Improvement for rotorcraft equipped with turboshaft engines

摘要

The rotocraft has a main transmission mechanism connected to a forward lifting rotor and a turbo-shaft engine to allow driving of the rotor and the turbo-shaft engine. The engine includes a free turbine (132) connected to the transmission mechanism in a shaft (15). An external compressor (19) at the engine is arranged for being driven by the free turbine or by an electric motor via the transmission mechanism. An air transmitting conduit (21) connects the external compressor to the engine to deliver the air compressed by the compressor to an inlet (22) of the engine.