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Shown here is the YLR-63-AJ-3 liquid-fuel rocket engine developed and built by the Aerojet-General Corporation for use as a built-in jet-assisted-take-off (JATO) on Republic Aircraft's F-84 fighter jet. Known as a super-performance engine, the YLR-63 was designed to increase the F-84's combat performance against Soviet MiG jets during the Korean War. The U.S. Air Force awarded the engine contract to Aerojet in 1953. The regeneratively cooled YLR-63 produced up to five thousand pounds of thrust and could be restarted multiple times.

Flight testing of the engine on F-84 aircraft began after the Korean War had ended. Consequently, the TLR-63 never became operational. It was the last of Aerojet's super-performance engines, having been replaced by more powerful jet engines equipped with afterburners. Aerojet gave this engine to the Museum in 1968.

 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 ca. 1956 Country of Origin United States of America Type PROPULSION-Components (Engine Parts) Manufacturer Aerojet General Corp.
 Dimensions Overall: 13 x 34 5/8 x 10 5/8 in., 88lb. (33 x 87.9 x 27cm, 39.9kg)
 Materials Steel
Paint
Aluminum
Non-Magnetic Alloy
Plastic
 Inventory Number A19680548000 Credit Line Gift of Aerojet General Corporation Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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