A Treatise on Economy of Fuel; Showing How It May Be Attained on Board Men-Of-War Steamers. and Pointing Out the Considerations Which Should Be Carefully Studied When Engines Are Being Ordered for Steamers-Of-War, Mail Packets, or Merchant Ships
A Treatise on Economy of Fuel; Showing How It May Be Attained on Board Men-Of-War Steamers. and Pointing Out the Considerations Which Should Be Carefully Studied When Engines Are Being Ordered for Steamers-Of-War, Mail Packets, or Merchant Ships
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. 1852 Excerpt: ...her port under sail, or on the most economical cam. Of course, after circumstances of wind and weather may necessitate a departure from the orders; but the naming of any day, step, or speed, will have given the captain a fair criterion by which he may judge of the urgency of his orders. 60. Example 2. It has been ...
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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. 1852 Excerpt: ...her port under sail, or on the most economical cam. Of course, after circumstances of wind and weather may necessitate a departure from the orders; but the naming of any day, step, or speed, will have given the captain a fair criterion by which he may judge of the urgency of his orders. 60. Example 2. It has been stated that if the presence of a steamer is required at a given place by a given day, this table will inform the admiral what day she should be started, in order to reach the port with the minimum expenditure of coal. The following Example is given as being slightly more complicated than the above. Example 2. Important despatches are expected to arrive at from England, by the mail packet, on the 10th of June, and the admiral intends to send a steamer to meet the packet, and to return to him at full speed: required to know how soon she must start before the 10th, so as to arrive there on that day, and what step of expansion must be used on the first trip, so that she shall be able to return instantly at full speed; the fuel is 300 tons. The distance is 1200 miles? Ans.--The trip back at full speed will cost (see table p. 48) 12 X 16-6=199 tons, leaving 100 tons for the first trip, which may be consumed on the fourth step, using eighty-seven tons; leaving a reserve of only thirteen tons, and requiring the steamer to start on the 4th June; or on the fifth step, using only sixty-three tons, leaving a reserve of thirty-seven tons, and requiring the steamer to start on the 3rd June. It is evident, therefore, that if the steamer is detained after the 3rd or 4th, she would only succeed in reaching her port on the 10th by going at a greater speed, on a lower grade of expansion; and having consumed more coal, would find a deficiency on the homeward trip, whi...
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