First flight of a twin turbine powered helicopter (modified Kaman HTK-1)

Friday, March 26, 1954



The first time that any VTOL aircraft had flown using 2 turbine engines (Boeing 502-2) as the source of power to the main rotor.

This was a joint U.S. Army/Navy project using a modified, production Kaman HTK-1 helicopter.

Source: AHS Calendar March 2009


Aircraft related to this milestone
Kaman HTK-1 (Twin-turbine)

Related biographies
Charles H. Kaman