Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 49
gravity acting directlydownward, shown by CG. We have given, therefore,the three forces, CD, CF, and CG. We now wish tofind the value of the pull on the kite-string, CD, intwo other forces, one of which shall be a lifting force,acting directly upward, and the other a propellingforce, acting in the… … PIRST Solution
Aeronautics
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