I worked with an engineer who had worked for Curtiss until he joined the Navy in 1943. He's still alive btw. He worked on the X-55 and the X-75 mockup. When the X-55 was determined to have no significant speed increase over the P-51 it was dropped. The X-75 was a twin with a 75mm gun made to shoot proximity shells at Japanese bombers. I think that they would have run out of Japanese bombers before it could get operational.
|