rhood of 50 at 1650 revolutions, its normalspeed. The cylinders are of cast-iron, turned internallyand externally. The water-jaiicts are attachedto the cylinders by an electrolytic process render-ing them water-tight. The pistons are of special alloys and are ex-Ircmely light. The connecting rods,… … short crank-case to be used, with a resultantiving of weight, without any undue sacrifice ofrength. The crank-case is of aluminum especiallyrengthencd by ribs. Both intake and exhaustlives are of large diameter and mechanically _ a&4
Aeronautics
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