. American engineer and railroad journal . eefurnaces. The total grate area is 868 sq. ft., and the heat-ing surface sq. ft. ; the ratio of grate area to heat-ing surface is i : The working pressure is 155 lbs. The coal capacity is 850 tons on normal displacement,which gives the ship a cruising range of about 3,000 knotsat full speed and of 10,000 knots at a lo-knot speed. On the trial trips the engines of the Edgar developed10,178 with natural draft. With forced draft, on afour hours trial, they averaged 13,101 , and gave theship an average speed of 20 97 knots an hour.
. American engineer and railroad journal . eefurnaces. The total grate area is 868 sq. ft., and the heat-ing surface sq. ft. ; the ratio of grate area to heat-ing surface is i : The working pressure is 155 lbs. The coal capacity is 850 tons on normal displacement,which gives the ship a cruising range of about 3,000 knotsat full speed and of 10,000 knots at a lo-knot speed. On the trial trips the engines of the Edgar developed10,178 with natural draft. With forced draft, on afour hours trial, they averaged 13,101 , and gave theship an average speed of 20 97 knots an hour. The boil-ers gave much more satisfactory results than in some otherships lately tried, showing no signs of weakness underforced draft. The artificial draft is on the closed stoke-hold system. The cruisers of which the Edgar is a type are lightervessels than the .VVa/ York of our own Navy, having noarmor belt. They might rather be classed with the fastcruiser No. 12, having nearly the same displacement. 178 THE RAILROAD AND [April, 18(^ Vol. LXVI. No. 4] ENGINEERING JOURNAL. 179 although they are 30 <• shorter. The Edgar, moreover,has only two screws, and about two-thirds the enginepower of No. 12. The Edgars armament is also some-what heavier in calil)cr. as the in. guns are heavierthan any No. 12 will carry. The two ships will have aboutthe same cruising range, but No. 12 is expected to be thefaster boat. The Edgar has two masts, with fore-and-aft rig ; thereare no fighting tops. She is a very handsome vessel inappearance, the lines being fine, while the ship is freefrom the various erections on the upper deck with whichsome of the French cruisers are disfigured. ROLLING STOCK FOR NEW ZEALAND RAILROADS. In the accompanying illustrations, for which we are in-debted to liiiiiis/rits, figs, i and 2 show the type of loco-motive designed by Mr. J. P. Maxwell for the New Zea-land Government Railroads. A perspective view of the The valve-gear is outside, and is of the Wa
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
