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a ' A. Steam from boilers. . L.-P. turbine. H. B. Main regulator valve. J. CO. Steam to H.-P. turbine. K. Condenser. D. H.-P. turbine. L. Air-pump. E. Exhaust from H.-P. turbine to L-P. M. turbine. N, F..L-P. turbine. 0. Q@. Exhaust from 1.-P. turbine to L.-P. P turbine. Q vessels which are at the present time being' built, some of which are now near- ing completion. Comparisons of the 'earning powers of turbine vessels have been made from time to time with similar vessels on the same respective routes which have been found to be favorable to the turbine, and in. some cases the saving in coal is very considerable. A full account of these comparisons will be found in the "Transactions of the Institution of Civil Engineers;" "The Steam Turbine," by the Hon. C. A. Par- sons and G. Stoney; and in the "Trans- actions of the Liverpool Engineering So- ciety;" "Progress Made in the Applica- tion of the Parsons Turbine to Marine Propulsion" by R. J. Walker. By the courtesy of Monsieur Pier- rard, of the Belgian government, par- 3 SHAFT ARRANGEMENT OF TURBINE MACHINERY IN SERIES. . Exhaust to condenser. Pp Main inlet to circulating pump. . Circulating pump. 0. Circulating discharge to condenser. . Discharge overboard. -- Q. Astern regulator valve. TAE Marine REVIEW O N \ M . Steam to astern turbine. . Astern turbine. . Cruising regulator-valve. . Steam to cruising turbine. . Cruising turbine. Exhaust from cruising turbine to auto- matic closing-valve. . Automatic closing valve. ® 2scHan fig. 7. 4 SHAFT ARRANGEMENT OF TURBINE MACHINERY oO (96 14,E.) Phe. CoM. Ae a, Total number trips. 134 132 106 44 Mean dur. of trip. 185'2 21075 20674 20274 Mean con. per trip.22.71T 23.22T 24.27T 24.87T Mean Boat. Steamers. results Turbine Paddle Total number of trips..... 216 1070 Mean consumption per trip. 24.06T 24T Mean duration of trip..... 185'9 215'4 From the above table it will be seen that the turbine boat does the passage in about 15 per cent less time than the paddle steamers on the same coal con- sumption. To reduce the turbine boat to the displacement and speed of the paddle boats, and assuming that the I. H. P. varies as the cube of the speed, the mean consumption of the Princesse Elisabeth would be about 17 tons, as against 24 tons in the paddle boats, thereby showing a saving of over 25 per cent. The following mercantile vessels have been completed and placed on service this year: The pleasure for the. British and mail steamer Rewa India Steam Navigation M yee -------- 0 V. I.-P. cruising turbine. : . Exhaust from I.-P. cruising turbine to self-closing valve. . Self-closing valve. . Direct steam-regulator valve to I.-P. cruising turbine. . Direct steam to I.-P. cruising turbine. . Exhaust from H.-P. cruising turbine to self-closing valve when engine- rooms are independent. 6 Self-closing valve. an xm = Co., Ltd., of 455 ft. by 56 ft and 16% knots speed; the new Clyde passenger steamer Duchess of Argyll for the Cal- edonian Steam Packet Co., of 250 ft. by 30 ft. beam and 20 knots speed; the Thames passenger steamer Kingfisher for i ; ilers. M. Steam to H.-P. astern turbine. ticulars are just to hand of the first % Meivesulator valve. N. H.-P. astern turbine. ' 1 s C. Stearn to H..P. turbine. OQ. Exhaust from H.-P. astern to L.-P. season's running of the turbine steamer p. --P. turbine. ae _ aster turbine. i j P. -P. . L.-P. astern turbine. Princesse Elisabeth, on the Ostend and "a coroe rea ee Q. Regulator valve to H.-P. cruising : oe : F, L.-P. turbine. turbine. ae pets: Dover service, and are given in the fol- -- G! Exhaust to condenser. R. Steam to H.-P, cruising turbine. : : : H. Condenser. S. H.-P. cruising turbine. | : lowing table, along with the particulars J. Air-pumps. T. Exhaust from H.-P. cruising turbine ee : K, Circulating pump. * to self-closing valve. of similar vessels on the same service L. Astern regulator valve. U. Self-closing valve. but fitted with paddle engines: Princesse Princesse Marie Leopold : Elisabeth. Clementine. Henriette. Ty, Length between perpendiculars ........... Miele se 104m.85 103m.70 -103m.70 103m.70 Bieadte Poses cs sss ens 3° vase cece eescesncees 12m.192 11m.58 11m.58 11m.58 ag GAC eel ag oo es hog ee oo Giee cacclee © 2m.92 2m.85 2m.82 2m.82 Displacement in metric' tons.......... Peae RG» ic 2005 1853 1847 1829 Bem CH LONG ek oo since. leis wesw te ete s css « - 1747Tx 1474Tx 1450Tx 1375Tx aype ot engines... .... Re ies esse es seeeeeseeees Turbines Compound Compound Compound peed On trial .7 0.7... 6s hs ee es Mie cece oes os oe 24n, 22n.187 22n.2 en Ooms Wate Or CONStEuchiOn 64%. s650< +. «o> ee nena toes 1905 1896 1893 1893 In the year 1905 the mean consump- tion of coal per single trip and the mean time per trip from Ostend to Dover and vice versa of the four preceding vessels were as follows: Pow Po Ce Me WL ar Total number trips. 82 278 278 232 Mean dur. of trip. 187' 217! 212" 227! Mean con. per trip.23.01T 24.05T 23.82T 24.30T For the first six months of the year 1906 the corresponding results were the following: the General Steam Navigation Co., 275 ft. by 32 ft. and 20 knots speed; the three cross-channel steamers for the Great Western Railway Co.'s new route, Fishguard to Rosslare, viz. St. David, St. Patrick and St. George, of 350 ft. by 41 ft. by 13 ft. 6 in. and 22% knots