McDonnell XF-88 Voodoo

The McDonnell XF-88 Voodoo was a long-range twin-engine jet fighter aircraft with swept wings. It was designed to meet a requirement for a single-seat long range escort fighter. It was a recipient of a contract for two airplanes on 14th February 1947. It was powered by two 3000lb st (1361kgp) Westinghouse XJ34-WE-13 turbojets.
The first XF-88 flew for the first time on 20th October 1948 and it proved to be seriously underpowered forcing the second prototype to be refitted with two XJ34 WE-15 with short afterburners which boosted the maximum thrust to 4825lb (2190kgp), but performance wasn't enough yet. However, it was considered by the United States Air Force that this design had development potential and a letter of intent was issued covering further evolution on what would eventually become the McDonnell F-101 Voodoo. It was later refitted with an Allison XT-38-A-5 Turboprop in the nose and was used as a testbed for transonic and supersonic propellers and received the denomination of XF-88B.

Sources:
1. Salamander Books - The Complete Book of Fighters
2. https://en.wikipedia.org/wiki/McDonnell_XF-88_Voodoo