and 6 inches, respectively, with a total piston displacement 

 of 1 ,029 cubic inches. The engine is mounted in the center 

 of the chassis, with the crankshaft parallel to the sides of 

 the frame. The two aluminum crankcases are attached to 

 the left frame member by four integrally cast arms, while 

 the two 4-cylinder blocks are secured to the right frame 

 member. 



The two crankshafts are bolted together in the space be- 

 tween the two crankcases, as are the two camshafts. Lead- 

 ing up between the two engines, and driven by the cam- 

 shaft, is a shaft attached to the ignition distributor, now 

 incomplete. 



The engine is of the 4-cycle type, with cam-actuated 

 exhaust valves lying horizontally at the bottom right of the 

 engine. To the right of the exhaust valves are the auto- 

 matic intake valves, which would be overhead valves if the 

 engine were mounted upright. Each 4-cylinder block is 

 fitted with an aluminum intake manifold, both of which 

 are now damaged. The two carburetors are missing. 

 There are no exhaust manifolds, the spent gases having 

 been exhausted directly into the open, beneath the blocks. 

 The engine ran in a clockwise direction. 



Access plates are located over each of the eight throws 

 of the crankshaft, enabling ready inspection of the bearings. 

 Each 4-cylinder unit is equipped with five main bearings. 



A sheet-brass oil reservoir, with a shut-off valve, is 

 secured above the front cylinders. It delivered oil by 

 gravity to a float-equipped, constant-level oiler on each set 

 of cylinders. Oil then flowed by gravity from these two 

 oilers to the ten main bearings, the eight cylinder walls, the 

 timing gears, and the air pump. 



Secured to the outside of the crankcase of the front engine 

 is an air pump operated by a rod connected to the skirt of 

 the third piston. When the engine was running, com- 

 pressed air was supplied to the pistons on the ends of the 

 eight intake valves to control the amount of their being 

 drawn open by the engine suction. Two relief valves, one 

 a foot plunger, the other a hand valve, served to vary the 

 pressure as desired. The lower the pressure, the farther 

 the intake valves would be drawn open, and the faster the 

 engine would run. 



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