Motive Powers and Their Practical SelectionLongmans, Green, and Company, 1894 - 257 páginas |
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Página 28
... proportion to the space it oc- cupies . A cubic foot at atmospheric pressure weighs 564.8 grains . A ton of air , 2,240 lbs . , thus equals 27,810 cubic feet . The atmosphere extends above us some 50 miles , there- fore each square inch ...
... proportion to the space it oc- cupies . A cubic foot at atmospheric pressure weighs 564.8 grains . A ton of air , 2,240 lbs . , thus equals 27,810 cubic feet . The atmosphere extends above us some 50 miles , there- fore each square inch ...
Página 30
... force of storms would be felt , should be avoided . The great point is to secure a position where the average prevailing winds will be caught freely . Proportions of Windmill Sails . - The following rules en- 30 MOTIVE POWERS .
... force of storms would be felt , should be avoided . The great point is to secure a position where the average prevailing winds will be caught freely . Proportions of Windmill Sails . - The following rules en- 30 MOTIVE POWERS .
Página 31
... Proportions of Sails . - The usual practice in proportion- ing the standard windmill sails was to adopt a length of whip or arm , which was usually 30 feet , and then propor- tion the whip and sails as follows : Length of whip , say 30 ...
... Proportions of Sails . - The usual practice in proportion- ing the standard windmill sails was to adopt a length of whip or arm , which was usually 30 feet , and then propor- tion the whip and sails as follows : Length of whip , say 30 ...
Página 53
... proportions of these have to be de- cided to arrive at a fair comparison . The more free the access of the water to , and the egress from , a water - wheel , the better ; therefore careful attention should be given to proportions in ...
... proportions of these have to be de- cided to arrive at a fair comparison . The more free the access of the water to , and the egress from , a water - wheel , the better ; therefore careful attention should be given to proportions in ...
Página 57
... proportion - as fol- lows , the thickness of sheets being 14 gauge : Diameter of Pipe in Inches . Working pressure per sq . in . , lbs ... Weight per 100 ft . in cwts .. Price per Price foot in shillings .. per foot in dollars ... ∞ 9 ...
... proportion - as fol- lows , the thickness of sheets being 14 gauge : Diameter of Pipe in Inches . Working pressure per sq . in . , lbs ... Weight per 100 ft . in cwts .. Price per Price foot in shillings .. per foot in dollars ... ∞ 9 ...
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amount ampères apparatus arranged B.Sc calculation cast-iron cent CHAPTER Chemistry chimney coal compound engine condensation Cornish boilers cost crank Crown 8vo cubic feet cubic foot cylinder Diagrams Diam driving dynamo economy effective horse-power electric Elementary fall feed-water feet per minute flues ft.-lbs fuel furnace gas-engine gine grate area Heads in Feet heating surface HORIZONTAL ENGINES horse-power per hour horses Illustrations imperial gallons inch diameter indicated horse-power iron length LL.D Load machine machinery Maximum mill motive power motor nominal horse-power oil-engine oxen Pelton Wheel pipes piston plates portable pounds practical proportions published by Longmans pump Revolutions per Minute Science Scientific Works published shaft speed square feet square foot square inch steam-engine Strength of Materials Stroke supply thickness tions tubes turbine valve vaporizer velocity vertical engine volts water-wheels Watts weight wheel wind windmill Woodcuts ΙΟ
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