Steam Engine...

A steam engine is a heat engine that performs mechanical work using steam as its working fluid.

 In 1781 James Watt patented a steam engine that produced continuous rotative motion.

 Steam engines are external combustion engines,where the working fluid is separate from the combustion products.

  These 10hp engines enabled a wide range of manufacturing machinery to be powered. The engines could be sited anywhere that water and coal or wood fuel could be obtained. 

Within a century,in 1883, engines that could provide 10,000 hp were feasible. Steam engines could also be applied to vehicles such as traction engines and the railway locomotives..

  The ideal thermodynamic cycle used to analyze this process is called the Rankine cycle. In the cycle water is heated into steam in a boiler until it reaches a high pressure. When expanded through pistons or turbines, mechanical work is done. The reduced-pressure steam is then condensed and pumped back into the boiler. 

The first steam turbine-powered ship