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Show MOTORISTS,! ! ! IN HILL CLIMBS ;Many Drivers Do Not Know : Proper Means of Handling Car in Hill Climbs How steep Is the grade on this I road? Well I should say that it Is all of thirty or thirty-five per cent. , But I didn't have any trouble In mak- Ing It with my car. No, sir. She pulled ' It like a house afire Made It in high , . all the ay Passed two cars j laboring along In second " How often, with variations, do we 1 hf ar these words from drivers proud ; of the achievements of their cars, fro- i fluently to the disparagement of high- ; er priced cars from which, pfesuttl- I ably, n better performance should be . expected. After listening to statements i Of this kind from hundreds of tour-l tour-l Ists anxious to left of their trips and the remarkable exploits of their cars, i one Is at last convinced that not one man In a hundred has the proper i.tl-tnate i.tl-tnate of the percentage of a grade en- j 'countered No reliance is to be plai d Ion such estimates expressed by an ' other than one who knows from actual measurements with a gradometer. GRADE STI.T.P. Approaching an ascent, the grade naturally appears steeper than It ac- i tually Is This, coulped with the per ' formanco of the lndildual c.ir which; i may oi may not make the grade in high gear gives rise to an Incorrect estimate of the percentage of the j Krade Many motorists do not understand the process by which the designation Of s gradu percentage is arrived at, believing that R 20 per cent grade, for Instance. Is one which rises at an angle an-gle of twenty degrees from the horizontal hori-zontal Thin Is erroneous. The designation desig-nation of 10 per cent to a grade means ! that In that grade there Is a perpendicular perpen-dicular rise of twenty feet In one hundred horizontal feet In other words to generalize, the numrrr-l.il percentage of a grade Indicates that number of feet, perpendicular rise In: one hundred feet In relation to de- , grees It will be found that a crude uercen'ag' properly arrived In thl wav forms an angle equal to about one-half of the engle formed when' the numerical expression Is taken to . mean degrees Definite!. 8 - 0 per ,-ent grade Is nrtnul orr-half sfr as the grade formed by S 10-degree angle frm the horizontal. |