. Automotive industries . AUTOMOTIVE INDUSTRIESTHE AUTOMOBILE. Fig. 2—Rolling resistance as measured by the machine shown i>i Fig. 1 March SI, 1921 rests on the surfaceof a drum whichturns at a peripheralspeed of 30 drum is drivenby an electric motorM. It is possible tomeasure the powerabsorbed by the mo-tor by means of avoltmeter V and anammeter A. The tireis first raised in sucha manner that it doesnot touch the drumon which it the voltmeter andammeter are read offthe power consump-tions correspondingto starting and normal running. Chronometer readingsare taken of the t
. Automotive industries . AUTOMOTIVE INDUSTRIESTHE AUTOMOBILE. Fig. 2—Rolling resistance as measured by the machine shown i>i Fig. 1 March SI, 1921 rests on the surfaceof a drum whichturns at a peripheralspeed of 30 drum is drivenby an electric motorM. It is possible tomeasure the powerabsorbed by the mo-tor by means of avoltmeter V and anammeter A. The tireis first raised in sucha manner that it doesnot touch the drumon which it the voltmeter andammeter are read offthe power consump-tions correspondingto starting and normal running. Chronometer readingsare taken of the time elapsing before the starting pointand the normal speed are attained. The results of the experiment are plotted graphicallyin Fig. 2. 1—On starting the straight side wheel takes 426 watts more than the clincher wheel. This is more than l,2 hp. and is enormous (1 hp. = 746 watts).2—The normal speed is attained by the clincher tire at the end of 3 m. 9 s., and by the straight side tire at the end of 6 m. 3—At normal speed the straight side tire take
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
