The J85 turbojet is a powerplant that was offered in both non-augmented and augmented versions for high performance trainers and tactical aircraft. With more than 75 million flight hours experience on military and commercial models, the J85 offers the highest thrust-to-weight ratio of any production engine in its class.
J85 engines first entered service in 1960. More than 6,000 engines flying in a number of applications remain in active service in 35 countries. Current plans for the U.S. Air Force (USAF) call for J85-powered aircraft to be in service through 2040.