D, must also passthrough the centre ofgravity (fig. 28). Anincrease of the value ofthe propeller thrustdoes not introduce any moment about the C.G., so that the machine has no tendencyto turn about a lateral axis, and hence in an equihbrium posirtion the direction and the point of application of… … Fig. 28. 60 THE AEROPLANE. Hj introduces a new air force Rj, so that Hj, Ri, and W are re-presented in magnitude and direction by the sides of a triangle taken in order (seefig. 28). It follows,then, that if theelevator position befixed, variations inthe magnitude of thepropeller thrust willproduce…
Airplanes
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