Specifications for two horizontal direct-acting triple-expansion screw-engines for cruisers nos. 4 & 5 of 4,083 tons displacement, the engines with ... of 10,500 i.h.p. under forced draught - Softcover
Synopsis
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. 1887 Excerpt: ...G., and will be swelled to 2 inches external diameter at the front ends. They will be expanded in tube-sheets at both ends aud beaded over at combustionchamber ends. The stay-tubes will be J inch thick, upset at both ends to 2jj-inches external diameter, leaving the internal diameter as in the remainder of the tube, then swelled at the front end to 21 inches external diameter. They are to be threaded parallel at combustion-chamber cud, and tapering at front end, to fit threads in tube-sheets. They are to be screwed into the tube-sheets to a tight joint at front end. The combustion-chamber ends will be made tight by expanding and blading. All expanding is to be done by approved tools. BOILER-BRACING. Each boiler will have thirty-one steel stays from head to head, all with nuts on inside and outside of heads. The five braces adjoining the stop-valve will be 2T inches in diameter, Avith 2-inch threads, and the other braces 2 inches in diameter, with 2f-inch threads. There will be at each end of each boiler six 1-inch stays running diagonally from the head to lower plate of combustion-chamber, with l-inch threads at ends, nutted inside and outside. These nuts will bear on beveled wrought-iron washers riveted to both sides of plates. There will also be, at each end, from head to combustionchamber, eight 1-j-inch stays, each with double and single eyes and pin-coupling near the back end. These stays will be secured to the heads in the same manner as those last described, but will be screwed into the tube-sheets, and each will have a nut in the combustion-chamber, set up on a washer riveted to tube-sheet. There will also be at each end of each boiler two diagonal 1-inch stays, secured to head in the same manner as above, but flattened and riveted to boiler-shells,...
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