Author Topic: Lehmann Stirling Engine  (Read 4759 times)

Offline yogi

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Lehmann Stirling Engine
« on: December 20, 2018, 10:20:20 PM »
In this series I will be documenting the build of a Lehmann Stirling engine from plans by Ernst Vogt.

The project was started 20 years ago. But as so many things in life, priorities change, and so this project ended up being mothballed shortly after I started building it. It was safely stored away all this time in my brotherís workshop.
During a recent visit to my brother and family, I decided to resurrect this engine and take it home with me to continue and finish the engine.

Iíll start this build log with an overview of the parts that I have so far.

The main cylinder housing is made from 100mm square tubing, and is mostly completed. Whatís missing is the cylinder tube. I had one made, but for some reason it ended up being not round and needs to be remade.







The hot end:







For the flywheel, I got some help from my other brother (I have two). At the time, he was working on a large multi task machine, and he machined the flywheel for me. It is not completely finished yet, as it needs to be bored out and the outside diameter finished up.





The big pieces together gives an idea of the size of the engine.



The two part cast iron piston:







Bearing blocks:





Some brass parts. The oil cups are not finished and I might remake them anyway. Not decided yet.



The coolant reservoir:







Iíll be spending some time to work myself back into the project. Iíll also be inspecting the parts and start to plan how to proceed with the build.

I hope youíll be along for the journey and stay tuned for more.

Yogi


Offline tvoght

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Re: Lehmann Stirling Engine
« Reply #1 on: December 20, 2018, 10:33:03 PM »
A very interesting project. I will be watching.
--Tim

Offline Ye-Ole Steam Dude

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Re: Lehmann Stirling Engine
« Reply #2 on: December 20, 2018, 10:41:01 PM »
Hello yogi,

That is a great looking engine and will be following your build.

Have a great day,
Thomas

Offline 10KPete

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Re: Lehmann Stirling Engine
« Reply #3 on: December 20, 2018, 11:27:07 PM »
 :popcorn: :popcorn:

Pete
Craftsman, Tinkerer, Curious Person.
Retired, finally!
SB 10K lathe, Benchmaster mill. And stuff.

Offline Dave Otto

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Re: Lehmann Stirling Engine
« Reply #4 on: December 20, 2018, 11:37:37 PM »
Cool project Yogi, I'm looking forward to following along.

Dave

Offline crueby

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Re: Lehmann Stirling Engine
« Reply #5 on: December 21, 2018, 12:18:18 AM »
Thats quite an impressive engine, looking forward to seeing you finish it up.


 :popcorn:

Offline b.lindsey

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Re: Lehmann Stirling Engine
« Reply #6 on: December 21, 2018, 12:52:31 AM »
Looks like you got more than a good start on it, however long ago it was. Nice looking project!!

Bill

Offline Dave Otto

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Re: Lehmann Stirling Engine
« Reply #7 on: December 21, 2018, 01:20:27 AM »
I remember from one of the GEARS shows a a few years back one of the guys displayed a similar engine, maybe it's the same engine that you are building?

Dave
« Last Edit: December 21, 2018, 01:32:42 AM by Dave Otto »

Offline PJPickard

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Re: Lehmann Stirling Engine
« Reply #8 on: December 21, 2018, 02:28:01 AM »
I will be following for sure...where can one get the plans?? I've been interested in this engine for  a while.

Paul

Offline Ian S C

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Re: Lehmann Stirling Engine
« Reply #9 on: December 21, 2018, 02:31:35 AM »
Looks interesting Yogi, I'll be watching this one.
ian S C

Offline yogi

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Re: Lehmann Stirling Engine
« Reply #10 on: December 21, 2018, 02:13:55 PM »
Thank you guys for the kind comments, and following along.  :cheers:

Dave, that engine seems very similar as it's a Lehmann type stirling, and about the same size. I see enough difference though, that I can tell it's not the exact same version.

Paul, it looks like the plans are still available: http://dampfmodellbauer.de/webshop/product_info.php?products_id=39

Yogi

Online Roger B

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Re: Lehmann Stirling Engine
« Reply #11 on: December 21, 2018, 05:36:03 PM »
That's quite a size  :) I will be following along  :ThumbsUp:  :ThumbsUp:  :wine1:
Best regards

Roger

Offline fumopuc

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Re: Lehmann Stirling Engine
« Reply #12 on: December 21, 2018, 08:22:58 PM »
Hi Yogi, what is the future job of this engine ? To open and close your garage door ?
Kind Regards
Achim

Offline PJPickard

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Re: Lehmann Stirling Engine
« Reply #13 on: December 21, 2018, 09:44:06 PM »
Yogi,

Thanks, it's funny I spent a LOT of time looking for plans for Lehmann and never found that link. Now to see if I can figure out how to order from there.

Thanks for the help!
Paul

Offline tvoght

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Re: Lehmann Stirling Engine
« Reply #14 on: December 21, 2018, 10:51:19 PM »
I don't think anyone has posted a link to this video yet:

<a href="http://www.youtube.com/watch?v=mgIkP0eCKlo" target="_blank">http://www.youtube.com/watch?v=mgIkP0eCKlo</a>

--Tim