Author Topic: Doppelmotor - Double Acting Stirling Engine  (Read 11199 times)

Offline Bob

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Re: Doppelmotor - Double Acting Stirling Engine
« Reply #60 on: December 01, 2020, 10:09:02 PM »
Nice work.

One question, does the piston float axially on the piston rod?

Bob

Offline Admiral_dk

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Re: Doppelmotor - Double Acting Stirling Engine
« Reply #61 on: December 01, 2020, 10:25:58 PM »
It runs very well but it sounds very energetic, like it would need a load and be able to pull it well too  :praise2:    :cheers:

Offline yogi

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Re: Doppelmotor - Double Acting Stirling Engine
« Reply #62 on: December 02, 2020, 03:16:10 PM »
Thanks everyone for the kind comments! It’s very much appreciated! :cheers:

Bob, no, it does not. Could be a potential problem with stacking tolerances, but worked out fine.


Yogi

Offline tvoght

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Re: Doppelmotor - Double Acting Stirling Engine
« Reply #63 on: December 03, 2020, 12:01:40 AM »
Outstanding work on this engine, Yogi! Do you intend to show your work on the gas burner(s) here? That's something I'd like to see.   --Tim

Offline yogi

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Re: Doppelmotor - Double Acting Stirling Engine
« Reply #64 on: December 03, 2020, 02:35:01 AM »
Thank you very much for the compliment Tim! :cheers:
Absolutely, I certainly will share the gas burners. I’ve already made some progress (just not enough for the forum yet ;D). Just be patient with me, the day job keeps getting in the way of my shop time...  ;)

Yogi

Offline Roger B

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Re: Doppelmotor - Double Acting Stirling Engine
« Reply #65 on: December 15, 2020, 11:15:28 AM »
Excellent  :praise2:  :praise2: As Per says it has a powerful sound  :ThumbsUp:
Best regards

Roger

Offline yogi

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Re: Doppelmotor - Double Acting Stirling Engine
« Reply #66 on: September 07, 2021, 11:29:28 PM »
Hello everyone,
I can't believe it's been so long since the last update. Apparently I'm not spending enough quality time in the workshop...  :D

Now for the gas burner: I purchased several cheap camping gas burners from eBay. The plan is to cannibalize those burners for the jets, burners and connection to the gas cartridge. What I have to make though, is a manifold to arrange the burners. I'll be using two of the small burners and the braided hose and adapter from the bigger burner.




I started on the manifold, by machining the end. The 1/8" hole is only started and not to full depth. The thread is milled as it is an unusual size.




To finish drill the 1/8 hole that will connect the two burners, I used a 6" long drill bit. That was quite the nerve wracking task. Patience, lots of lubricant and clearing the chips often is key here.




Next I machined the top side of the manifold. The internal and external threads are milled again.




Last operation was to mill off the remaining stock on the bottom and machine to final thickness.




The finished manifold:






The burner in action:




Thanks everyone for following along and stay tuned.
Yogi


Offline Dave Otto

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Re: Doppelmotor - Double Acting Stirling Engine
« Reply #67 on: September 09, 2021, 01:47:23 PM »
Nice looking part Yogi!  :ThumbsUp:

Dave

Offline Admiral_dk

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Re: Doppelmotor - Double Acting Stirling Engine
« Reply #68 on: September 09, 2021, 10:38:47 PM »
Looks like that double burner will fit nicely under the engine  :ThumbsUp:

Offline bent

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Re: Doppelmotor - Double Acting Stirling Engine
« Reply #69 on: September 13, 2021, 08:37:37 PM »
Looks great Yogi!

 

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