Steam turbines; a practical and theoretical treatise for engineers and students, including a discussion of the gas turbine . gether withthe great range of expansion which is possible with the steamturbine. It is difficult to say what developments the future will bringin the applications of steam and gas turbines to the marineservice. Practically all the new battleships and cruisers for theBritish navy are now turbine driven. If we consider that thesteam turbine in its practical form commenced its real develop-ment only in 1885, the future certainly may have rich possibilities. Fig. i85i repres


Steam turbines; a practical and theoretical treatise for engineers and students, including a discussion of the gas turbine . gether withthe great range of expansion which is possible with the steamturbine. It is difficult to say what developments the future will bringin the applications of steam and gas turbines to the marineservice. Practically all the new battleships and cruisers for theBritish navy are now turbine driven. If we consider that thesteam turbine in its practical form commenced its real develop-ment only in 1885, the future certainly may have rich possibilities. Fig. i85i represents the results of tests made at variablespeeds and powers on a standard combined impulse and reactiontype of turbine. In explaining the results of these tests T. Herr * states that investigations now under way by the Westinghouse interests will insure the elimination in the nearfuture of the reciprocating engine in the field of marine propul-* Journal of the Franklin Institute, March, 1913. BLEEDER OR EXTRACTION TURBINES 341 in the stage; those not throttled would be either closed offentirely or else wide Fig. 185CL Ring Valve of Curtis Bleeder Turbine.


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