Show HAYNES DISTRIBUTOR EXPlAINS BALANCE OF AUTO MOTORS We 0 find that to tho the majority of prospective purchasers rs the balance of an automobile motor is a. a r rather ther vague and misunderstood stood subject says A A. F. F of at the Haynes Motor Car com com- any lany distributor of tho the Haynes Hanes Americas America's Amen Ameri cas ca's first car A balanced motor by bythe bythe bythe the simplest definition is one that runs perfectly smooth without vibration at any speed Technically tho the perfect balance balanco of a motor is obtained when I the resultant centrifugal forces are equal and and hence equal to zero zeron I In n any plane Perhaps the best way to Illustrate the effect of ot unbalanced for forces s is to tie a wel weight v ht to a l string and swing it around the index finger Inger As the weight swings around in the path of a circle the In Index Index In- In dex lox finger Is pulled on by the tho weight and since the wel weight ht Is constantly changing its position tho the pull on the finger ln er changes and the tho finger begins to move so as to describe a small circle The heavier the tho weight and the faster faster faster fast fast- er it revolves the more difficult It Is 19 Isto isto to hold the finger Inger stationary If It a as s second cond weight is tied to a string and fastened to lo the tho same sarno finger so as ns to extend out in the opposite direction from tho the first weight when the tho two arc are swung around the finger in er It will be found that there will be very little or no pull on tho the finger ringer If It the two weights weight are equal The same conditions apply liPpl exactly to the automobile motor If It the weights of tho the arms of the crank shaft and the big ends cads of the connecting rods rode arc are such as the they swing around the tho crank crankshaft crankshaft shaft bearings that the they produce equal and opposite pulls as in tho the case of or orthe the two weights about the finger rInger there will bo be no vibration q If It these them weights are arc not equal there will be a pull on the crank shaft haft bearIngs bear bear- ings and the tho crank cranle case holding these bearings will tend to follow tho pull of the unbalanced weights In the path of ofa ofa ofa a circle This pull Is what causes vi vi- vi bration If It It U Is hj zero there is no vi vibration vi- vi brat bration ion This Tills pull can be made mad zero in effect by thin Ow VU proper balancing of or the crank crankshaft crankshaft crankshaft shaft tho n fly wheel and of the tho connecting connecting con con- rods before assembly |