Excerpt from Propeller Characteristics and Slipstream Effects on a High Wing Monoplane From Wind Tunnel Tests: Thesis
The principal advantages of a powered model test over a full scale flight test are ease of control and facility in measuring the forces and moments develone( In the wind tunnel, power output results are read on the external balance system as in a normal Wind tunnel test. The six component system is shown in Vigure 1, Here, air velocity, geometrical angle of attack, thrust, drag, lift and moments are measured. The measurement of power input is more complicated and is accomplished by means of a revolution co'nter and a torque meter.
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