. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . f Berlin are developing a 2,500-hp. piston locomotive featuring the Loeffer system. Inthis system the combustion chamber is surrounded by tubesin which saturated steam at 1,420 lb. pressure is circu- motives of various sizes. J. A. Maffei, of Munich, joinedthis group but along lines independent of either Ljung-strom or Zoelly. Last year saw the completion of allthese locomotives, so that they are now either in regularservice or under test. The 2,000-hp. Krupp-Zoelly type locomotive in the fal
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . f Berlin are developing a 2,500-hp. piston locomotive featuring the Loeffer system. Inthis system the combustion chamber is surrounded by tubesin which saturated steam at 1,420 lb. pressure is circu- motives of various sizes. J. A. Maffei, of Munich, joinedthis group but along lines independent of either Ljung-strom or Zoelly. Last year saw the completion of allthese locomotives, so that they are now either in regularservice or under test. The 2,000-hp. Krupp-Zoelly type locomotive in the fallof 1926 had been brought to a full commercial standardami was ready for its acceptance test by the German Rail-ways, for which system the locomotive had been built. Henschel & Sons development has been along somewhatdifferent lines, namely, the utilization of the exhaust steamfrom a piston locomotive in a turbine drive. A 1, railway locomotive is used for this purpose. Thetender, however, is entirely new, providing as it doesturbine drive, condensers and coal bunker. This general. Ljungstrom Steam Turbine Locomotive in Service on the Swedish State Railways lated at high velocity by means of a steam pump, the re-sulting highly superheated steam being used in part di-rectly in high pressure cylinder and the balance returnedto the drum from which it was drawn for the purpose ofgenerating additional steam. Exhaust from the high pres-sure cylinder is discharged to a large receiver against amaximum pressure of 257 lb. From this receiver thesteam is re-superheated on its way to the low pressurecylinder. Mr. Wagner, already quoted, is authority forthe statement that a fuel saving of 45 per cent is expectedfrom this locomotive when built. A third high pressure locomotive system is being de-veloped by the Swiss Locomotive & Machine Works ofWinterthur, Switzerland. No details of this system areyet available although it is understood that a test plantis now in operation. The
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