. Automotive industries . Aro, one of the riding garden tractors 450 AUTOMOTIVE INDUSTRIESTHE AUTOMOBILE February 24, 1921. Sectional view of Aro tractor Utilitor tractor whereby the power of the engine has beenmaterially increased. The engine has been retimed andthe valve lift increased 1-16 in. At the same time the inletmanifold was enlarged so as to give the gases a freer en- trance into the cylinder. The shapeof the combustion chamber has beenchanged somewhat and the com-pression raised 10 lb. p. sq. in. Re-movable valve stem guides and avariable speed governor are now em-ployed. The magne
. Automotive industries . Aro, one of the riding garden tractors 450 AUTOMOTIVE INDUSTRIESTHE AUTOMOBILE February 24, 1921. Sectional view of Aro tractor Utilitor tractor whereby the power of the engine has beenmaterially increased. The engine has been retimed andthe valve lift increased 1-16 in. At the same time the inletmanifold was enlarged so as to give the gases a freer en- trance into the cylinder. The shapeof the combustion chamber has beenchanged somewhat and the com-pression raised 10 lb. p. sq. in. Re-movable valve stem guides and avariable speed governor are now em-ployed. The magneto drive has beenimproved and the location of thespark plug so changed as to place itin the path of the incoming piston is now relieved eccen-trically instead of all around and theconnecting rod bearing is oiled bymeans of an oil ring catching oil, inaddition to the oil it receives fromthe splash. A number of improvements havebeen made in the Beeman gardentractor, the pioneer in its class. Thecrankpin bearing area has been in-creased. The clutch mechanism hasbeen redesigned, so that both wheelsare positivel
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
