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. 1898 Excerpt: ...= 539-8 The consumption is stated by Mr. Adamson to have been, on one particular trial, as low as 1-77 lbs. per H.P. per hour. FOUR-CYLINDER COMPOUND MARINE ENGINES. 165. We conclude this chapter by referring to some fourcylinder compound marine engines, designed by Messrs Maudslay, Sons, and Field, and fitted in the ...
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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. 1898 Excerpt: ...= 539-8 The consumption is stated by Mr. Adamson to have been, on one particular trial, as low as 1-77 lbs. per H.P. per hour. FOUR-CYLINDER COMPOUND MARINE ENGINES. 165. We conclude this chapter by referring to some fourcylinder compound marine engines, designed by Messrs Maudslay, Sons, and Field, and fitted in the vessels of the White Star line of mail-steamers which make the voyage between Liverpool and New York. Similar engines have also been fitted in other vessels. They work to about 5,000 H.P., and exhibit a remarkable economy in the consumption of fuel; presenting, in fact, an admirable practical illustration of the excellence of the system now adopted in powerful steamships. The writer is enabled to present two external views of the engines in question, as well as a section through the cylinders and valves, which latter will give the student a complete insight into the method of distributing the steam. Fig. 126 is a front elevation of the engines; fig. 127 is a side elevation, showing also a section of the vessel; and fig. 128 is a section through the cylinders. But inasmuch as a section perpendicular to the screw-shaft does not take in the valves and steam passages, the drawing in fig. 128 is altered hypothetically, and the valves are supposed to be brought round into the plane of section. In this way one diagram suffices for exhibiting both the working of the valves and the connection of the pistons with the screwshaft. To begin with the smaller, or high-pressure cylinder, which is 48 inches in diameter, with a stroke of 5 feet. Steam from the boiler, at a pressure of 70 to 75 lbs. per square inch, enters the outer slide case on its way to the cylinder. The periods of admission, cut-off, and exhaust are regulated by two valves, one of which work...
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