. Farm machinery and farm motors. should pull when hitched to an evener it maybe considered a lever of the second class; the clevis pinof one horse acting as the fulcrum. From the law of me-chanics (see Art. 24) : Power X power arm := weight X weight arm. Example: Suppose two horses weighing 1,500 and1,200 pounds respectively are to work together on anevener or doubletree 40 inches long. If each is to do ashare of the work proportionately to his weight, it will bepossible to substitute their combined weight for the total I ANIMAL MOTORS 295 draft and the weight of the larger horse for his shar
. Farm machinery and farm motors. should pull when hitched to an evener it maybe considered a lever of the second class; the clevis pinof one horse acting as the fulcrum. From the law of me-chanics (see Art. 24) : Power X power arm := weight X weight arm. Example: Suppose two horses weighing 1,500 and1,200 pounds respectively are to work together on anevener or doubletree 40 inches long. If each is to do ashare of the work proportionately to his weight, it will bepossible to substitute their combined weight for the total I ANIMAL MOTORS 295 draft and the weight of the larger horse for his share ofthe draft in the general equation and consider the smallerhorse hitched at the fulcrum: 2,700 X long arm of evener = 1,500 X 40, , f , . , long arm 01 evener = •:= 22 2/9 inches, ^ 2,700 short arm of evener —40 — 222/9 = 177/9. That is, to divide the draft proportionately to the weights of the horses, the center hole must be placed 2 2/9 inches from the center toward the end upon which the heavy horse is to ■r.,.,*( •! •.> .!. ••• ■■•J<!i ■*
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