Three Curtiss P-40s were used for service testing. There were no YP-40 service test prototypes. (San Diego Air And Space Museum Archive)
Screen Shot 2016-02-11 at 10.00.15
This Day in Aviation
Important Dates in Aviation History
Three Curtiss P-40s were used for service testing. There were no YP-40 service test prototypes. (San Diego Air And Space Museum Archive)