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220HP-Enterprise-DSW-6.html

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Gas Engine Row 1937 220HP Enterprise DSW 6

Gas Engine Animations  1905 15HP Reid   1910 15HP FM Hoist   1912 30HP Union-Ideal
1914 Chicago Pneumatic   1920s 20HP Bolinder   1922 150HP FM YV   1923 15HP FM Z
1924 80HP Western   1925 20HP Novo   1925 120HP Western-Enterprise   1925 140HP Venn-Severin   1930s 120HP Clark-Brothers   1937 220HP Enterprise   1950s LeRoi Compressor


1937 220HP Enterprise DSW 6

Manufactured by the Enterprise Engine Company of San Francisco California in 1937. 6 cylinder diesel with a 10 inch bore, 13 inch stroke, 6126 cubic inches displacement. 254mm bore, 330.2mm stroke, 100.4 liters displacement. 220 HP -- 164.1kW at 450 RPM. Weight 33,100 lbs. – 15010kg., cost $23,600 installed. Generator: Westinghouse 16 pole, 150 kW, three phase, 480 volt AC. Exciter 4.5 kW, 126 volt DC. This is one of three generators that were used for backup power at Palomar Observatory from 1938 to 1996. The time on this generator after 58 years at Palomar was only 4800 hours. (Editors note:Gas engine row Volunteers say “back up power”, but the caption beneath a photo-copied photo (below) says three Enterprise diesel generators provide “All electricity requirements”. While the Observatory website history time line, mentions water and electricity brought to the site during 1936 Dome construction, I find no mention of these diesel generators on their website.) Donated to our Museum in 1996, this engine was one of only two model W engines ever built with enclosed valve gear. Most model W engines built were for use in marine applications and carried a DMW-4 or 6 designation. All of the DMW engines had exposed valve gear. Only a few DSW engines were made. This one was the second and the last built with special enclosed valve gear. We believe the other DSW-6 built with enclosed valve gear was S/N 6109 with an original owner designated in the listing as "Dunn & Baker". We do not believe this engine exists any longer. It appears that this may well be the only existing version of an enclosed valve gear DSW-6.