This Steam Engine Working model is provided with a horizontal boiler with a Whistle, Safety Valve and Stem gauge. Model is mounted on a metal base. This working model illustrates the commercial Steam Engine properly. Burning of fuel make the water in the Boiler boil and the joint piston makes the flywheel mounted on the crank to rotate. A pulley mounted at the free end of flywheel shaft can be used to drive dynamo etc to demonstrate the conversion of Chemical energy to heat, mechanical and electrical engines respectively.