, which will be described in detail in the near future,1 this part of thecasting is cooledjust as quickly asthe remainder.The result is aharder casting,although onewhich is readilymachined sincet h e hard spotsare not localized.The bores arefinally finishedby honing. Thehoning tool,which finally… … reamer, exceptthat it has hon-ing stones inplace of thereaming cutters. The crank-shaft is now 214in. in diameterand harder bab-bitt is used inboth the con-necting rods andmain bearings.Individual pres-sure feed-pipesare now broughtfrom the oilingsystem to the cen-ter main bear-ing and the…
Automobiles · Aeronautics
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