Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 160
feet, but theusual movement in ordinary wind currents is rarelymore than an inch. In climbing to high levels orswooping down rapidly the extreme play of the rodis about four or five inches. Thus the steering wheel controls both the horizon-tal and vertical movements of the aeroplane. Morethan this,… … 160 FLYING MACHINES: HOW TO OPERATE, force in the air to the sensitive touch of the pilot,enabling him instinctively to rise or dip as the cur-rent compels. The preserving of an even keel is accomplishedin the Curtiss machine by small planes hinged be-tween the main planes at the outer ends.…
Aeronautics
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