Boeing JB-52E (Serial Number 57-0119) in flight. This aircraft was used to test the General Electric TF39-GE-1C turbofan to be used in the new C-5A Galaxy. The test engine was located on the right inboard pylon and replaced the twin Pratt &amp; Whitney J57 engines normally in that location. The single TF39 had about twice the thrust of the twin J57s it replaced.
US Goverment