. American engineer and railroad journal . Fitted with air brakes *0 Engines in service 35,025 Equipped with power brakes 34,637 New equipment, other than passenger, under contract or construction: Freight cars to be fitted with air brakes 62,623 Freight cars not to be fitted with air brakes 0 Engines to be equipped with power brakes 1,298 Engines not to be equipped with power brakes 0 A contract has been placed for sleeping cars to run on theelectric line between Cincinnati and Columbus, O. 876 AMERICAN ENGINEER AND RAILROAD JOURNAL. THEORY OF LOCOMOTIVE WATER-SCOOPS. By Professor I. P
. American engineer and railroad journal . Fitted with air brakes *0 Engines in service 35,025 Equipped with power brakes 34,637 New equipment, other than passenger, under contract or construction: Freight cars to be fitted with air brakes 62,623 Freight cars not to be fitted with air brakes 0 Engines to be equipped with power brakes 1,298 Engines not to be equipped with power brakes 0 A contract has been placed for sleeping cars to run on theelectric line between Cincinnati and Columbus, O. 876 AMERICAN ENGINEER AND RAILROAD JOURNAL. THEORY OF LOCOMOTIVE WATER-SCOOPS. By Professor I. P. Church, Cornell University. For simplicity it will be assumed that the result is the sameIf the locomotive is stationary, while the main trough of waterand its contents move underneath it with a velocity (uniform)equal to that of the locomotive in the actual case. Let thisvelocity be denoted by c. First Case.—Open Trough. Let the scoop and channel be an open trough, so that thedepth of the stream of water proceeding upward along it is. First Case—Open Pipe. free to adjust itself in accordance with the dynamic relationsof the flow. It Is well known that if a block be started with a velocity, c,■Jong a smooth and fixed guiding surface inclining upward, it c«will not come to rest until a vertical height h = — (g being 2gthe acceleration of gravity, = for the foot and second)above the initial point has been reached; also that at a heighth (less than h) above the starting point the velocity will havediminished to a value, c, satisfying the relation c c8 — = h (1) 2g 2gIn the case of a great number of successive blocks, or waterparticles, when an even or steady flow takes place up theopen trough, the effect of a diminished velocity is to producea thickening, or increase of depth (if width of trough is uni-form) of the stream in accordance with the law Fc = Fc (2) Where F is the sectional area of the stream at the bottom(see Fig. 1), and F that at A, at any height h;
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
