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Watts rotary steam engine
we worked out how much each company save by using our machine rather than a team of horses. The company then pay us one third of this figure every year, for the next twenty-five years. we use the term horse power to say how much power our machines have. By doing this the people buying these machines will not complain about the price for using these machines because we have worked out how much power it has got and then charging the buyers for the price its worth.
what has changed
three significant additions have been added to our new steam engine. we have introduced the centrifugal governor, a device that could control steam output and engine speed. we have made the engine double-acting by allowing steam to enter alternately on either side of the piston. This allowes the engine to work rapidly and deliver power on the downward as well as on the upward piston stroke. Most importantly, we have attached a flywheel to the engine.Flywheels allow the engine to run more smoothly by creating a more constant load, and they convert the conventional back-and-forth power stroke into a circular (rotary) motion that can be adapted more readily to power machinery.
what is it used for
The previous engines..
our improved steam engine offers a powerful, reliable power source that can be located almost anywhere. It is used to pump bellows for blast furnaces, to power huge hammers.
There were two previous engines before the rotary steam engine. The first one was Newcomens engine. This was the first out the three to be created. The second engine was the Boulton and watt steam engine
and now the rotary steam engine is the third one to be created. It was created in 1782
How it works
Our machine drives on both the forward and backward strokes of the piston, and a sun-and-planet gear produce rotary motion. the sun-and-planet gear is a shaft that produces two revolutions for each cycle of the engine. The rotary steam engine also has a double-acting engine, in which the piston can apply power when pushing as well as pulling. The engine has a new method to connect the piston to the beam. This is the parallel motion—which is an arrangement of connected rods that guide the piston rod in a perpendicular motion. Having the beam connected to the piston shaft by a means that applied force alternately in both directions also means that it was possible to use the motion of the beam to turn a wheel. The main wheel attached to the crank is large and heavy, serving as a flywheel which, once set in motion, by its momentum maintains a constant power and smooths the action of the alternating strokes.