44 BULLETIN 19 8, UNITED STATES NATIONAL MUSEUM 



The water-cooled engine is of the 4-cylinder, 4-cycle, T-head type, 

 with cylinders cast in pairs. The bore and stroke are the same, 5% 

 inclies, giving a total piston displacement of 597 cubic inches. Each 

 cylinder has an intake valve on the right side and an exhaust valve 

 on the left, operated by two camshafts in the aluminum crankcase. 

 The exhaust camshaft is movable lengthwise by means of linkage con- 

 trolled by a handle reached from under the front of the radiator. 

 Moving the camshaft lifts the exhaust valves partially from their 

 seats, lowering the compression and aiding in starting with the hand 

 crank. The exhaust manifold leads to a muffler under the left side 

 of the car. 



A Bosch DK-4, 2-spark, dual magneto, fitted to the right front of 

 the engine and driven by a shaft projecting back from the timing 

 gear case, furnished spark to two spark plugs in each cylinder. 



A similar shaft on the other side of the engine drives a water pump 

 and, by means of sprockets and chain, a Bijur electrical generator, 

 which is not original. 



A small tank, mounted on the front of the dash above the engine, 

 held a supply of oil. It contains a pump driven by a vertical shaft 

 geared to the rear of the intake camshaft. This oil, replenished from 

 the tank behind the seats, was pumped to the bearing surfaces inside 

 the engine, draining into the oil pan of the crankcase. An oil-level 

 glass in the back side of the small tank is visible to the driver. A 

 shut-off valve handle projects through the dash, shutting off the ex- 

 ternal oil supply to the cylinder walls when closed. 



An electric starting motor, not original equipment, hangs below the 

 left, rear part of the engine, its gear engaging a ring gear shrunk on 

 the flywheel of the engine. 



The frame, of 128-inch wheel base, is supported on four semielliptic 

 springs. JM shock absorbers are mounted on the rear shackles of the 

 rear springs, while the front springs are equipped with telescopic, 

 airplane-type "jounce preventers" made by Ernst Flentje, of Cam- 

 bridge, Mass. The rear axle is a solid, "dead" axle on which the rear 

 wheels turn. Truss rods at each end of the axle lead forward to the 

 frame of the car. Adjustments on the ends of the rods allow the axle 

 to be shifted to take up slack developing in the chains. Internal 

 expanding brake shoes in the rear- wheel brake drums are controlled 

 by the hand-brake lever to the right of the driver. 



The steering wheel turns a post within a column and, by means of 

 a worm and gear in the steering-gear box, controls steering linkage 

 connected to the two front wheels. 



The transmission, of the selective, sliding-gear type with four for- 

 ward speeds and one reverse, is combined with the differential in a 

 single aluminum case in the center of the car, the speeds being selected 



