Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 226
822. OUTWARD THRUST PROPELLERWHEEL.—The blades pitch forward to throw thewater outward as well as backward, to increasethe thrust or power of the wheel. 823. SCREW PROPELLER. Four blades. Or-dinary form for heavy draft tugs and tow-boats. 824. SCREW PROPELLER, Griffithmodel. The inclination of the…
Mechanical movements
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