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. 1911 Excerpt: ... falling at H. The instrument is then ready for use. When constructed for use in calculating the indicated horse power of the main engines, the various values of log k may, for convenience, be laid off and marked for each end of each cylinder, instead of in the form of a graduated scale. In order to make the diagram ...
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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. 1911 Excerpt: ... falling at H. The instrument is then ready for use. When constructed for use in calculating the indicated horse power of the main engines, the various values of log k may, for convenience, be laid off and marked for each end of each cylinder, instead of in the form of a graduated scale. In order to make the diagram more compact, the base line may also be moved upward, corresponding to the minimum values of P and R that will be obtained in practice. The diagram in Fig. 90 is laid down for a value of fc = 16.8, corresponding to a cylinder 25 inches in diameter and 2-ft. stroke. Brake Horse Power.--This term is generally applied to the horse power actually transmitted to the shaft and is so-called from the hrake which absorbs and measures the power transmitted. Shaft Horse Power is equivalent to the brake horse power, but it is measured in transmission without being absorbed by the apparatus used. This term is used by marine engineers to designate the power delivered to the propeller. The power of a marine turbine, measured by the torsion meter, is shaft horse power. Absorption Dynamometers. The Prony Brake.--This is the most common form of absorption dynamometer. Its construction is simple and it is usually extemporised when needed for the test of an engine. Referring to Fig. 91 two wooden beams are clamped together, c c on a friction wheel carried by the shaft A, by bolts CO. DD are stops to prevent the beam turning through more than a small angle when the shaft is rotated. The long end of the lever G rests on a platform scale, while the short end, F, may or may not carry a hook on which weights are hung to balance the overhanging weight of the long end. Suppose the shaft turning to the left. If the bolts CC be tightened, there is increased friction on the ...
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Add this copy of Experimental Engineering to cart. $62.48, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Santa Clarita, CA, UNITED STATES, published 2010 by Nabu Press.
