RE: RE: Do you know your airplanes? (Quiz)
Berezniak-Isayev 1. BI-1 It was a contemporary of the Me-163 and far less successful. It made one rocket powered flight in May 1942. Other powered flights did not happen until March 1943. The Me 163A first flew under rocket power in August 1941, and the production Me-163B flew in August 1943 under rocket power, after almost a year of unpowered flights because the Walther rocket motor was not ready.
Also, I think the XP-55 predated the Shinden by at least a year and had many flights while the Shinden made only a few