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Scale Model Engineering Steam, gas and hot air model engines, tractors and accessories. Machining and milling castings.

Scale Model Engineering

Maudslay Marine oscillating steam engine

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Old 03-04-2019, 01:52:13 PM
gbritnell gbritnell is offline
Join Date: Jul 2006
Location: Strongsville, Ohio U.S.A.
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Default Maudslay Marine oscillating steam engine

A long time contributor on one of the modeling forums, Chuck Fellows, designed and created a model of a Maudslay Marine steam engine. It's unique in the valving that it uses to control the intake and exhaust. The rotary valve is in a separate chamber and as the cylinder rocks from side to side the valve is held stationary through a pair of links thus opening and closing the ports.
The entire build has a Victorian elegance to it with the trellis type upright supports.
Another fellow took it upon himself to do all the drawings and they were freely posted on the formum.
Not wanting to follow the mainstream I took the drawings and scaled them down by .70. This created an engine with a bore of .393 and a stroke of 1.050. The smallest screws are 0-80. It's built mainly from brass with mild and stainless steel used for the crankshaft, piston shaft and small hardware.
It also has a valve that allows the engine to run it both directions.
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