The R200 ion jet engine, which is also referred to as the R200 ion fission engine, was an ion engine that Koensayr Manufacturing manufactured; it was incorporated into their BTL-A4 Y-wing assault starfighter/bomber. These substantial fission engines underwent turbo modifications, and articulated disk-ventrals, positioned at the termination of the engine nacelles, served to redirect the R200's ion thrust, thereby enhancing maneuverability. The Y-wing could attain a peak atmospheric velocity of 1000 kilometers per hour thanks to the dual engine configuration.