Originally posted by Ecliptik
Har

Republic XF-12 Rainbow.
Interesting plane to bear the 'F' designation. It was intended for photo recon.
All USAAF photo ships were designated with an "F", as in F-4, F-5 (modified P-38s) and the F-6 (a modified P-51D). Later, this was changed to an "R". At that point, this aircraft was the XR-12.
"Republic Aviation’s F-12 was born out of the same competition as the Hughes XF-11 in response to the pressing need for speed, ceiling and range in a photo-reconnaissance aircraft. The first flight of the XF-12 was made on Feb. 4, 1946, which demonstrated the capability of operating at 45,000 feet at a speed of 470 mph over a range of 4,500 miles."
My regards,
Widewing