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Show WORK OF FLYWHEEL EXPERT. Only One Man Engaged In This Form of Insurance. Only one coinpanj issues fly wheel insurance, because onl:1 onu man can write it. He Is monarch of all his inspectors in-spectors survey: his right there Is none to dispute. Twp years ngo he was a professor In a small engineering engineer-ing college with some theories and figures of his own about flywheels. Ills success Is Inn 'y duo to his own formula, for nVvheol Insurance Is almost pure niathcmntlcs. When a wheel Is revolved at a high enough speed the centrifugal force exceeds the centripetal and the wheel (lies apart Solid cast iron explodes when the speed n (hn rim Is, roughly, threr miles a mini' p. A thiol' rim explodes just as easi is a thlr ono of the samu mntcrla' Wood explodes at a greater speed, jointed Iron at unless. The underwriter allows a rim speed of a mile a minute, one-third the explosion ex-plosion rate, as a sofa limit for solid Iron wheels. This permits a two foot pulley wheel sixteen revolutions a second, sec-ond, while it keeps a sixteen foot flywheel fly-wheel down to two. A jointed wheel Is allowed still less. Tho underwriter has only to name the number of revolutions revo-lutions he authorizes, and to proportion propor-tion his premium to the size of the wheel. The larger the wheel, ot course, the more destructive its explosion. ex-plosion. I wslle's Magazine. |