Noun
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.
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. Source: Internet
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. Source: Internet
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. Source: Internet
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. Source: Internet
;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. Source: Internet
;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. Source: Internet