Hutton, Frederick Remsen, 1853-1918 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 748
since be = dx cos a. There-fore the total upward force is the sum of the projections of all elements ofthe semi-cylindrical arc, or is equal to PD. Or, again, Pdx cos a may beintegrated between a = -f- 90 and a = — 90, which becomes P( R + P) — PD.The sketch at the right shows the reasoning when a… … Fig. 511.
Mechanical engineering · Steam power plants
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