Cole’s Corliss Steam Engine

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Machined the center out of the eccentric straps this evening. Used the same basic setup except I clamped the strap down to the jig plate with 3 SHCS & washers. Rotated the turn table to get the desired bore.
 

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Back to the Corliss engine. Was able to finish the basic machining of the flywheel today. Have not made up my mind on how to secure the flywheel to the shaft. Can’t say I like what the drawing calls for. Two angled set screws clamping on the shaft. That setup is asking for trouble, if the flywheel ever needs to come off the shaft.
 

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Back to the Corliss engine. Was able to finish the basic machining of the flywheel today. Have not made up my mind on how to secure the flywheel to the shaft. Can’t say I like what the drawing calls for. Two angled set screws clamping on the shaft. That setup is asking for trouble, if the flywheel ever needs to come off the shaft.
I’m building the same engine and was also skeptical of using set screws to fasten the flywheel to the crankshaft. I decided to use a custom tapered gib key and this has worked well, and looks good. The gib I made is 5/32” wide and 1/8” high at the thick end.

Good luck, and let us know what you decide.

Dave
 
I’m building the same engine and was also skeptical of using set screws to fasten the flywheel to the crankshaft. I decided to use a custom tapered gib key and this has worked well, and looks good. The gib I made is 5/32” wide and 1/8” high at the thick end.

Good luck, and let us know what you decide.

Dave

I second Dave's advice, all flywheels should be keyed, the set screws are there just to keep it from sliding, I'll add that I sometimes use loctite thread sealant (sealant *not* locker) on my setscrews to prevent them from loosening while still being removable without heat.
 
Been a while since my last post. My wife and I loaded up the LaFrance Fire Engine and went to the Cabin Fever Expo. What an awesome time. So much to see and do. I must say I was not prepared for the immense amount of compliments for the LaFrance. At times it was overwhelming. The only down side to the trip was we came down with Covid-19.
Anyway, we are doing better and I have been able to get into the shop to work on the Corliss. Made the piston assembly and connecting rod with their lock nuts. The drawings indicate that the piston rings to be 0.030” larger than the cylinder bore. For such a small bore that amount of compressed is way too much. So I am going to use something that I have used on my other steam engines. It is graphite impregnated cord. I will make multiple wraps around the piston ring groove until I get the desired height.
Till later, Larry
 

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Been a while since my last post. My wife and I loaded up the LaFrance Fire Engine and went to the Cabin Fever Expo. What an awesome time. So much to see and do. I must say I was not prepared for the immense amount of compliments for the LaFrance. At times it was overwhelming. The only down side to the trip was we came down with Covid-19.
Anyway, we are doing better and I have been able to get into the shop to work on the Corliss. Made the piston assembly and connecting rod with their lock nuts. The drawings indicate that the piston rings to be 0.030” larger than the cylinder bore. For such a small bore that amount of compressed is way too much. So I am going to use something that I have used on my other steam engines. It is graphite impregnated cord. I will make multiple wraps around the piston ring groove until I get the desired height.
Till later, Larry
Had the covid twice, second time not bad at all. First time was irritating and the breathing prob lasted 6 weeks after the covid was over.
 

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