Tests have been made to determine the effects of wing-tip fuel tanks on the rolling characteristics of unswept wings. The investi¬gation included the determination of damping in roll, aileron effec¬tiveness, and lateral maneuverability of a tapered and of a rectangular wing. Two tank sizes and two tank locations, which were believed to be representative of tank installations used at the present, were investigated.nResults of tests indicated that wing-tip fuel tanks of sizes generally used at present increased the damping in roll and the aileron effectiveness of the wings investigated as much as 44 percent and 16 percent, respectively.
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