The Keyheed F-13 was a concept fighter first thought of during the middle of the Gulf War. It’s often referred to as the “Lemming”, as it would sometimes just fall out of the sky, nearly literally. It had major engine problems which weren’t resolved until the introduction of the F-13B, So this is the original version. The TF-13 was the trainer, due to the ineptitude of the air force to realize that the true reason of many pilot deaths or ejections was from the engine, not the pilot, was introduced to “teach pilots how to fly the plane, since they obviously can’t” as the Air Force chief of staff explained it.
Links to the following versions will be posted below, as they are unlisted.
https://www.simpleplanes.com/a/lusOSA/Keyheed-TF-13
TF-13 Trainer