Motive Powers and Their Practical SelectionLongmans, Green, and Company, 1894 - 257 páginas |
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Página 20
... lbs . , which for intermittent work may be increased towards 25 lbs . The speed at which a man will turn a crank is from 26 to 30 revolutions per minute . Man Labour . The labour of one man is just SECTION II CHAPTER VI MANUAL POWER,
... lbs . , which for intermittent work may be increased towards 25 lbs . The speed at which a man will turn a crank is from 26 to 30 revolutions per minute . Man Labour . The labour of one man is just SECTION II CHAPTER VI MANUAL POWER,
Página 23
... speed of a strong draught horse may be taken at 3 miles per hour . Oxen do not walk more than 11⁄2 miles per hour . The following table will show animal work done at va- rious speeds of movement . MAXIMUM POWER OF A HORSE IN TOWING ...
... speed of a strong draught horse may be taken at 3 miles per hour . Oxen do not walk more than 11⁄2 miles per hour . The following table will show animal work done at va- rious speeds of movement . MAXIMUM POWER OF A HORSE IN TOWING ...
Página 24
... speed , a horizontal pinion , which oper- ates a shaft . This shaft has a flexible joint connected to it , and may be made of any suitable length . As the motion of animals is so slow , it is necessary to have extra multi- plying gear ...
... speed , a horizontal pinion , which oper- ates a shaft . This shaft has a flexible joint connected to it , and may be made of any suitable length . As the motion of animals is so slow , it is necessary to have extra multi- plying gear ...
Página 28
... speed , upon surfaces exposed to it . This pressure is made use of in the sails of vessels for propulsion , and in the angular sails of wind- mills for obtaining a rotary motion . A plane surface exposed angularly to the wind pressure ...
... speed , upon surfaces exposed to it . This pressure is made use of in the sails of vessels for propulsion , and in the angular sails of wind- mills for obtaining a rotary motion . A plane surface exposed angularly to the wind pressure ...
Página 31
... speed , and power of windmills to be calculated : To find the horse - power developed by a windmill : V = velocity of wind in feet per second ; A = total area of all the sails in square feet ; Effective horse - power = AX V3 1,080,000 ...
... speed , and power of windmills to be calculated : To find the horse - power developed by a windmill : V = velocity of wind in feet per second ; A = total area of all the sails in square feet ; Effective horse - power = AX V3 1,080,000 ...
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Términos y frases comunes
50 feet adopted amount ampères apparatus arranged average belt calculation cast-iron cent CHAPTER chimney coal compound engine condensation Cornish boilers cost crank cubic feet cubic foot cylinder Diam driving dynamo economy effective horse-power electric equal evaporated exhaust steam fall feed-water feet per minute flues fuel furnace gas-engine gine given grate area Heads in Feet heating surface HORIZONTAL ENGINES Horse horse-power per hour imperial gallons inch diameter indicated horse-power iron lamp Lancashire Lancashire boilers length Load machine machinery mill motive power motor nominal horse-power oil-engine Pelton Wheel pipes piston plates portable portable engines pounds practical proportions pump purposes quantity of water Revolutions per Minute shaft single-cylinder sizes space speed square feet square foot square inch steam-engine Stroke suited supply temperature thickness tubes turbine valve vary velocity vertical engine volts water-wheels Watts weight wheel Width wind windmill ΙΟ
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