Airplane Model with Automatic Rudder

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An illustration of an airplane model with an automatic rudder. “a a, Elastic [airplane]; b b, Automatic rudder; c c, Aerial screw [centered] at f; d, Frame supporting [airplane] rudder and screw; e, India-rubber, in a state of torsion, attached to hook or crank at f. By holding the [airplane] ( a) and turning the screw (c c) the necessary power is obtained by torsion.” -Britannica, 1910


Encyclopaedia Britannica (11th ed., vol. 10) (New York, NY: The Encyclopaedia Britannica Company, 1910)


TIFF (full resolution)

2400×1219, 302.2 KiB

Large GIF

1024×520, 60.9 KiB

Medium GIF

640×325, 32.8 KiB

Small GIF

320×162, 11.4 KiB