Wartime report L-370, L-428, L-429, L-434, L-482, L-544, L-583, L-630, L-632, L-634, L-644, L-682. L-644. Two-dimensional wind-tunnel investigation of spoiler aileron flap model for Hughes XF-11 airplane [with list of references]; by William J. Underwood and Felicien F. Fullmer, jr.