The design, construction, and operation of a horse power meter as applied to a rear wheel dynamometer for testing automobiles . re preventedthe engine from starting smoothly, and thejerking start stripped the cast iron teeth off thegear. thereafter, the rear wheels were throwninto geat with the pressure removed from thedynamometer friction disks, and the enginewould start up very smoothly. After theengine is driving the rear wheels, the waterpressure can be applied in the dynamometer,without disturbing the smoothness of opera-tion of apparatus. •«e found it impossible to ooerate the 27. automo
The design, construction, and operation of a horse power meter as applied to a rear wheel dynamometer for testing automobiles . re preventedthe engine from starting smoothly, and thejerking start stripped the cast iron teeth off thegear. thereafter, the rear wheels were throwninto geat with the pressure removed from thedynamometer friction disks, and the enginewould start up very smoothly. After theengine is driving the rear wheels, the waterpressure can be applied in the dynamometer,without disturbing the smoothness of opera-tion of apparatus. •«e found it impossible to ooerate the 27. automobile for more than a half hour of con-tinuous running-, because of the excessive nestingup of the engine. In fact the radiator wouldbegin steaming like an open safety valve. -efinally remedied this drawback by connectinga l/8 copper tube from the cold water supplyline to the radiator, and connecting the out-let of the overflow with a pipe leading to thesewer. In this way, the radiator was always keptfull of hot water, but never so hot as to steam,and the engine could be operated continuouslywithout overheating. e&.. F/G, 8. AEMOUB INSTITUTE OF TECHJJOL-XSv LIBB^BX 29. CALIBRATION OF HORSE-POWER METER. The tachometer, and manometer mechanisms,although once calibrated while separated fromthe case, gave data for determining, approximately,the proper length of mercury manometer for meter, and the correct ratio of gear teethfor the pinion driving the flexible shaft. Afterthe two mechanisms haci been brought together, andproperly connected to the remaining test appara-tus, it was necessary to calibrate the twomechanisms, again, in order that a chart could bedrawn for the meter. LiANOMETER CALIBRATION. The flexible shaftingwas disengaged from the driving pinion, and theengine iDut on direct drive. The water pressurein the dynamometer was regulated by means of theinlet valve, and a series of points were taken onthe chart with the corresponding loads, as obtainedfrom the spri
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Keywords: ., bookcentury1900, bookdecade1910, bookiddesignconstr, bookyear1916
