Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 639
oper size and position of theseguiding surfaces. It is argued by some aviatorsthat the rudder should be placed above the plane,where the air is undisturbed, while others believethat the partial vacuum created above the wingsin flight makes this rudder ineffective. Stillothers argue that a rudder… … FIG. 6. A FOLDING MODEL. THE PLANES ARE TOO LARGE. propellers. In building these the greatest careshould be taken to have them exactly the samesize, weight, and pitch. Twin propellers should,as a rule, be placed at the front of the machine,that is, they should pull and not push the planes.If by any…
Children's literature
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