General Electric CJ610

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J85 ge 17a turbojet engine.jpg
The CJ610 is derived from the military J85, pictured
Type Turbojet
National origin United States
Manufacturer General Electric
First run 1960s
Major applications Learjet 23
Aero Commander 1121
Developed from General Electric J85
Developed into General Electric CF700

The General Electric CJ610 is a non-afterburning turbojet engine derived from the military J85, and is used on a number of civilian business jets. The model has logged over 16.5 million hours of operation. Civilian versions have powered business jets such as the Learjet 23 and the Hamburger Flugzeugbau HFB 320 Hansa Jet. The engines are also used in the flyable Messerschmitt Me 262 reproductions built by the Me 262 Project in the United States.

A development, the CF700, added a rear-mounted fan mounted directly on the free-running low-pressure turbine.


2,850 lbf (12.7 kN) thrust
2,400 lbf (11 kN) thrust
2,850 lbf (12.7 kN) thrust
2,950 lbf (13.1 kN) thrust


Early 1121 Jet Commanders are powered by thin CJ610 turbojets

Specifications (CJ610)[edit]

General characteristics

  • Type: Turbojet
  • Length: 45.4–51.1 in (1.15–1.30 m) (depending on accessory equipment installed)
  • Diameter: 17.7 in (0.45 m)
  • Dry weight: 396–421 lb (180–191 kg) (depending on accessory equipment installed)


  • Compressor: 8-stage axial flow
  • Turbine: 2-stage


See also[edit]

Related development

Comparable engines

Related lists


  1. ^ Gunston, 2006. P. 308
  2. ^ The "c" suffix stands for the flyable reproductions equipped with the J85-derived CJ610 engine instead of the original Junkers Jumo 004 jet engine.
  • Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. ISBN 0-7509-4479-X.

External links[edit]