S: 100–150A heli brushless ESC, like Hobbywing Platinum PRO 150A V5 or similar.
ESC suitable for 12S: 80–120A HV (Opto) heli brushless ESC, like Hobbywing Platinum Platinum PRO 130A-HV V4, Platinum PRO 130A-HV Opto V4 or similar.
Flight pack: 6–8S LiPo 3300–5500 mAh min. 60C, 12S LiPo 2600–3300 mAh min. 60C.

The kit contents: The complete set of the mechanic/airframe parts (incl. cyclic mini servo holder) and manual; not included: main and tail rotor blades, brushless motor and electronics.