The Twenty-Foot Propeller Research Tunnel of the National Advisory Committee for Aeronautics (1929)
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10 REPORT NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS The rear post has a ball-and-socket attachment to the fuselage. The drag of these supports is reduced by streamline fairings which also serve to cover wires and fuel and water lines running to the fuselage. … Fig. 9 TORQUE DYNAMOMETER As the engine power is one of the major variables determining the propeller characteristics, a test fuselage has been developed which allows the engine driving the propeller to be mounted on a dynamometer and the torque to be measured directly. As shown in Figure 10, this…
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