Jun/Jul 2008

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How Your Hobby Started (Part 3)

By Carleton M. Mull

3904 47th Ave. S., Seattle, Washington 98118

Early inventors as Huyghens, Papin, Robert Street, Barnett, Samuel Brown and others, while testing versions of their engines, realized considerable accomplishment when they were able to get an engine to explode the fuel in a proper progression to create enough power to keep a flywheel turning. Under such circumstances, with crude machines, it was hardly possible to classify engines according to a type such as two or four cycle.

From all of these efforts, a light was dawning. In England, an engineer by the name of Dugald Clerk, worked on an idea of one intake stroke and one power stroke on his engine by using the travel of the piston to uncover a port in the cylinder to exhaust the burned gases. His engine was built with an auxiliary cylinder used to compress air for scavenging.

When the power piston ...

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