Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 135
rely newdevice for lateral stability. This is the sliding wingtip, by which the wing that tends to fall from itsproper level may be lengthened by 1*5 inches, theother wing being shortened as much at the same time. 134 FLYING MACHINES: THE MONOPLANE. There is no longitudinal structure, as in the… … The Pfitzner monoplane from the rear, showing the sliding wing tips; dihedralangle of the wings; square body; and transverse trussed construction. of the squares. They also support the guys reachingout to the tips of the wings. The plane proper is 31 feet in spread, to whichthe wing tips add 2^…
Aeronautics
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