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Mem Corliss question

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Woodguy:
With the crank at top dead centre, what is the correct angular orientation of the eccentric?

crueby:
Should be 90 degrees from the crank pin. On mine, I made the eccentric point towards the cylinder when the crank was at the top - if you went the other direction it would run the engine in the opposite direction.

Jasonb:
I tend to set my engines up with some lead for smoother running so the eccentric should be ahead of the crank by 90deg plus the lead, say 20deg if air running 30 deg if steam powered.

This is similar to what Stuarts suggest for their engines

https://web.archive.org/web/20060713173202/http://www.stuartmodels.com/pdfs/SM-Timing.pdf

kvom:
The actual Corliss in Rhode Island has the top of the flywheel turning away from the cylinder.

crueby:
Just checked my videos of the compound Corliss at the Owls Head museum in Maine, it has the top of the flywheel turning towards the cylinder, not away. With this type of engine with a full crosshead guide, it may not matter as much?

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