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"TAE MARINE REVIEW 23 TURBINIA. . 1894, Fig. 2. VARIOUS STEPS IN THE DEVELOPMENT: OF THE STEAM TURBINE FOR MARINE KING EDWARD /90/ STEAM CONSUMPTION OF TURBINES. . 4 STEAM PRESSURE 150 LBS. SQ. INCH, VACUUM AT Fig.1. FULL LOAD 27 INCHES, AT HALF LOAD 27% INCHES, 'os AT QUARTER LOAD 28 INCHES, BAROMETER 30 INCHES. Ss & ~ > a s. Per Kilowatt -Hour R S oo (9614.4) 4200 Nominal Power of Machine Kuowatts. THE QUEEN. 1903. PROPULSION. VICTORIAN & VIRGINIAN. 1904. CARMANIA. 1906. -- (9614.8) Fig 8 about 105,000 gross tonnage and 235,000 Eo Ps eo The following table will perhaps best represent the various steps in the adop- tion of the turbine engine for commer- cial purposes: 4 Cunarders Lusitania and Mauretania, of 785 ft. length, 45,000 tons displace- ment, and 70,000 I. H. P. each. As regards war vessels, the destroyers Velox and Eden were the next vessels following the Viper to be built for the Gross Approx. Year Name of Vessel. Owner. Dimensions. Tonnage. I. H. P. built. King Edward Turbine Steamers, Ltd.........250x30x17% 562 3,500 1901 The Queen S.°E. & Chatham Ry. Co:.....310 x 40x 25 1,676 . 7,500. ~ 1903 Virginian and Victorian Messrs. J. & A. Allan.......520 x 60x 41 10,754 12,000 1904 Carmania Cunard Steamship Co., Ltd....678x 72x 52 19,524 21,000 1905 Lusitania and Mauretania Cunard Steamship Co., Ltd....785x88x60% 33,000 70,000 Now - : about - building Fig. 2 shows, in a diagrammatic form, the comparative sizes of the various steps in marine propulsion. The pro- file of the vessels shown are to the same scale, beginning with the Turbinia of 100 ft. in length, 44 tons displace- ment, and 2,000 I. H. P., to the express British admiralty. These two vessels were fitted with additional engines for obtaining economical results when cruis- ing at low speeds. The next vessel to be fitted with tur- bines for the British admiralty was H. M. third-class cruiser Amethyst. This new construction of the Steam from boilers. Main regulator valve. Steam to H.-P. turbine. H.-P. turbine. : Exhaust from H.-P. turbine to automatic closing-valve. Automatic closing-valve, L.-P. turbine. Exhaust to condenser, Condenser. Astern turbine. Air-pump. > Main inlet to circulating pump. Circulating pump. Circulating discharge to condenser. Condenser discharge overboard. Maneeuvring valve, L.-P. ahead. Steam to L.-P. ahead. Manceuvring valve, L.-P. astern. Steam to L.-P. astern. Governor-valve. Vacuum augmentor, Vacuum augmentor condenser, ZecHeFovozEerRaros HHOMP vessel was also fitted with cruising tur- bines, and the results of the trials as compared with sister vessels ordered at the same time as the Amethyst and of the same dimensions and lines, but fitted with reciprocating engines, demonstrated the economy of the Parsons marine tur- bine as fitted in this class of vessel, and more especially at the higher powers. H. M. battleship Dreadnought is one of the latest war vessels to be fitted with turbine engines. This vessel's tur- bines which were manufactured by the Parsons Marine Steam Turbine Co., Ltd., at the Turbinia works, have now been in- stalled, and the vessel is being prepared for trials. Particulars are given in the memorandum of the navy program of various war