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The New Economical Steam Engine

Play the animation and find out how this steam engine, pioneered by James Watt, produced steam so economically.  The Cornish Beam Engine (1834) was originally developed to pump out floodwater from the deep mines that are found in Cornwall.

The up and down motion of the piston in the cylinder is transmitted by the beam to the piston in the water pump. The steam cylinder piston goes down under the pressure of steam, and differences in atmospheric pressure created by the partial vacuum beneath the piston.

The Beam

The beam, powered by the cylinder piston, pulls up the water pump piston. At the end of the downward stroke, the steam pressure is released and the steam cylinder piston returns to its original position - because it is dragged back up the cylinder, by the weight of the pump rods at the other end of the beam.

The Kew Bridge Steam Museum

The Kew Bridge Steam Museum, in London, has the largest working Cornish Steam Engine in the world. It was actually built for the site to pump water to west London, and started work on the 30 May 1846. It was only taken out of service in 1944 - a working life of just under a century.

The massive engine was constructed for the Grand Junction Water Works company, and is able to pump 472 gallons in just one single stroke. The beam, which is made from cast iron, weighs a staggering 35 tons. The engine was transported from Cornwall to London by ship, before being loaded onto a barge for the journey up the Thames.

There are smaller beam engines, such as one from Boulton and Watt, that can be seen at the Kew Museum. The engine was built around the time of Watt's death in 1819, and it was moved to the site in 1839-40. James Watt's inventions meant that the steam engine became much more economical to use, and thus he helped to set in motion the Industrial Revolution.
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  Exclusive replica range of steam trains, steam engines, railway steam engines, steam generators, locomotive steam engines, real model steam engines collector items.  

Ever since the 1700s, when Savery and Newcomen first designed steam engines to pump water form flooded mines - and James Watt built the first engine that could turn wheels. From then on, steam changed the face of Britain. It was the Golden Age of Steam - culminating in the magnificent achievements of The Flying Scotsman!

Mamod Working Steam Models recapture the excitement of that era giving immediate enjoyment and fun. Fire from safe solid fuel tablets, the boilers of Mamod models soon reach working pressure and you quickly experience the joys of steam in action.


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