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Old 02-14-2018, 07:43 PM   #1
Brian Rupnow
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Default Brian does Ridders flame eater

I ordered up the newest Jan Ridder flame-eater design, and have modeled it all this morning. I have changed metric plate and shaft sizes to the nearest imperial (inch") size that is available and commonly used. This involved juggling a few parts around to compensate for minor differences in dimensions. This is the new design using a stainless cylinder and graphite piston and internal valve. These flame eater engines are notoriously dirty due to soot in the flame being sucked into the cylinder and resulting condensation. I am not in any great hurry to make this engine, but I know how that has worked out in the past. The amount of time I spend in my machine shop is in direct proportion to how much "real" work I have in any given week. ---Brian



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Old 02-15-2018, 01:39 AM   #2
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Oh come on Brian. You'll have this thing done in no time. When you start a project, you tackle it like a fly on stink.

...Ved.


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Old 02-15-2018, 10:22 AM   #3
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Brian, I did one of these a few years ago. It works but was very tempremental to get going. If I can do it I'm sure yours will be up and running in no time. Good luck with the build. My effort ***HERE*** a rather poor video I'm afraid...
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Old 02-15-2018, 12:52 PM   #4
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Brian, I did one of these a few years ago. It works but was very tempremental to get going. If I can do it I'm sure yours will be up and running in no time. Good luck with the build. My effort ***HERE*** a rather poor video I'm afraid...
John
John, I see you used brass for the internal valve. What material for the piston?

Brian... same question.

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Old 02-15-2018, 01:13 PM   #5
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Started off with cast iron for both valve and piston but with all the condensation it quickly rusted/gummed up. Changed both the valve and piston to brass which is an improvement. Jan reccomends graphite but I never tried this. The cylinder is stainless (no idea what grade I happened to have a bit the right size!) machined quite well though, I managed to make the flame hole too long, confused end and centre measurements, probably another reason for it being tempremental. This is the early version, the later one has a larger bore.
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Old 02-15-2018, 01:38 PM   #6
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I will be using graphite for piston and valve, 316 stainless for cylinder.---Brian
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Old 02-15-2018, 03:08 PM   #7
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One surprising thing about this engine is how few parts it actually has. I have never worked with machineable graphite, in fact right at the moment I don't even know where to get it, but like everything else, I will find out as I go along.
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Old 02-15-2018, 03:39 PM   #8
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One surprising thing about this engine is how few parts it actually has. I have never worked with machineable graphite, in fact right at the moment I don't even know where to get it, but like everything else, I will find out as I go along.
For what it's worth, I just ordered a 1.250 X 12 inch bar of JC3 graphite from this outfit: http://beckergraphite.com/stock-graphite-rods/
$16.00 plus shipping... You have to place order by phone.
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Old 02-15-2018, 06:00 PM   #9
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Thank you Russ--I may give them a call.--Brian
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Old 02-15-2018, 06:19 PM   #10
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I have enough brass left over from the power cylinder on the Stirling engine to make a flywheel for the flame eater engine. I picked up 6" of 1 1/2" 316 s.s. for $14 this morning. I also picked up some "real" work today, so now I get to do the great balancing act.


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