This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1864 Excerpt: ...beams, to the final end of which is attached a spring balance, or scale, which indicates the pressure in pounds; and this pressure being augmented by the number of times the levers are multiplied, gives the total pressure, or thrust on the shaft. And the total thrust being multiplied into the distance moved over in a ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1864 Excerpt: ...beams, to the final end of which is attached a spring balance, or scale, which indicates the pressure in pounds; and this pressure being augmented by the number of times the levers are multiplied, gives the total pressure, or thrust on the shaft. And the total thrust being multiplied into the distance moved over in a unit of time by the vessel, shows the actual power absorbed in propelling the vessel. In the application of the dynamometer, care must be taken that it receives the entire thrust of the shaft before the indication of the scale is noted. Did the propeller and steam piston travel through the same distance in any given time, and were all the power applied to the piston transmitted to the water through the propeller, the total pressure upon the steam piston and the thrust of the propeller would be identical, but since such is never the case, we ascertain the theoretical thrust, thus: Total effective pressure on piston in lbs. x 2 length of stroke in ft. x No. of revols. per min. Pitch of propeller in feet x number of revolutions per minute. = Theoretical thrust in lbs. The difference between this and the actual thrust, shows the amount lost in friction of engines, propeller, and load, overcoming resistance to edge of propeller blades, working pumps, etc The loss from slip is independent of this. Strain upon a Screw PropeUer-blcule. We can best illustrate this by an example. Given, circumference of centre of pressure of a 3 bladed propeller, 30.9 feet; distance from hub to centre pressure 41 inches; pitch 22.5 feet; thrust 12700 pounds: required, the strain upon each blade at the hub. SOLUTION. Let F G H be the development of the helix on a plane, draw B D at right angles to F H, and A E at right angles to G H. Trigonometri cally, we ascertain the a...
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Add this copy of Lessons and Practical Notes on Steam, the Steam Engine, to cart. $21.46, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2006 by University of Michigan Library.
Add this copy of Lessons and Practical Notes on Steam, the Steam Engine, to cart. $21.46, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2006 by University of Michigan Library.
Add this copy of Lessons and Practical Notes on Steam, the Steam Engine, to cart. $24.03, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2006 by University of Michigan Library.
Add this copy of Lessons and Practical Notes on Steam, the Steam Engine, to cart. $26.10, new condition, Sold by Just one more Chapter rated 3.0 out of 5 stars, ships from Miramar, FL, UNITED STATES, published 2005 by Scholarly Publishing Office, U.
Add this copy of Lessons and Practical Notes on Steam, the Steam Engine, to cart. $34.98, new condition, Sold by Ria Christie Books rated 4.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2006 by University of Michigan Library.
Add this copy of Lessons and Practical Notes on Steam, the Steam Engine, to cart. $34.98, new condition, Sold by Ria Christie Books rated 4.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2006 by University of Michigan Library.
Add this copy of Lessons and Practical Notes on Steam, the Steam Engine, to cart. $38.55, new condition, Sold by Ria Christie Books rated 4.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2006 by University of Michigan Library.
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