. Automotive industries . nt of friction as well as of the wear-ing qualities of the lining. Axle Tests Tests for the purpose of determining the efficiency anddurability of various types of final drive in truck rearaxles are proceeding and should also furnish much dataof value to manufacturers and designers. The axles un-der test include for the present only those types intendedfor use on army trucks, but the apparatus being used isapplicable to test of any axle. The axles undergoingtest include the White double reduction type, and theworm gear type used on Class B army trucks, the latterbeing
. Automotive industries . nt of friction as well as of the wear-ing qualities of the lining. Axle Tests Tests for the purpose of determining the efficiency anddurability of various types of final drive in truck rearaxles are proceeding and should also furnish much dataof value to manufacturers and designers. The axles un-der test include for the present only those types intendedfor use on army trucks, but the apparatus being used isapplicable to test of any axle. The axles undergoingtest include the White double reduction type, and theworm gear type used on Class B army trucks, the latterbeing fitted in various tests with Timken roller bearings,ball thrust bearings, or deep-groove ball bearings, inorder to determine which of the three bearing types isbest suited for the service in question. The layout of apparatus is as follows: Power is sup-plied by an electric dynamometer, running as a motor,on current supplied from an external source. To the April 7, 1921 AUTOMOTIVE INDUSTRIESTHE AUTOMOBILE 751 flTHERMOMET;. Standardized apparatus forWaters carbonization test field frame of thedynamometeris rigidly con-nected a four-speedgearbox such as isused in the Class Btruck, the outerend of the trans-mission being sup-ported in a ballbearing trunnionsimilar to that usedon the field frameof the dynamome-t e r . The drivenshaft of the gear-box is attached tothe dynamometershaft, and the driv-ing shaft of thegearbox to thedriven shaft of theaxle to be purpose of thegearset is to en-able direct drive,or drive througheither of threesets of gears withreductions of , or to 1, as desired. In every case the torquedelivered at the final driving shaft of the transmissionis the torque measured on the dynamometer arm, thelosses in the transmission being automatically deductedby the expedient of carrying the gearbox on the fieldframe of the dynamometer. This enables accurate meas-urement of the power input to the rear axle to be tested,and a wide range of torque o
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
