. Automotive industries . erves three purposes: First, to stop the tractortransmission immediately after the clutch is released;second, to stop the tractor when the transmission is ingear; third, to stop belt-driven machinery. The thirdobject is accomplished by an extension from the twoclutch operating lines to the driven machine and this feature is said to appeal very much to the user, as hecan stop his belt-driven machine instantly without goingto the tractor. The belt pulley is connected with the engine clutchthrow-out cam, so that the brake action follows theclutch action, and it is stated
. Automotive industries . erves three purposes: First, to stop the tractortransmission immediately after the clutch is released;second, to stop the tractor when the transmission is ingear; third, to stop belt-driven machinery. The thirdobject is accomplished by an extension from the twoclutch operating lines to the driven machine and this feature is said to appeal very much to the user, as hecan stop his belt-driven machine instantly without goingto the tractor. The belt pulley is connected with the engine clutchthrow-out cam, so that the brake action follows theclutch action, and it is stated that gearshifting is accom-plished with absolutely no clashing of gears. Fig. 1shows clutch throwout cam A and brake shoe B. Thebrake rod and the pulley are not shown in this photo-graph, but the simplicity of the arrangement is apparent. The second brake is now actuated by hand instead ofby the gear shift lever as formerly, and is used to holdthe tractor stationary when the transmission is in neu-(Continued on page 817). Vieit8 of the Automotive line-driven tractor, showing improrentmts made the past year 804 AUTOMOTIVE INDUSTRIESTHE AUTOMOBILE April U, 1921 The Influence of Various Fuels onEngine Performance This is the first of a series of articles describing what is believed to be oneof the most thorough and important investigations of engine fuels everconducted. It has been definitely proved that the tendency of a fuel todetonate is by far the most important factor in determining its value foruse in engines. Power and efficiency not increased by use of of aromatics, naphthenes and paraffins important. By H. R. Ricardo* - IN the latter part of 1919 the author started ex-tensive research work on hydrocarbon fuels, includ-ing a thorough investigation into the behavior ofthe working fluid in an internal combustion enginecylinder and the influence of the composition of the fuelupon its behavior. Before any actual experimental work was started acareful analysi
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
