Main gearboxes of "kamov" helicopters
The gearboxes VR-252, VR-226N are designed for installation on coaxial helicopters.
The purpose is to transfer power from two engines ТV3-117VМ/VМА (VR-252), AI-450, Allison, Arrius (VR-226N) to two coaxial rotors and helicopter accessory with the corresponding change of the rotation speed.
The main gearbox circuit is fixed-ratio, planetary (VR-252) and multi-flow (VR-226N).
Main technical specifications
|Gearboxes VR-226N (for Arrius-2G1)||Gearboxes VR-252|
|Gear ratio to main rotors shafts||0,0472||0,01815|
|Input shaft rotation speed, nominal, RPM||6000||15000|
|Power being transferred by gearbox, h.p.: maximum in single-engine operation mode
|Overall dimensions, mm:
|Developer||Krasny Octiabr||Klimov Corporation|