Patent ID: 9708074
Date: 2017-07-18
CPC Classifications: B64C,B64D

Claim:
1. A helicopter with a drive system, comprising: a main drive configured to drive a lift-generating rotor of the helicopter; a flywheel mass battery comprising at least one flywheel; a first transmission coupling the flywheel mass battery to the main drive such that, during operation of the main drive, output is transferred from the main drive to the flywheel mass battery; a second, variable transmission connecting the flywheel mass battery to the lift-generating rotor of the helicopter such that a predetermined output is transferred to the lift-generating rotor through adjustment of a transmission ratio of the variable transmission; and a main transmission between the main drive and the lift-generating rotor, wherein the main transmission comprises a first input with which the main drive is coupled, wherein the main transmission has a second input with which the flywheel mass battery is coupled via the variable transmission.