The test aircraft for the BMW 003 A-1 engine with additionally installed BMW 109-718 liquid rocket engines. The project was accomplished under the name 'Heimatschutzer II' (Home protector II). This a/c was manufactured by SH, Schwabisch-Hall; the single prototype of Me.262C-2b. First flight on 08.01.1945 with rocket engine on the 26.03.1945.