FLYING WINDED HELICOPTER Russian patent published in 2015 - IPC A63H1/06 

FIELD: aircraft engineering.

SUBSTANCE: step-up planetary gearing comprises pinions, winder is composed of a ratchet wheel arranged at airframe to run in one direction and including ratchet teeth and inner gearing teeth on inner surface and notches on outer surface. Note here that ratchet pawl is made on airframe. Note also that helical spring outer end is secured at said airframe while inner end is coupled with the shaft of spider provided with cover. Note that upper and lower rotors have upper and lower blades. Every of said upper and lower blades can be made of a single part or separately and coupled by appropriate fastener. Upper rotor hub and cover can be composed by single part or made separately. Upper rotor upper blades can be integrated with cover while lower rotor lower blades can be integrated with airframe. Device can incorporate several helical springs.

EFFECT: increased range owing to reduced weight and overall dimensions, improved manufacturability.

8 cl, 4 dwg