Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 196
ful models aredriven by twin propellers measuring about twelveinches in diameter, which is fully twice the sizeof the early designs. The pitch of these propel-lers is often as high as thirty-four inches. Inother words, the model-aeroplane thus equippedis driven forward, theoretically, nearly one…
Children's literature
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