File:A manual of marine engineering- comprising the design, construction, and working of marine machinery (1907) (14580000177).jpg

Identifier: marineen00seatmanualofrich (find matches)
Title: A manual of marine engineering: comprising the design, construction, and working of marine machinery
Year: 1907 (1900s)
Authors: Seaton, Albert Edward, 1848-1930
Subjects: Marine engineering
Publisher: London, C. Griffin and company, limited New York, D. Van Nostrand co.
Contributing Library: University of California Libraries
Digitizing Sponsor: MSN

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ts. It can be arranged with the cylinder vertical in its mean position,or inclined even as far as the horizontal position; it will work best, ofcourse, in the former position, and the chief objection to its more frequentadoption in shallow draught steamers is the want of room vertically to effectthis. It is not so convenient a form when steam of higher pressure isemployed, from the difficulty of getting an efficient apparatus for an earlycut-ofl of steam, and the liability of the trunnion to leak ; the former is thereal difficulty, the latter existing more in imagination than practice, and thesolution has been found in the introduction of compound cylinders. The 6 MANUAL OF MARINE ENGINEERING. most successful oscillating engines, however, have been those of large power,working with a steam pressure not exceeding 30 lbs. per square inch, andconsuming on the average 2f lbs. of coal per I.H.P. per hour; and as theyhave been, and are likely to be, only fitted in ships where consumption of
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Fig. 5.—Steeple Engine. coal is not of first importance (as in fast passenger steamers on shortvoyages, and in yachts on similar service), it seems wise to avoid the higherpressures, especially as with them the cost and weight of machinery ismaterially increased. The inclined position of cylinder has been adopted in INTRODUCTION—DIAGONAL ENGINE. 7 fast, shallow draught steamers and naval tug boats with success; and toget over the difficulty caused by the large space athwart-sliips required bythis type of engine with two cylinders, one cylinder has been placed beforethe shaft and the other abaft it, both operating on the same crank. The Diagonal or Inclined Direct-acting Engine, the invention of MarkIsambard Brunei, in 1823, is one that, although not therefore new, was not80 much adopted in former years as it has been latterly. It is simply

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