An investigation has been conducted in the Langley full-scale tunnel to determine the performance and static stability and control characteristics of a flexible-wing manned test vehicle. This airplane is a simplified research machine, which consists basically of a cargo platform attached to a parawing by means of an overhead truss arrangement.' In addition to the basic control tests, a few tests were made to evaluate several alternate control systems which involved deflections of the aft portion of the parawing keel and wing tips.nThe tunnel tests showed that the maximum lift coefficient of the airplane occurred at a keel angle of attack of 42° and was 1.24 with power off and 1-33 with power on.
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