File:A manual of marine engineering- comprising the design, construction, and working of marine machinery (1907) (14579819209).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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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
Text Appearing After Image:
Fig. 6.—Oscillating Engine—Section tbrougli Trunnions. a horizontal engine, set at an angle so as to suit the height of the shait atone end and the frames of the ship at the other. It takes up a largeamount of space in a fore and aft direction, but not so much in the athwart-ship direction as either the oscillating or side-lever type, and for this reasonno doubt, and because it is somewhat heavier and more expensive than the MANUAL OF MARINE ENGINEERING. other forms of paddle engine, it had not found so much favour withengineers. It is, however, a very convenient form when space is not anoliject in design, especially with large powers in light draught vessels, as theweight is not so much concentrated, and the strains are in a direction wherethe natural structure of such ships is best calculated to resist them. Forthese reasons this form of engine is now adopted generally in the fast riverand cross-channel steamers. In some ships of very light draught, the

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