Tests of Five Metal Model Propellers with Various Pitch Distributions in a Free Wind Stream and in Combination with Model VE-7 Fuselage (1930)
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est procedure is as follows: • 1. Check torque and thrust zeros. 2. With wind speed of about 66 feet per second, adjust angular velocity of propeller to give zero thrust and make simultaneous obser- vations for thrust, torque, angular velocity and Figure 3—Arrangement of apparatus for free stream… … Figure 4.—Arrangement of apparatus for test with model fuselage the connection to the balance being a wire with suitable bridle around the propeller. Preliminary tests were made to deter- mine the drag of the model without the propeller. The drag of the model was also measured
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