Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 173
action of Marmonier gyroscopic pendulum. weather is extremely pleasurable, a protracted flightis very fatiguing; and wdien it is necessary to wrestle 172 FLYING MACHINES: HOW TO OPERATE, with gusts of high wind and fickle air currents, thestrain upon the strongest nerve is a serious sourceof danger… … In that inclined position the aeroplane makes the turn, and when the courseagain becomes straight, both the gyroscopic and centrifugal forces cease,and the pendulum under the influence of gravity becomes vertical. Inthis position it is inclined to the left with respect to the planes, on whichits…
Aeronautics
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