The Pratt & Whitney J75 was developed between 1951 and 1954 to meet the needs of advanced supersonic fighters under development for the U.S. Air Force and Navy. Its configuration and control, fuel and lubrication systems are similar to those of the smaller J57. The larger J75 incorporated many mechanical and aerodynamic improvements.

The military version with afterburner powered the Convair 106 interceptor and the Republic F105 Thunderchief fighter-bomber. This artifact is installed in the museum's F105, which served in Viet Nam. The commercial version of the J75 was certificated in 1957 and powered several long-range versions of the Boeing 707 and Douglas DC-8 airliners.

 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 1961 Country of Origin United States of America Type PROPULSION-Turbines (Jet) Manufacturer Pratt & Whitney Physical Description Type: Turbojet, Afterburner, Water Injection Thrust: 76,500 N (17,200 lb) dry, 117,872 N (26,500 lb) with afterburning Compressor: 8 low pressure axial, 7 high pressure axial Combustor: Annular, 8 flame tubes Turbine: Single stage high pressure axial, 2 stage low presuure axial Weight (dry): 2,706 kg (5,960 lb) Dimensions Length 6.1 m (20 ft), Diameter 109 cm (43.0 in.)
 Inventory Number A19820064004 Credit Line Transferred from the United States Air Force Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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