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Home Model Engine Machinist > Building Them > Engines From Castings > Rudy Kouhoupt's Open Column Steam Engine - Cast & Double Size

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Old 03-18-2018, 10:47 PM   #91
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Coming along nicely


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Old 03-19-2018, 10:49 AM   #92
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I admire your tenacity.

Dave
The Emerald Isle


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Old 03-25-2018, 08:41 PM   #93
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Today was dedicated to machining the flywheel. This is really the first time I've machined zinc. It was quite enjoyable. The chips were small and not stringy. I've added a short video of an OD pass to show. It cut easily and it shiny. Good stuff.


No need for a bunch of descriptions here. The photographs should be self-explanatory.

...Ved.
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Old 04-08-2018, 07:13 PM   #94
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It took four tries at making the valve, but I finally got the engine to somewhat run.

Being single acting engine with the rotating face valve that Rudy K. designed, this engine will never make real power.

But hell.. IT RUNS!!!!!!!!!!!!!!

I hope that as it breaks in it will improve. Though the biggest issue is for such a large diameter piston, the porting is small. Therefore the 180-190 degrees of non-powered movement is restricted by the exhaust valve ports making the engine far less efficient. The small porting also contributes to the jerky motion.

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Old 04-08-2018, 07:18 PM   #95
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After my successful test run it's time to disassemble the engine for painting.

My wife wasn't too keen on painting it because she wanted the raw cast surface to show people that I was one who make the castings.

But alas, this is my hobby. Not hers. So we have paint. This time I went for blue.

Instead of a rattle can, I went with a brush this time. With a brush I hope I can control the edges a bit better and fill in the rough casting surface a bit.



That's it for this week.

...Ved.


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