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[1]: 14 Similar pendulum tests were subsequently performed at Langley for Bell UH-1H [5] and AH-1S helicopters in 1981 and 1982. [6] All small to medium [a] United States Army helicopters were fitted with WSPS in a retrofit programme that was completed in 1992. [7] Between 1996 and 2002 the US Army had no fatal wire strike accidents. [7]
The Bell UH-1N Twin Huey is a medium military helicopter designed and produced by the American aerospace manufacturer Bell Helicopter.It is a member of the extensive Huey family, the initial version was the CUH-1N Twin Huey (later CH-135 Twin Huey), which was first ordered by the Canadian Forces in 1968.
A Bell XH-40, a prototype of the UH-1 and Bell 204. Bell designed its Model 204 in response to a 1955 United States Army requirement for a utility helicopter. The 204 was a giant step forward in helicopter design, being one of the first to be powered by a turboshaft.
The YR-13 was powered by a 175 hp (130 kW) Franklin O-335-1 piston engine. 10 of the aircraft were transferred to the U.S. Navy for evaluation as the HTL-1, with two HTL-1s later transferred to US Coast Guard. [11] YR-13A 3 YR-13 aircraft winterized for cold-weather testing in Alaska. Redesignated YH-13A in 1948. [12] HTL-2
The Sikorsky H-5 (initially designated R-5 [a] and also known as S-48, S-51 and by company designation VS-327 [1]) is a helicopter built by Sikorsky Aircraft Corporation.. It was used by the United States Air Force, and its predecessor, the United States Army Air Forces, as well as the United States Navy and United States Coast Guard (with the designations HO2S and HO3S).
Bell Helicopters was the winner of a 1963 United States Air Force competition for a support helicopter for use on its missile bases. [ 3 ] Bell had proposed the UH-1B for the competition but the USAF asked Bell to develop a special version of the "Bravo" in using the General Electric T58 turboshaft as a powerplant.
The Eurocopter (now Airbus Helicopters) EC120 Colibri ("hummingbird") is a five-seat, single-engine, light utility helicopter.Jointly designed and developed by Eurocopter, China National Aero-Technology Import & Export Corporation (), Harbin Aviation Industries (Group) Ltd (HAIG) and Singapore Technologies Aerospace Ltd (STAero) at Eurocopter France's Marignane facility, the EC120B was ...
In 1996, the USMC launched the H-1 upgrade program by signing a contract with Bell Helicopter for upgrading 180 AH-1Ws into AH-1Zs and upgrading 100 UH-1Ns into UH-1Ys. [6] [8] The H-1 program created completely modernized attack and utility helicopters with considerable design commonality to reduce operating costs. The AH-1Z and UH-1Y share a ...