The Aeroplane Speaks by H. (Horatio) Barber
page 24 of 183 (13%)
page 24 of 183 (13%)
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with the Rigger to wash-out, that is decrease, the Angle
of Incidence on one side of the Aeroplane, and to effect the reverse condition, if it is not too much trouble, on the other side.'' ``But,'' objected Efficiency, ``the Lift varies with the Angle of Incidence, and surely such a condition will result in one side of the Aeroplane lifting more than the other side?' ``That's all right,'' said the Propeller, ``it's meant to off-set the tendency of the Aeroplane to turn over sideways in the opposite direction to which I revolve.'' ``That's quite clear, though rather unexpected; but how do you counteract the effect of the gusts when they try to overturn the Aeroplane sideways?'' said she, turning to Lateral Stability again. ``Well,'' he replied, rather miserably, ``I'm not nearly so perfect as the Longitudinal and Directional Stabilities. The Dihedral Angle--that is, the upward inclination of the Surfaces towards their wing-tips--does what it can for me, but, in my opinion, it's a more or less futile effort. The Blackboard will show you the argument.'' And he at once showed them two Surfaces, each set at a Dihedral Angle like this: ``Please imagine,'' said the Blackboard, ``that the top V is the front view of a Surface flying towards you. Now if a gust blows it into the position of the lower V you see |
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