The book A Catechism of the Steam Engine was written by author Bourne John C.E. Here you can read free online of A Catechism of the Steam Engine book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Catechism of the Steam Engine a good or bad book?
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, 3qrs. , 14 lbs; horse power of shaft 88. 4 horses; ratio of shaft to enginepower 1 to 1. 4; slip of the screw 18. 7 per cent. In this experiment thepower utilized was 71 per cent. 586. _Q. _--Was any experiment made to determine the relative performancesin head winds? _A. _--The trial in which this relation was best determined lasted for sevenhours, and was made against a strong head wind and heavy head sea. Thespeed of the Rattler by patent log was 4. 2 knots; and at the conclusion ofthe tri...al the Alecto had the advantage by about half a mile. Owing to anaccidental injury to the indicator, the power exerted by the engines of theRattler in this trial could not be ascertained; but judging from the powerexerted in other experiments with the same number of revolutions, itappears probable that the power actually exerted by the Rattler was about300 horses. The number of strokes per minute made by the engines of theRattler was 22, whereas in the Alecto the number of strokes per minute wasonly 12; so that while the engines of the Alecto were reduced, by theresistance occasioned by a strong head wind, to nearly half their usualspeed, the engines of the Rattler were only lessened about one twelfth oftheir usual speed.
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