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The Sikorsky HH-52 Seaguard (company designation S-62) is an early amphibious helicopter designed and produced by American helicopter manufacturer Sikorsky Aircraft. It was the first of the company's amphibious rotorcraft to fly and the United States Coast Guard's first turbine-powered helicopter and first amphibious helicopter.
A USCG Sikorsky HH-52A Seaguard, 1448, strikes three electrical transmission wires and crashes into the ice-filled Illinois River. The crew had been performing an aerial ice patrol along the Illinois and Mississippi Rivers. The Air Station the aircraft and/or crew were assigned to was AIRSTA Chicago. 10 February
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The SA366 G1 Dauphin version was selected by the United States Coast Guard in 1979 as its new short range recovery (SRR) air-sea rescue helicopter, replacing the Sikorsky HH-52A Sea Guard. In total 99 helicopters, optimised for the USCG's search and rescue role tasks and given the designation HH-65A Dolphin, were acquired.
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A United States Air Force Sikorsky MH-53 (HH-53B "Super Jolly Green Giant") registration number 66-14435, assigned to the 551st Special Operations Squadron (then the 1551st) crashed at the 6,000 foot level (N35-25-13, W107-20-37) of 11,301 foot Mount Taylor near Grants, New Mexico. Four of the six aboard perished at the crash site, the two ...
Sikorsky Aircraft began designing the S-52 in late 1945. [3] The prototype S-52, first flown in 1947, was a two-seater and used a 178 hp (133 kW) Franklin air-cooled flat-six piston engine . [ 2 ] The prototype pioneered the use of all-metal main and tail rotor blades along with offset flapping hinges for the main rotor, which allowed greater ...
a single stage power turbine. which delivers power to the rear of the engine. The hot exhaust stream is diverted sideways, away from the output shaft. the combustor is a straight-through annular design, rather than reverse flow. The main production version of the engine was the T58-GE-10, developing 1,400 hp (1,044 kW). The most powerful ...