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. 1899 Excerpt: ...the diagram. Q.--What does each single ordinate show? A.--It indicates the mean effective pressure during the time in which the pencil passes across the space, in the middle of which the ordinate lies. Q.--What is meant by "mean"? A.--If the pressure was 60 lbs. on entering a space and ran down evenly to 55 lbs. on ...
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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. 1899 Excerpt: ...the diagram. Q.--What does each single ordinate show? A.--It indicates the mean effective pressure during the time in which the pencil passes across the space, in the middle of which the ordinate lies. Q.--What is meant by "mean"? A.--If the pressure was 60 lbs. on entering a space and ran down evenly to 55 lbs. on leaving the space, S7/4 lbs. would be the half-way between the two, or the "mean," which may be safely called the pressure all across the space. Q.--After the card has been properly laid out, what should be done? A.--Measure the combined length of all the ordinates, divide their sum by the number of ordinates, and multiply the quotient by the figure on the spring scale in use. Q.--How do you "add" the ordinates? A.--By laying them off in one continuous straight line on a cardboard, then measuring their total length in inches. Q.--Suppose the total length of the ten ordinates were 8 inches and the spring used was a 50 scale, how would you proceed? A.--The eight inches and 10 ordinates equals eight-tenths, or. 8, multiplied by 50 scale equals 40 pound mean effective pressure in the cylinder of engine. Q.--Does the indicator allow for all friction, etc.? A.--Yes. Q.--How are the ordinates measured, when the expansion line drops below the atmospheric line? A.--The sum of the lengths below the atmospheric line is subtracted from the sum of those above. Otherwise the calculation is the same. Q.--What does the scale number on an indicator card mean? A.--It indicates what pressure will lift the pencil point one inch. (See cut, page 156.) Q.--What is meant by mean effective pressure? A--It means the average pressure of steam in the cylinder during one stroke, minus the back pressure. THE COMPRESSED NON-VIBRATING AIR OR STEAM ...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
