Engine models: Steam, 4-cycle Otto.

Engine models: Steam; 4 Cycle Otto Steam Engine. Actually Works. Electric heater boils water, blows a whistle, drives a piston, turns a wheel, runs a generator and lights a bulb when the valve is opened. Model of Steam Engine (Hand-cranked) Model of 4 Cycle Otto Combustion Engine (Hand-cranked) 6V Battery powers light bulb to show when ignition occurs. ENGINES AND PUMPS.
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