Charles Lindbergh wrote in
There is a tremendous amount of of interesting information about the
P-39 he

http://en.wikipedia.org/wiki/Bell_P-39_Airacobra

There is no attribution, but supposedly a modified P-39 won the
Thomson trophy in 1946.



http://www.airrace.com/1946NAR.html

Thompson "R" division
300 miles 10 laps of a 30 mile course

Place Pilot Race No Aircraft Speed
1 Alvin "Tex" Johnson 84 P-39Q 373.908
2 Tony LeVier 3 P-38L 370.193