Wind-tunnel investigation of a full-span retractable flap in combination with full-span plain and internally balanced ailerons on a tapered wing

are reprints of papers originally issued to provide rapid distribution of advance research results to an authorized group requiring them for the war effort.They were previously held under a security status but are now unclassified.Some of these reports were not technically edited.All have been reproduced without change in order to expedite general distribution.