Specifications for Triple-Expansion Triple-Screw Propelling Engines with Boilers & Auxiliary Machinery for a Protected Cruiser, No. 12, of about 7,350

by U.S. Bureau of Steam Engineering

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. 1890. ... corrugations of adjacent furnaces will be made to alternate. They must be perfectly circular in cross-section at all points; they will be flanged and riveted to combustionchamber plates, and will be riveted to flanges of front heads. For the double-ended boilers, 15 feet 6 inches diameter, they will be inch thick and 3 feet least internal diameter, and 3 feet 7 inches greatest external diameter. For the double-ended boilers, 11 feet 8 inches diameter, they will be, inch thick and 3 feet 6 inches least internal diameter, and 3 feet 10 inches greatest external diameter. For the single-ended boiler they will be % inch thick and 2 feet 9 inches least internal diameter, and 3 feet 1 inch greatest external diameter. 105. ORATE BARS AND BEARERS. The grate-bars will be of wrought-iron, of approved revolving or shaking pattern. They will be so fitted that they can be readily worked under forced draft without opening the furnace or ash-pit doors, and without allowing an escape of air or gases. They will also be so fitted as to be readily removed and replaced without hauling fires. The bars at sides of furnaces will be made of castiron to fit the corrugations. The bearers will be made of wrought-iron, supported by wrought-iron lugs bolted to the furnace-dues, and perforated so as to allow the air to reach all parts of the grate-bars. 10'. BRIDGE-WALLS. They will be made of cast-iron, so fitted as to be readily removable. They will extend back to the back of combustion-chambers so as to leave no place behind them where dirt can accumulate. They will be finished with fire-brick or other approved refractory material. 107. FURNACE-FRONTS. They will be made with double walls of wrought-iron, bolted to a light frame. The upper part of the inner plate of furnace-front wil...

32 pages, Paperback

Published February 4, 2012