Report of the Hohenstein Boiler and Liquid Fuel Boards; Showing Relative Evaporative Efficiencies of Coal and Liquid Fuel Under Forced and Natural Draft Conditions as Determined by an Extended Series of Tests Made (Paperback)

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. 1902 Excerpt: ...steamer Mariposa, leaving San Francisco at 10 a. m. July 15, 1902, for the round trip to Tahiti. In accordance with the instructions of the Bureau, I took two sets of indicator cards each day, making 4-5 sets in all, the data of which were worked up. There have been no tests to determine the evaporative efficiency of the two main double-ended boilers used on the run, and 1 regret to report that the chief engineer of the ship was unable to improvise any apparatus by which the amount of feed water could be determined with accuracy enough to give data of any value. The amount of oil is a matter of much importance, since the tanks hold barely enough to make the round trip and but one day's supply of coal is aboard. The oil was measured first by the amount pumped into the two settling tanks, as shown in inches on the scale back of the gauge glasses on the tanks; second, this amount was checked by the number of inches used out of each tank for each watch; third, another check, and the one considered most accurate as dealing with large quantities and small errors, was by sounding the tanks from time to time and comparing the amounts taken out with the expenditures in the log. The latter method gave a correction which was applied to the daily log, increasing the daily expenditure slightly, as summed up by inches in the settling tank. The most careful inspection at Tahiti failed to show any bad effect of the flame upon the boilers. No leaks nor defects developed anwhere about them and there was no difficulty at any time in feeding them. As I was ordered to the Boston immediately on my arrival at San Francisco, I lost the opportunity of again inspecting the boilers, but no defects showed from the outside. At Tahiti the tubes were swept by tube scrapers, and back conn...