Science in Fire-Fighting
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Science in Fire-Fighting

Science in Fire-Fighting


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About the Book

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ... revolving with sufficient frequency to drive an impeller at speed great enough to insure efficient operation. This should not prove impossible of development with a many-cylinder, short-stroke motor. There is no principle of mechanics opposed to the development of a pump of this type that will satisfactorily meet the requirements of fire service. Viewed entirely from the domain of reason, it seems that such a pump capable of meeting the requirements could be assembled by connecting a high speed, short stroke motor to an impelleer of the greatest diameter that can be conveniently carried on a chassis, the pitch of the blades of such impeller being cast most favorably to slow motion. Matters of design, however, will have to be determined by experiment. And these experiments may prove more expensive than manufacturers can reasonably be expected to undertake, in view of the poor requital which success would be likely to bring. GEAR PUMPS The gear pump is a modern development of rotary. It possesses, in addition to some admirable qualities, the defects of the rotary. The qualities of this pump that recommends it, are low first cost, lightness, compactness, reliability and low upkeep. Low efficiency, due principally to slippage, and great vibration, due to the necessary pounding of the water gears, constitute its most marked defects At the present state of the development of pumps, for operation in connection with the type of internal combustion engines used on traction motors, the gear pump is less objectionable than the reciprocating or centrifugal types. In other words, it is the most suitable pump for fire service now on the market. This, however, should be regarded as an indictment of the other types rather than an indorsement of the gear...


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Product Details
  • ISBN-13: 9781230291000
  • Publisher: Theclassics.Us
  • Publisher Imprint: Theclassics.Us
  • Height: 246 mm
  • No of Pages: 70
  • Spine Width: 4 mm
  • Width: 189 mm
  • ISBN-10: 1230291008
  • Publisher Date: 12 Sep 2013
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 141 gr


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