. Test of a delco lighting plant . Fig. 2 - Flywheel. 11 lEST OF A DELCO LIviETliiG PL^iil. past the heated cylinder ut a high velocity,providing effective cooling without the useof an idditionul fan. The path of the airwhich cools the engine is shown in ?ig. 3. The cylinder (Fig. 4) and cylinderhead are covered with lins which distributethe heat over a Isr^e ^ree, thereby radijting surfoce to the cooling 9ir. The gjsoline tank, which is -ittgchedto the draft tube, has a capacity of one g-:.l-lon; this is sufficient to r;in the enginefor five hours. The crank case holds bout two
. Test of a delco lighting plant . Fig. 2 - Flywheel. 11 lEST OF A DELCO LIviETliiG PL^iil. past the heated cylinder ut a high velocity,providing effective cooling without the useof an idditionul fan. The path of the airwhich cools the engine is shown in ?ig. 3. The cylinder (Fig. 4) and cylinderhead are covered with lins which distributethe heat over a Isr^e ^ree, thereby radijting surfoce to the cooling 9ir. The gjsoline tank, which is -ittgchedto the draft tube, has a capacity of one g-:.l-lon; this is sufficient to r;in the enginefor five hours. The crank case holds bout two quartsof oil. Lipping into this oil, is u largegear which is driven by a s-^iller gear on thecrank shaft. This gear splashes oil upon thebearings within tne crank cse; and at theend of each dov/nward stroke, oil is splashedupon the piston and carried upward on the la. iig, 3 - Air-passage Diagram, l--^ TEST OF A DELCO LIGHTIKG PL\RT. piston, lubricating the cylinder walls. On theends of the crank ;ft, ^re oil throwing rings,VvTiich prevent the oil frou. following the crankshaft out to the flyvmeel on one end, or thearmature on the other. The crank shaft is a heavy drop forg-ing, and is provided with counterbal-ince is mounted with a ball be-^ring at the gene-rator end to receive the radial and end thrustload, and a roller bearing at the flywheel endwhich will any contraction or ex-pansion of the snaft due to temperature vari-ations. The piston is m^de of riluminum 3lloy,and is fitted ;ith three piston rings. Theseare cast-iron and of the eccentric type; thisproduces uniform pressure against the cylinderwalls. Two oil carrying grooves :.re turned inthe lower end of the piston. 14 TEST OF A DELCO LIGHTING PLANT. On the side of the crank aiS, is aprojection containing the hreather -ind oilfiller. The breather is packed wit
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