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Old 07-24-2003, 07:11 PM
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Quote:
Originally posted by P.E.Haiges
It very simple:

An engine uses a chemical reaction to create heat which causes expansion of a liquid or gas which drives a piston or turbine to create mechanical motion and energy.

A motor converts another form of energy such as electricity, moving air, hydraulic, ETC to mechanical motion and energy. Although motors may get hot, they do nor derive their source of propulsion from heat.

P E H
Steam powered machinery is powered by gas expansion and concommitant temp drop inside a turbine or piston. They were called engines before there was electric motors.

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