Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 16
esented in Fig. 6, is about 12 in.from tip to tip of wings, and weighsRS.) fjrs.. one third of which consistsin the twisted rubber strings furnish-iuLT the motive power. The necessaryflexion of the wings, to obtain a pro-pelling as well as a sustaining reac-tion, is produced by triple… … Fig. 6.—Pichancourts mechanical bird. AERIAL NAVIGATION.
Mechanical engineering
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