Developed under a 1953 U.S. Navy contract, the T58 was GE's first small gas turbine aircraft engine. Its first flight took place in 1957 in a modified Sikorsky HSS-1F helicopter powered by two YT58 engines. More than 6,000 T58 and CT58 (civilian version) engines were built between 1956 and 1984, most for military helicopters. A first-generation turbine engine, the T58 improved helicopter speed, payload, and safety.
Among military helicopter applications were the Sikorsky SH-3 Sea King, Sikorsky HH-3E Jolly Green Giant, Kaman SH-2 Seasprite, Sikorsky HH-52 Sea Guard, and Boeing Vertol CH-46A Sea Knight. The CT58 was the first gas turbine helicopter engine certificated by the FAA, powering the Sikorsky S-62 for Los Angeles Airways beginning in late-1960. Other CT58-powered helicopters included the Sikorsky S-61 and Vertol 107.
This artifact powered a Navy Sikorsky SH-3G utility helicopter. The -8F also powered the Marine Sikorsky VH-3A VIP helicopters for Presidential use, and similar HH-3A search and rescue helicopters.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Circa 1960-68
United States of America
PROPULSION-Turbines (Jet)
General Electric Aircraft Engines
Type: Turboshaft
Power rating: 1,007 kW (1,350 shp) at 19,500 rpm
Compressor: 10-stage axial
Combustor: Annular
Turbine: 2-stage axial for gas generator, single-stage axial free power turbine
Weight: 138 kg (305 lb)
Length 149 cm (58.6 in.), Width 52.6 cm (20.7 in.), Height 54.6 cm (21.5 in.)
A19920060000
Transferred from the U.S. Navy
National Air and Space Museum
Usage conditions apply
For more information, visit the Smithsonians Terms of Use.