Jun/Jul 2008

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The Flamelicker

By James L. Eochantin

Route 1 Box 54 Du Bois, Illinois 62831

The "What Is It?" engine, on the top of page 22 of the March-April GEM, is indeed a "flamelicker".

I came across an article in the December 1938 issue of Popular Mechanics ; It explained the operation of this type of hot-air engine, and included plans for construction of one.

The burner, or candle flame, provides the power for the engine. The two-stroke cycle is shown in the diagram. Just before top dead center the valve opens; the piston starts on the downward stroke (fig. 1.) and "inhales" part of the flame (actually hot gas); the valve closes at bottom dead center, and immediately the gas cools, creates a vacuum, and draws the piston back up (fig. 2.), the power stroke. The valve opens just before top dead center to let the cooled gas escape before drawing a fresh charge of hot gas.

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