muffler and is controlled by a lever at the front of the driver's 

 seat. The muffler was not always on the car; it was often 

 removed for racing, as shown in figure 65. 



A crank throw on the forward projection of the crank- 

 shaft drives a reciprocating-piston air pump (figs. 70 and 

 71 ), which supplied compressed air for the unique system 

 of controlling the engine speed. When the engine was run- 

 ning, compressed air was supplied to the lower ends of 

 small cylinders enclosing pistons on the stems of the four 

 intake valves. The air pressure opposed the motion of the 

 valves as they were being drawn open by engine suc- 

 tion. Two relief valves, one a foot plunger, the other a 



Figure 70. — Pump that supplied com- Figure 71. — Exploded view of air 

 pressed air used to control opening pump of Winton "Bullet No. 1." 



of intake valves on engine of Winton 

 "Bullet No. 1 ." 



91 



