The incivil beast and evansbe are both correct. For those who are wondering about the designations, the aircraft was a more refined development of the famous Me 163. It featured a retractrable undercarriage, pressurised cockpit and a dual chamber rocket motor giving increased endurance, armament was similar to the Komet. Because development progress was slow the whole project was handed over to Junkers who further refined the design, hence their designation. As the end of the war approached responsibility for it reverted to Messerschmitt. The V1 made several unpowered flights before it was captured by the Americans who gave it to the Russians and hence the MiG bureau who then developed the I270 from it. Confused?
