. Better fruit. Fruit-culture. 1919 BETTER FRUIT Page 21 but depends as well upon the lift to be overcome. By multiplying the brake horsepower per foot of lift by tlie lift, from data given in the next table, an idea is obtained of the size of engine needed. Number of Centrifugal Brake EfTiciency Pump per foot of Pump 2 ; 08 30% 3 14 40% 4 22 45% 5 34 50% 6 46 50% Hence, in the example given above, if the suction lift from the surface of the water, when down to pumping level, is eighteen feet and the rise from pump to discharge is ten feet, then the total lift is twenty-eight feet, requir
. Better fruit. Fruit-culture. 1919 BETTER FRUIT Page 21 but depends as well upon the lift to be overcome. By multiplying the brake horsepower per foot of lift by tlie lift, from data given in the next table, an idea is obtained of the size of engine needed. Number of Centrifugal Brake EfTiciency Pump per foot of Pump 2 ; 08 30% 3 14 40% 4 22 45% 5 34 50% 6 46 50% Hence, in the example given above, if the suction lift from the surface of the water, when down to pumping level, is eighteen feet and the rise from pump to discharge is ten feet, then the total lift is twenty-eight feet, requiring, for the six-inch pump, .46 for each foot, or an engine of 12 ( to be exact). Some idea of costs in normal times is presented in the following table: COST OF CENTRIFUGAL PUMP No. 2 $ No. 3 No. 4 No. 5 No. 6 COST OF ENGINES Electric Gasoline Horsepower Motor Engine 5 $ $ 10 20 40 A comparison of fuel, based on per brake horsepower per hour, permits an inquiry into which is cheaper, low in- stallation and high fuel cost, or the reverse: If gasoline is $ ? $ Other fuels are worth: Crude oil, per .55 .93 Coal, per ton Electric power, per hour Ill .185 .370 .480 Cost per brake per hour 100 .166 .333 .433 For a rough estimate to cover cost of valves, priming pumps, all fittings, and suction but not discharge pipe, add 10% of the cost of pump and gasoline engine, or 20% for an electric plant. Installa- tion costs about 5% of the equipment cost. Protection, in the way of a house, costs somewhere in the neighborhood of $40 or .$50 for an ordinary sized plant as usually constructed. On esti- mates of costs, freight and hauling must also be included. Fixed charges are usually figured thus: Gasoline Electric Plant Plant Depreciation and 8% 5% Repairs and maintenance 3% 1% Interest at annual rate of 6% 6% Attenda
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