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The S-61 series of
helicopters began with a US Navy requirement for a new anti-submarine
helicopter. The prototype made its first flight in 1959 and the type
entered production in 1960 as the S-61A. The US military designation was
CH-3A and 251 were built for the US Navy, entering service in 1961. This
early version of the S-61 was also delivered to the Malaysian Air Force
as the S-61A-4 (40 built), the Royal Danish Air Force as the S-61A-1 (9
built) and the Canadian Navy as the CH-124 (41 built). The S-61B was
first flown in 1962 with more powerful engines. An S-61A-1 of the Royal
Danish Air Force is shown below.
U-240 c/n 61-240
USA 20
seat helicopter first flown in 1959
Engines: 2X 1,250shp(931kW) GE T58-GE-8C/F
Length:
54'9"(16.69m) Height:
16'10"(5.13m)Rotor diameter: 62'0"(18.9m) No.built:
341 Range: 625miles(1,005km) Cruising speed:
130mph(209kmh)Empty weight: 11,700lb(5,300kg) Maximum take-off weight:
21,000lb(9,513kg)Service ceiling: 10,800' |
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