Letters and Miscellanies

Sun-Doxford, as big as a house

| April 2007


I saw the story in the November 2004 issue of GEM about the K.C. Lightning hay press engine and I had to tell about another opposed piston engine made by Sun-Doxford Co. of England.

In 1948 and 1949, I went to Hemphill Diesel School in New York under the G.I. Bill. The teacher took us to Philadelphia to a shipyard to see a Sun-Doxford. The engine was big as a house!

The bore and stroke was 36-by-72-inch and it was a 4-cylinder opposed-piston type. It was so hard to start that it was never shut down, just turned to idle.

It was a diesel and had three injectors in the middle of the cylinder. At idle, only one was used. The oil in the crankcase was never changed. It ran through a separator to take the dirt out and then some kind of filter to take the acid out, then returned to the engine. New oil was added if needed.



The crankcase had doors so you could go inside as it ran and walk over the mains and out the other side.

Neal Mayes
Unadilla, N.Y.



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