Heating water, to produce steam, takes time and the engine cannot start instantly.Much of the heat is lost in the boiling of water,to increase the temperature of water to its boiling point. There is more loss of heat in this type of engine. The efficiency of the engine is very low.The bulk and the heavy weight of the engine is not suitable for small vehicles. The fuel chamber is not shown in the diagram. Construction of steam engine is not as simple as shown in the diagram.Limitations of Steam Engine Limitations of Steam Engine: Valves open in one direction only to let in or to let out steam at appropriate stages. In steam engines, the fuel, mainly coal is burnt outside the engine. In steam engines, there are special shutters called valves. The condensed water is expelled out and fresh steam is let in to repeat the process. ![]() Due to inertia of the crank shaft, the wheel makes another half rotation and completes one cycle.This is exhaust stroke. The piston is then pushed back into the cylinder due to low pressure region. The wheel of the crank shaft makes half rotation during the expansion stroke. Steam expands and it pushes the piston forward and loses some of its kinetic energy. Crank shaft converts linear movement of the piston into circular motion. Crankshaft connected to the piston also moves. As the steam expands in the cylinder, it pushes the piston forward. As steam occupies a much larger volume than the same amount of water, it exerts great pressure on the walls of the container in all directions. ![]() Water is heated in a boiler, to generate steam of high pressure which is passed into a cylinder fitted with a piston.
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