Originally posted by Shifty 
Actually it helped prevent the left wing from stalling during slow speed turns because of the torque generated by the large prop on the F4U.
Errr I think......
 
 All you ever need to know...... Airplane 6 was an F4U-1.
From NACA Test Report 829:
 
 
 By the way, where they show the strip to be located was not where it was installed on production aircraft.
My regards,
Widewing