In 1763, James Watt's work on a model Newcomen Engine led to his development of a separate condenser and other improvements which revolutionised steam engine design.
At first, the engines were manually operated by cords but soon the valve gear was automated. This model incorporates the main features of the original automated engines.It has a Plug Rod that operates the Steam and Water Injection Valves, a Buoy which controls the power strokes of the piston and a combined Snifting Valve and Eduction Tank.
The model is not difficult to build (no machining is required) but you need patience to set up and operate the engine - you will need an oily rag and a supply of tea towels until you get the hang of it! Disastrous consequences used to occur with the original Newcomen Engine when operated by an unskilled operator.
It is not an accurate scale model of the original engine but serves to demonstrate the main features of an early Newcomen automatic engine with a water pump.
The boiler is heated by solid fuel tablets.
All in all, an attractive model of interest to the connoisseur.
The finished model stands 17" high x 11" long and 5" deep. Cylinder bore is 1" and maximum stroke is about 2" (variable).
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