The Avco/Pratt & Whitney T800 (company designation APW34) was a turboshaft engine for rotary wing applications, and was produced by Avco/Pratt & Whitney (APW), a joint venture between Avco Lycoming and Pratt & Whitney. The engine was developed for the United States Army's LHX armed reconnaissance helicopter competition to develop the Boeing-Sikorsky RAH-66 Comanche, but lost to the competing LHTEC T800 in 1988.[1]
Leyes II, Richard A.; William A. Fleming (1999). "5". The History of North American Small Gas Turbine Aircraft Engines. Washington, DC: Smithsonian Institution. ISBN1-56347-332-1.