Who was the son of Baptist Ferdinand Messerschmitt and designed a German single-engine high-wing sports monoplane?
Messerschmitt M 17: The M 17 was a German single-engine high-wing sports monoplane. Willy Messerschmitt:  He was born in Frankfurt am Main, the son of Baptist Ferdinand Messerschmitt (1858–1916) and his second wife, Anna Maria née Schaller (1867–1942).
i don't know