The R200 ion jet engine, also known as R200 ion fission engine, was an ion engine produced by Koensayr Manufacturing, and was installed aboard their BTL-A4 Y-wing assault starfighter/bomber. The immense fission engines were turbo-modified and articulated disk-ventrals set in the end of the engine nacelles redirected the R200's ion thrust for increased agility. The two engines allowed the Y-wing to reach a maximum atmospheric speed of 1000 kilometers per hour.
- Star Wars: Card Trader (Card: Blueprints - Y-wing Starfighter) (First identified as R200 ion jet engine)
- Star Wars: Rogue One: The Ultimate Visual Guide (as R200 ion fission engine)
- Rebel Starfighters Owners' Workshop Manual