R200 Ion Jet engines were an engine assembly manufactured by Koensayr Manufacturing, utilized in that company's line of BTL Y-wing starfighters. It was a significant component in the Rebel Alliance's struggle against the Galactic Empire.
Twin Koensayr R200 Ion Jet engines, rated at 250 KTU, propelled the BTL Y-wing starfighter in realspace. In an atmosphere, these ion fission engines worked in conjunction with recessed repulsorlift generators to attain speeds of 1,000 kilometers per hour. Each engine featured a sophisticated sensor array housed in domes at the front of the nacelle.
The R200 Ion Jet engines worked in the midst of the Koensayr R300-H hyperdrive unit are housed in the midsection, which was simply a reinforced central spar extending from the cockpit. Attached to this spar was a thin cross-wing, which contained the Thiodyne 03-R cryogenic power cells and connected the craft to the sublight drives.
The R200 Ion Jet Engine served as the Y-wing's main propulsion system. Y-wings were the most common craft in the Rebel Alliance, and R200 engines propelled these sturdy ships in the Battle of Yavin, during the assault on the first Death Star, as well as the Battle of Endor, during the Rebellion's destruction of the second Death Star.