CATALOG OF THE MECHANICAL COLLECTIONS 163 



After tlie engine was connected to the transmission equipment, it 

 was found necessary to add flywheels. After much experimenting 

 these were made of two automobile wheels with tangent spokes in 

 which special cast aluminum rims of U -section were substituted for 

 the original too flexible steel rims. 



When completed the net weight of the engine proper was 124.47 

 pounds; with the two flywheels, 140 pounds; and with 20 pounds 

 of cooling water and accessories the total weight of the power plant 

 was 207.47 pounds. 



In three separate tests of 10 hours each, of continuous running, the 

 engine carried a continuous load of 52.4 horsepower at 950 revolu- 

 tions per minute. 



HAYNES AUTOMOBILE ENGINE, 1914 



U.S.N.M. no. 2S3279 ; origiual ; presented by the Haynes Automobile Co. ; not 

 illustrated. 



This is a 6-cylinder, L-head, gasoline engine. The cylinders are 

 cast in pairs, the bore is 414 inches, the stroke 5i/^ inches. The valves 

 are the poppet type operated by a camshaft geared to the crank- 

 shaft. The engine developed 65 horsepower and weighs 1,000 

 pounds. It has splash lubrication with a plunger pump to return 

 the oil to the splash basins. It is equipped with a Leece-Neville elec- 

 tric starting and lighting system and high-tension magneto ignition. 

 The carbureter is a Stromberg, to which gasoline is fed under pres- 

 sure supplied by a hand pump and a mechanical air pump. 



The engine is exhibited with its transmission, which is fitted with 

 a Vulcan electric solenoid gearshift. 



AUTOCAR GASOLINE TRUCK ENGINE, 1921 



U.S.N.M. no. 307254 ; original ; gift of the Autocar Co. ; not illustrated. 



This is a 4-cylinder, vertical, cast-in-block, 4-cycle, cylinders-in- 

 line, water-cooled, gasoline engine. It has 4i/^-inch bore, 5^-inch 

 stroke; and A. L. A. M. rating of 28.9 horsepower. The crankshaft 

 is supported in two annular roller bearings, with no center bearing. 

 Lubrication is by the splash of the connecting rods in cups on the 

 ends of standpipes located under each crank. Oil is circulated from 

 the reservoir in the bottom of the crankcase through a strainer to 

 the splash cups, by a gear pump. Water is circulated by a centrifugal 

 pump. The engine is equipped with Bosch high-tension magneto and 

 a Stromberg carburetor. A centrifugal governor operating from the 

 camshaft limits the top speed of the engine. 



