Page 4 Advertisements Column 2

Hokitika Guardian, 21 May 1925, Page 4

The cause of I lie Diesel Kitgine lias recently received another fillip from an unexpected directiun. The metallurgist lias been taking an increasing interest in this department el marine engineering. and the most important step for some time past lias been the substitution ut' steel for easl iron as the material for Diesel engine crank-eases. The Diesel engine is, by virtue of the I."at cycle oil which it works, a somewhat massive, elute-v ami heavy m.aehiim. From its inception its designers have aimed to reduce the weight by lightening tlte scantlings. Improvement in this direction, besides obviating t'he dillieiilty of heavy ami nil necessary weight, would considerably redltee the hist cost of the machine as well. Provided steel castings of a reliable nature can be obtained at a reasonable price, their substitution for the iron castings ordinarily used means a considerable reduction in weight. For naval work the weight necessary where iron castings are used is altogether prohibitive, so that steel castings mav be

regarded as a necessity for tlie major tty of the parts intended for the strin gent reouiiemeiits ot the .Senior Ser

vice. As manufacturers themselves of both Diesel and Semi-Diesel engines, .Messrs William Beard more and C'o Ltd, the steel manufaeturers. shiphuilders and engineers of Glasgow, have given considerable thought to this problem, and have recently produced several excellent examples of the moulder’s art in the form of Diesel engine crankcases in cast steel. The production of such eastings hy one of the leading lines in the steel industry is of special interest at the present time, when competition between Diesel and steam machinery may he said to he at its height. That the steel foundry man should lie able to stop in and assist the internal combustion engine designer - is very signlieant of the trend of development in this department of marine engineering.

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