Flying machines: practice and design. Their principles, construction and working (1909)
Kennedy, Rankin, d. 1917 · London [etc.] : The Technical Publishing Co., limited · leaf 41
gs so that they swing over to a determined angle at each reversal of the rods' vibration, we will have in effect a Hargreaves' set of wings. The motion of the rods must be in a plane at right angles to the body B, and the motion of the wings at the reversal of the stroke must be in a plane at right… … FIG. 9. — Hargreaves' Wings. of hinged wings, flexible wings of thin springing material would be better, remains to be seen. Such a machine would require supporting aeroplanes, the wings acting as propellers only. In the Hargreaves' model the planes are end on. They would, we now know, be better…
Flying-machines · Aeronautics
Internet Archive · University of California Libraries · Public domain (published before 1931). Free to use for anything.
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