Pomilio, Ottorino · New York, McGraw-Hill · leaf 42
be impossible, as the machine tends to THE CONTROL SURFACES 27 turn sharply about at the least deviation from its normalcourse. In practice, since the center of gravity of an air-plane is found very close to the front end of the machine,the condition of directional stability is easily attained… … Fig. 28. type, in which the main wing surface is the one in the rear,(and consequently the e.g. falls entirely in the rear) andin which the problem of directional stability presentsconsiderable difficulty. This type of airplane, however, isnot used at the present time. A machine provided with only…
Airplanes
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