Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 549
The Boys Book of Model Aeroplanes The unerring flight of birds is, of course, themodel for the builders of heavier-than-air ma-chines. Much of the birds skill in directing mo-tive power remains a mystery to us, but we arelearning to analyze and, in a measure, imitatethem. The builder of model… … A BIPLANE MODEL OF IQII. ILLUSTRATING THE REIOF PLANE SURFACE. ence of opinion as to the best plan for stabilizingthe aeroplane. Directional stability is gained by the use ofhorizontal elevators, or tails, for controlling ver-tical movement, by vertical rudders, or fins, forsteering to right or…
Children's literature
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