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.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date Circa 1960-68 Country of Origin United States of America Type PROPULSION-Turbines (Jet) Manufacturer General Electric Aircraft Engines
 Physical Description 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) Dimensions Length 149 cm (58.6 in.), Width 52.6 cm (20.7 in.), Height 54.6 cm (21.5 in.)
 Inventory Number A19920060000 Credit Line Transferred from the U.S. Navy Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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