Shipbuilding and Shipping Record . 1913 by the StockholmsRederiaktiebolag Svea. the largest ship-running company in Sweden,for their home coasting trade. A proposal was made by the Ljung-strom Company that the Svea Company should tit, one of the twovessels with their turbo-electric machinery, the LjungstromCompany guaranteeing the following conditions :— 1. On trial the consumption per per hour of the electricallypropelled vessel should not exceed 70 per cent, of the consumptionper of the standard triple-expansion engine of the other vesselunder equal conditions, excepting that t
Shipbuilding and Shipping Record . 1913 by the StockholmsRederiaktiebolag Svea. the largest ship-running company in Sweden,for their home coasting trade. A proposal was made by the Ljung-strom Company that the Svea Company should tit, one of the twovessels with their turbo-electric machinery, the LjungstromCompany guaranteeing the following conditions :— 1. On trial the consumption per per hour of the electricallypropelled vessel should not exceed 70 per cent, of the consumptionper of the standard triple-expansion engine of the other vesselunder equal conditions, excepting that the turbo-electrically-drivenvessel sin mid have the benefit of the reduction in weight of machineryas regards draught, and 2. If, during one years trial, the Svea Company had reason toreject the machinery on account of loss of economy or efficiency, the Ljungstrom Company agr 1 at their expense to remove the turbo- electric machinery and replace same with a set of engines and boilersidentical to those fitted in the other Arrangement of Ljungstrom Turbo-Electric Machinery for Twin-Screw Intermediate Vessel of 21,000 tons , 5,625 shaft horse-power, speed 13 knots. Ljungstrom, a pure reaction turbine, in which the -team Bowsradially through concentric rings of blades moving alternately inopposite directions; the result being that whilst the velocity oialternate rings of blades relatively to each other is high, the speedof rotation is only half that of a turbine consisting oi altemateljfixed and moving rings of blades. Even so. in this type of turbine very hijh speeds of rotation are employed, the turbines rotating at7,200 r. , which is equivalent to a speed of rotation of 1 1,400 r. the usual type of turbine. It is obvious that with speeds oisuch magnitude, although the employment of mechanical reduction?< ii i - almost impossible, if an efficient systi m of : peed reductii ufound, the turbine would prove itsell to be mo I economicalin use. Hence the
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