turboshaft
Noun
Meaning
turboshaft (plural turboshafts)
A gas-turbine engine designed to transmit power by means of a geared shaft, used in helicopters and for land and marine vehicular and stationary applications.
Examples
A CH-47 in a training exercise with US Navy Special Warfare, in July 2008 The CH-47 is powered by two Lycoming T55 turboshaft engines, mounted on each side of the helicopter's rear pylon and connected to the rotors by driveshafts.
Air Force The United States Air Force 's (USAF) competition for a helicopter to be used for support on missile bases included a specific requirement to mandate the use of the General Electric T58 turboshaft as a powerplant.
Design A U.S. Marine watches two CH-46 Sea Knights, 2002 The CH-46 has tandem counter-rotating rotors powered by two GE T58 turboshaft engines.
Among improvements were an Allison T53-L-703 turboshaft engine providing 1,343 kW (1,800 shp), a vibration-reduction system, infrared countermeasures, and a night-vision-goggle (NVG) compatible cockpit.
;CH-46A : Medium-lift assault and cargo transport and SAR helicopter for the USMC, fitted with two 1,250 shp (935 kW) General Electric T58-GE-8 turboshaft engines.
;CH-46D : Medium-lift assault and cargo transport helicopter for the USMC, fitted with two 1,400 shp (1,044 kW) General Electric T58-GE-10 turboshaft engines. 266 built.