The following text may have been generated by Optical Character Recognition, with varying degrees of accuracy. Reader beware!

April, 1910 'TAE MARINE. REVIEW : 131 basis of speed. : Tig. 11 shows the water consumption per shaft horsepower of turbines plotted to a basis of revolutions. On the completion of the voyage, Pee the vessel returned to the Turbinia | works, where her reciprocating engine was taken' out, engine seats ré-mod- ly oe G3 - elled, and preparations made for 'the : reception of the turbines and gearing. es z Figs: 12,°13 and: 14 show the general ; arrangement of the turbine machinery and gearing. The only alteration made. to the vessel was in the type of propelling engines; the boilers, propeller, shaft- | the propulsive coefficient plotted to a pi eon =| a A wee ing, and thrust blocks remained the fxs same as for the reciprocating engine. Ler ae a The propelling machinery consists of two turbines in "series," viz., one high pressure and one low presstife, the high-pressure turbine being placed on the starboard side of the vessel and the low-pressure on the port side. At the after end of each of the turbines a driving pinion is connected, with. a flexble coupling between the pinion shaft and the turbine, the pinion on each side of the vessel being geared 'into a wheel, which is coupled"to thé propeller shaft. A reversing turbine is incorporated in the exhaust casing : of the low-pressure turbine. The air, BUNKER circulating, feed, and bilge pumps are of the usual design for tramp steam- ers, and are driven by means. of a crank and connecting rod coupled to the» forward end of the gear wheel 'shaft. The turbine and pinion. shaft bearings are under forced lubrication; similar to ordinary turbine practice. The teeth of the pinions and of the' gear wheel are lubricated by means of a "spray". pipe extending the full width of the face of the wheel. In- dependent oil pumps are fitted for supplying oil to the bearings and gear wheel. With a view to the possibility of experimenting with different lubri- cants for the gear wheel, the oiling system for the bearings is separate from, that of the gear wheel. BUNKER "BUNKER . a me ; ' . "ye ' . YW . ' : ema faire: 2" Fic. 4--Cross-Section oF ENGINE Room. ReEcrprocatinG ENGINES. BUNKER Fic. 5--Serction THROUGH BoILerR: Room STEAMER VESPASIAN. power taken on the progressive trial is also shown, together with the speed corresponding to revolutions taken on ~N. 8 measured mile. Fig. 8 (full lines) shows the water consumption per hour for main en- gines only and for all purposes to a basis of revolutions. The difference between these two curves represents the consumption of steam of steering engine, the exhaust of which was led to a separate measuring tank. Fig. 9 shows the water per in- dicated horsepower also plotted to a basis of-revolutions; and Fig. 10 shows Fic. 6--RESULTS FROM PROGRESSIVE TRIALS. x e ° a Ss Slip Per Cent a wm & So: 5 os.US 'orse Power s S S Q50 é db Q ! peed in Knots