OK fair enough but the war ended in 1945 and the air war ended way before then at least in Britain we arent talking a massive window. If we are talking the entirety of the 1940's then its none of the above;
He said 1940 la5 maiden flight was 1942 P-47 maiden flight was 1941 FW-190 was 1939 but not produced till later. So yea it is true. Its also true to say that technology moves very fast when there is a war on.