First flight of the Bristol Type 173 Mk. 1

Thursday, January 3, 1952



The Type 173 was the first Britsh helicopter to employ two engines and twin rotors. It was also the first compound helicopter that transferred some lift from the rotors to a fixed wing. The pilot was Charles "Sox" Hosegood. Chief Designer was Raoul Hafner.

Source: AHS Calendar January 2012


Source: "Bristol 173 Takes the Air", FLIGHT, 11 January 1952


Aircraft related to this milestone
Bristol Type 173


Related biographies
Raoul Hafner
Charles Hosegood