Supermarine Type 517 Fighter Prototype
Supermarine Type 517 was the Supermarine Type 510 modified with a variable incidence tailplane. The Type 517 was further modified with a tricycle undercarriage, becoming the Type 535.
After additional development this became the Supermarine Swift.
Supermarine Type 517 
Supermarine Type 517 Deck Landing Trial Illustrious 1950
