Salt Lake Telegram | 1917-12-02 | Page 6 | Careless Driving Worst Tire Menace

I I CARELESS DRIVING i II WORST TIRE MENACE Sharp Turns Put T Terrific Side Strain on Weakest Part of Tire I The side of Jf tires are re purposely i I made lighter thinner and tian the center II part In order that they yield the greatest I amount mount of flexibility and buoyancy yet I the re reckless l driver fails to appreciate this and when his tires do not give the full fun I amount of mileage e be lie expects he seldom stops to to consider his destructive methods I of driving says L. L C. C Moore manager managerI of the local branch of the Federal Tire I company I I Taking turns turns' ansi and corners comers at an unreasonable unreasonable Unreasonable un Un- II reasonable speed is one Of the worst ways a driver can treat tires for a a. terrific side strain is thrown upon the thin walls of the two tires on the outside of the turn which tears and pulls puns the fabric at its weakest point Recently a prominent professor who is head of the department of elf t engineering in one of the leading universities made a a. series of tests to ascertain the exact strain in pounds that is exerted on the side walls when the car takes a curve at various speeds He finds that with a a. car weighing 2500 2300 pounds taking a curve of fifty feet radius at four miles an hour no I noticeable strain is exerted upon any of I Ithe the tires as the centrifugal l tendency of i ithe the motion is at its lowest ebb or is lost or absorbed owing to the slow speed of the car However if the car Cal takes the I same curve at twenty miles an hour not only is most of the actual weight of the pound 2500 car thrown upon the two outer tir tires s. s but an additional side thrust of about 1330 pounds is created or I pounds upon each tire This means that an extra uncalled for force of nearly I i pounds is pulling jerking straining and tearing the thin walls while at the same sae time practically half hal the weight of the I entire entre car is thrown on each tire