Water-power; an outline of the development and application of the energy of flowing water . water rises 2 feet above the flashboards //^ — 6, //j = 2, /* = ^ X X 32 = 1000. 2 216—8H—6 ^ = feet = 20 inches. External 3 36 - 4 7t moment = 20000 inch-pounds. Internal moment = —/X 3f. 32 f — ~ X = say 10 X — = nearly 60 000 lbs. 32 20000 20000 — X = say 10 X — ^ 3-375 3-375 This result shows that while pins of ordinary iron wouldstand safely with water at top of flashboards, they would failbefore the water had risen much over 2 feet above the a height of 4 feet is attempted th
Water-power; an outline of the development and application of the energy of flowing water . water rises 2 feet above the flashboards //^ — 6, //j = 2, /* = ^ X X 32 = 1000. 2 216—8H—6 ^ = feet = 20 inches. External 3 36 - 4 7t moment = 20000 inch-pounds. Internal moment = —/X 3f. 32 f — ~ X = say 10 X — = nearly 60 000 lbs. 32 20000 20000 — X = say 10 X — ^ 3-375 3-375 This result shows that while pins of ordinary iron wouldstand safely with water at top of flashboards, they would failbefore the water had risen much over 2 feet above the a height of 4 feet is attempted the pins are often ofdifferent lengths, alternately 2 and 4 feet as at Fig. 6^. For regulating the height of water at wasteways in canalswhich are not subject to river fluctuations the form of flash-boards indicated at Figs. 68 and 69 is often used. Tliese 146 APPENDAGES OF DAMS. consist of stout boarc^s, 4 to 6 feet in length, placed horizontallyand provided with handles. Piers are erected on the \veir, builtof plank 6 or 8 inches thick, set edgewise one above the other,. Fig. 68.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthydraulicengineering
