The drag of a J-5 radial air-cooled engine

Fred E. Weick
Jul 1928

This note describes tests of the drag due to a Wright Whirlwind (J-5) radial air-cooled engine mounted on a cabin type airplane. The tests were made in the 20-foot Propeller Research Tunnel of the National Advisory Committee for Aeronautics. The drag was obtained with three different types of exhaust stacks: Short individual stacks, a circular cross section collector ring, and a streamline cross section collector ring.

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