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The T700 engine evolved directly from Army experience in the Vietnam War's difficult operating conditions that created helicopter engine maintenance problems. GE won the 1971 power plant competition for the proposed Utility Tactical Transport System (UTTAS) helicopter, with specifications for a high performance, low fuel consumption, reduced maintenance, and combat damage resistant engine. This is one of the experimental engines used in the UTTAS rotorcraft competition in 1974.

Modular construction allowed major engine assemblies to be replaced in the field within minutes. New compressor and intake design reduced maintenance and foreign object damage. A self-contained oil system and suction fuel system made the engine less vulnerable to combat damage.

Among military T700 powered helicopters were the Sikorsky UH-60 Black Hawk and SH-60 Seahawk, McDonnell Douglas AH-64 Apache, and Bell AH-1W SuperCobra. Commercial applications included the Bell 214ST and Sikorsky S-70C. The CT7 turboprop version powered such commuter aircraft as the Saab 340 and CASA/IPTN CN-235.

 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 1974 Country of Origin United States of America Type PROPULSION-Turbines (Jet) Manufacturer General Electric Aircraft Engines
 Physical Description Type: Turboshaft Power Rating: 1,167 kW (1,565 shp) Compressor: 5-stage axial, single-stage centrifugal Combustor: Annular Turbine: 2-stage axial gas generator turbine, 2-stage axial power turbine Weight: 192 kg (423 lb) Dimensions Length 118.1 cm (46.5 in.), Diameter 63.5 cm (25 in.)
 Materials Aluminum, Steel, Stainless steel, Plastic, Rubber, Paint, Inconel
 Inventory Number A19860224000 Credit Line Transferred from the U.S. Army Data Source National Air and Space Museum Restrictions & Rights Open Access (CCO)
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