The 1959 Model 500 that was tested briefly before being canceled.
Mike Rodina of Hampshire, Illinois, has the only Taylorcraft 500 on the registry. Basically a Model 20, it had a fifth seat mounted at an angle in the cargo compartment. The rear seats tilted forward to allow access, but after brief experimentation the idea was dropped. The 500 was also to have a nosewheel and disk brakes. It got the brakes, but the nosewheel modification was never attempted.