54 BULLETIN 198, UNITED STATES NATIONAL MUSEUM 



by air pressure in the tank. This pressure was maintained by a 

 small air compressor driven by the engine. With the engine at rest, 

 and pressure down in the tank, a hand pump on the instrument panel 

 board was used to establish the initial pressure. 



The intake manifold was heated by the exhaust gases passing through 

 a jacket on the manifold. Each block has its own exhaust manifold, 

 and an individual muffler in the center of the car. 



The engine is water-cooled, with a water pump for each block. The 

 pumps, located at the lower front of the engine, are driven by the 

 timing chain. A vertically mounted, tubular radiator is at the front 

 of the chassis with a fan, driven by the timing chain, located behind it. 

 The capacity of the cooling system is 6 gallons. An expansion tank, 

 connected to the overflow pipe of the radiator, is located on the right 

 side frame member. 



The selective transmission provides three speeds forward and one 

 reverse. The speed is selected by a gear-shift lever mounted in the 

 top of the gear box. A built-in lock enables the sliift lever to be 

 locked in the neutral position. On the side of the transmission hous- 

 ing is a small Kellogg air-cooled, l-cylinder air pump. This pump, 

 for inflating tires, is operated by engaging its driving gear with one 

 of the transmission gears by means of a small lever attached to the 

 pump. The transmission is secured directly behind the engine, with 

 a multiple-disk clutch between the two. The clutch is disengaged 

 by depressing the left of two large pedals. The hand-brake lever, 

 pivoted on the outside of the gear box, is connected by rods to internal, 

 expanding shoes within brake drums on the rear wheels. The brake 

 pedal is connected by rods to external, contracting bands on the same 

 drums. 



The frame of the chassis is formed of two U-shaped channels with 

 four strengthening cross members. It is supported on two semielliptic 

 springs at the front, and on a pair of semielliptic springs and one 

 transverse spring at the rear. The Timken front axle has pivoted 

 steering knuckles at each end, connected together by a tie rod parallel 

 to, and in front of, the front axle. Worm and sector steering is used, 

 with the steering wheel at the left side of the car. 



The wheel base is 132 inches and the tread 56 inches. Kelsey artil- 

 lery type wheels with demountable rims of 23-inch diameter are used, 

 mounting 33-by-5-inch straight-side pneumatic tires. No shock 

 absorbers are provided, but rebound straps are fitted to the outer ends 

 of the rear-axle housing. The rear axle is the Timken full-floating 

 type with Timken differential unit. A torque arm leads from the 

 rear axle to the center cross member of the chassis. A propeller shaft 



