Vacuum Engine

The working principle is similar to the hot air engine, except that this engine draws hot air into the cylinder.
Heat is drawn into the cylinder, at BDC the inlet valve shuts the heat then cools down this in turn creates a vacuum, this vacuum plus air pressure then forces the piston back up the bore which gives the power stroke. A constant burning flame is used to relight the gas after the main ignition flame has been sucked into the cylinder.
Model Vacuum Engine by Mick Cherry.

See also: Engine, Stirling Engine.

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Subjects: Engines

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