Mystery steam engine

[chris123]

I don't think marine compound engines generally had flywheels.
I would not add a flywheel unless there was a problem that required it.

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Ok thank you
Chris

 

[chris123]

I think you are on the right track.
.

Thank you for your work
Awsome
Best regards chris

 

[Steamchick]

I disagree Green T. I have seen marine twins with small flywheels, both simple pressure and compound. Admittedly the diameter of the flywheel is probably less than 1 1/2 times the stroke, unlike large flywheels on Mill engines, etc. Often solid and relatively massive though, especially where there is just a single H.P. cylinder on a compound, that probably has a "starter" steam feed to the L.P. cylinder. Otherwise the single H.P. cylinder acts like a single that can stall at end-of-stroke,
.But there may be some simple twins with 90 degree cranks that have no flywheels.
K2

 

[chris123]

The more I see of this engine, the more I am impressed with the quality of its design and construction. Your balsa lifting link looks about right. In an engine of this quality the links might be made with split bronze bearing blocks both ends. It looks as though you will need four of them. They need to be a good fit on the pins as they take a surprising amount of alternating load when the engine is running. If they are at all loose the whole valve gear jiggles about and makes a lot of clatter.

Hi charles another question
What is with the eccentric on the right?
On the side od the block its got like a thickened part in the cast where u could mount soemthing

 

[chris123]

I disagree Green T. I have seen marine twins with small flywheels, both simple pressure and compound. Admittedly the diameter of the flywheel is probably less than 1 1/2 times the stroke, unlike large flywheels on Mill engines, etc. Often solid and relatively massive though, especially where there is just a single H.P. cylinder on a compound, that probably has a "starter" steam feed to the L.P. cylinder. Otherwise the single H.P. cylinder acts like a single that can stall at end-of-stroke,
.But there may be some simple twins with 90 degree cranks that have no flywheels.
K2

It looked like that first if it helps