Ericsson Hot Air Engine


| August/September 1996


706 Teresa Court Petaluma, California 94954

I have an Ericsson engine. The diameter of the air cylinder is eight inches, it stands five feet five and one-half inches in height, weighs one thousand pounds, is from the 1880-1900 years, and it is a quiet running engine as of this day.

Sandy Mills, Sr., with the help of his friend Sam Harkleroad, a mechanical engineer, and a 1906 catalog from the Smithsonian Institution, made measurements of each part needed to restore the Ericsson engine.

Sandy Mills Sr., a machinist and mechanic, rebuilt and handcrafted the missing parts needed to make it a working engine. He spent many hours on each piece of brass and iron part, to make it look and function just as the original item would.

Restoring a pile of disassembled, rusted engine parts from the nineteenth century era was a lot of work, and many months of effort went into the project. The engine was assembled and running by May 1977.

The engine's only function was to pump water. Its most noteworthy feature was that the very water it was designed to pump was also used to keep the engine running, by cooling the hot air. It was used mainly to pump water from wells for livestock, and to supply the home with water.






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