Question: What is the name of a German rocket-powered fighter aircraft designed by Alexander Lippisch, the original version being the first to exceed 1000km/h and the subsequent version, known as the Me 263 Scholle having had 3 prototypes, non of which were ever flown?
Sentence (from "Messerschmitt Me 263"): The Messerschmitt Me 263 "Scholle" (plaice) was a rocket-powered fighter aircraft developed from the Me 163 "Komet" towards the end of World War II.
Relevant evidence: Yes