The CH-3E is the USAF
version of the Sikorsky S-61 amphibious transport helicopter developed
for the U.S. Navy. The USAF initially operated six Navy HSS-2 (SH-3A)
versions of the S-61 in 1962, eventually designating them CH-3A/Bs.
They were so successful the USAF ordered 75, modified as CH-3Cs,
featuring a new rear fuselage design with a ramp for vehicles and other
cargo. The first CH-3C was flown on June 17, 1963. When 41 CH-3Cs were
updated with more powerful engines in 1966, they were redesignated as
CH-3Es. Forty-five more were newly manufactured. Later, 50 CH-3Es were
modified for combat rescue missions with armour, defensive armament,
self-sealing fuel tanks, a rescue hoist, and in-flight refuelling
capability. They were redesignated HH-3Es and used extensively in
Vietnam under the nickname "Jolly Green Giant."
Main rotor diameter: 62 ft.
Fuselage Length: 73 ft. 0 in.
Height: 18 ft. 1 in.
Weight: 22,050 lbs. loaded
Armament: Provisions for two .50-cal. machine guns
Engines: Two General Electric T58-GE-5 turboshaft engines of
1,500 hp. each
Serial Number: 63-9676
Maximum speed: 177 mph.
Cruising speed: 154 mph.
Range: 779 miles with external fuel tanks
Service Ceiling: 21,000 ft.