General Electric T700

The engines T700 and CT7 belong to a family of turboshaft and turboprop engines from General Electric in the class of 1100 to 1850 kW. They are available as drive a variety of helicopters and small commercial aircraft in use.

Development

In 1967 General Electric on a demonstrator ( the GE12 ) for a new wave turbine to work. Reason was the interest of the U.S. Army on a transport helicopter in the next generation. The mission of the Army led to the development of the Sikorsky S- 70 Black Hawk, the two GE T700 turbines ( the production version of the GE12 ) were driven. The T700 has been tested since 1973, admitted in 1976 and went into production in 1978.

Its first version, T700 -GE- 700, a turbine shaft having a five-stage and single-stage radial axial mixing compressor driven by a two-stage turbine. The Axialverdichterstufen are designed as blisk. The inlet guide vanes and the first two stator stages are designed to be adjustable. The annular combustion chamber with central fuel injection ensures good combustion of the fuel and low smoke emission. The output shaft is driven by a two-stage turbine. The drive has been designed for high reliability. So comes at the air inlet, a filter is used, the dirt, sand and dust deposits. The T700 -GE- 700 is approved for a capacity of 1210 kW.

The T700 -GE- 700 was followed by improved and uprated engine variants, which came to the military helicopter UH -60 Black Hawk/SH-60 Seahawk, AH -64 Apache, Kaman SH -2G Super Seasprite and Bell AH- 1W Super Cobra to use. They are also used as a drive for some versions of the AgustaWestland EH101 and the NH90.

The civilian version of the T700 is the CT7 from 1984, one in use. It comes at the Bell 214ST ( an improved version of the Huey ), civil Blackhawks and the Sikorsky S-92 ( a derivative of the Black Hawk ) are used, which are all models with two turbines. The CT7 - 8 for the S-92 has a maximum take-off power of 1879 kW, a length of 1.24 m and a weight of 243 kg.

There are versions of the turbo- CT7, which are equipped with a reduction gear for driving the propeller. They are used in smaller twin-engined transport aircraft such as the Swedish SAAB 340, the Indonesian- Spanish Airtech CN -235 Cargo Lifter and the Czech Let L- 610G. The base variant CT7 -5A provides 1294 kW take-off power. The CT7 - 6 corresponds to the military version T700 - T6A1.

The following variant YT706 (also called the CT7 - 8B5 or T706 -GE -700) based on the CT7 -8A engine, which was approved in 2002 by the FAA. In comparison with the T700, the YT706 has a larger compressor to provide an improved engine core and a FADEC. It offers up to 30 percent more power than the current T700 - 701C and improves skills for use in areas with specific climatic conditions ( hot and high emission ) of the MH -60M Black Hawk, which is used by the U.S. Army Special Operations. The CT- CT - 8C and 8E are improved versions with revised high pressure turbine and a new three-stage low-pressure turbine for the H- 92 and EH101.

Use

T700

  • AH -1W / Z Super Cobra T700 - 401C
  • SH -2G Super Seasprite T700 - 401C
  • UH -1Y Venom T700 - 401C
  • AH- 64 Apache T700 - 701C, T700 - 701d
  • UH -60 Black Hawk T700 - 701C, T700 - 701d (UH -60L )
  • SH-60 Seahawk T700 - 401C
  • HH-60 Jayhawk T700 - 401C
  • MH -60 G / K T700 - 701C, T700 - 701d
  • CH -148 Cyclone
  • AgustaWestland EH101/CH-149 Cormorant/VH-71 Kestrel T700 - T6A1, T700 - T6A1, CT7-6/-6A
  • NH90 T700-T6E/T6E1
  • Piasecki X -49

CT7

  • AgustaWestland AW149
  • AgustaWestland AW189
  • Bell 214ST CT7 -2
  • Sikorsky S- 70C CT7 -2, CT7 -2D
  • Sikorsky S-92 CT7 -8
  • Sikorsky H -92 Superhawk CT7 -8C

CT7 Turboprop

  • CASA / IPTN CN -235 CT7
  • Saab 340 CT7
  • Sukhoi S-80 CT7

Specifications

The turbine shaft has a six -stage compressor ( five stages axially, a stage radial), an annular combustion chamber, and a two-stage each high-pressure and low pressure / power turbine.

Piasecki X-49 General Electric J47 General Electric J73 General Electric J79 General Electric F101 General Electric F110 General Electric F118 General Electric F404 General Electric F414 Walter M601 General Electric T58 General Electric T64 Allison T56 Allison Model 250 LHTEC T800
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