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Hot Air Engines Stirling engines, Rider-Ericsson and others.

Hot Air Engines

Jost Lampfan rebuild.


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  #1  
Old 12-09-2016, 07:32:03 AM
Rodelu Rodelu is offline
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Default Jost Lampfan rebuild.

I have just joined this forum.
Iím a retired machinist and have a decent machine shop at home, but have no experience whatsoever with hot-air engines.
Iím trying to rebuild a Jost Lampfan which, I have learned from searching the Web, has a single-cylinder, Beta-configuration Stirling engine.
I need drawings, exploded views, photos of a complete unit, anything that would help me reproduce the many parts that are missing or broken in the engine.
Iíll look into the fan proper if and when I get the engine to run.

I will greatly appreciate ANY help.
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Old 12-09-2016, 10:37:54 AM
robinson456 robinson456 is offline
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Default Re: Jost Lampfan rebuild.

Some pictures would be good. They made a # of different models and styles. Hope to see it running. Will help all I can. WES
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  #3  
Old 12-09-2016, 12:20:29 PM
Rodelu Rodelu is offline
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Default Re: Jost Lampfan rebuild.

Thanks for your reply.
I posted initially in the Gas Engines section by mistake, and included pictures.
For some reason I cannot attach pictures to my post in the Hot Air Engines section.
Please see my post, same heading, in the Gas Engines Section.
Thanks again.
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  #4  
Old 12-09-2016, 01:49:43 PM
Bill Hazzard Bill Hazzard is offline
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Default Re: Jost Lampfan rebuild.

Re-name your pictures and then you will be able to post them again.
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Old 12-09-2016, 02:34:37 PM
Rodelu Rodelu is offline
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Default Re: Jost Lampfan rebuild.

Pictures of my Jost Lampfan.
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Old 12-09-2016, 02:35:37 PM
Rodelu Rodelu is offline
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Default Re: Jost Lampfan rebuild.

Just one more picture.
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Old 12-09-2016, 03:19:00 PM
Ronald E. McClellan Ronald E. McClellan is offline
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Default Re: Jost Lampfan rebuild.

I've never heard the name Lampfan. I have a Jost Radio fan with a 32" blade. Behind it is a floor model Lake Breeze. Brent Rowell is the go to person for information on Hot Air engines and fans. Ron
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Old 12-09-2016, 07:52:46 PM
Brent Rowell Brent Rowell is offline
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Default Re: Jost Lampfan rebuild.

The 'Lamp fan' was one of Jost's earliest models made just prior to his patented "Radio Fans" which were initially gamma type engines with gear-driven brass blades. The company later simplified (and cheapened) the design with a gamma engine driving larger aluminum blades directly from the crankshaft. All of these fans were made by the Hubertus Raab Co. in Zeitz, Germany but sold by the Jost Co. based in Bombay, India during the British colonial period. I have one of these early examples which you can see here in the video:

https://www.youtube.com/watch?v=RtTNYiuS3iU

I'm sorry but I have no plans or drawings and as far as I know none exist. What parts are you missing?
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Old 12-09-2016, 08:09:35 PM
robinson456 robinson456 is offline
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Default Re: Jost Lampfan rebuild.

Believe this is what you have. think Brent Rowell has one of these. Very, very nice piece. add some pic hope it works
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  #10  
Old 12-09-2016, 08:12:23 PM
robinson456 robinson456 is offline
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Default Re: Jost Lampfan rebuild.

another pic WES
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  #11  
Old 12-09-2016, 08:28:07 PM
Brent Rowell Brent Rowell is offline
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Default Re: Jost Lampfan rebuild.

Yes, that first page has a photo of my fan. The drawing on the same page is for a Raab-patented linkage, but not the one used on this fan.
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  #12  
Old 12-09-2016, 10:49:49 PM
Rodelu Rodelu is offline
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Default Re: Jost Lampfan rebuild.

Quote:
Originally Posted by Brent Rowell View Post
The 'Lamp fan' was one of Jost's earliest models made just prior to his patented "Radio Fans" which were initially gamma type engines with gear-driven brass blades. The company later simplified (and cheapened) the design with a gamma engine driving larger aluminum blades directly from the crankshaft. All of these fans were made by the Hubertus Raab Co. in Zeitz, Germany but sold by the Jost Co. based in Bombay, India during the British colonial period. I have one of these early examples which you can see here in the video:

https://www.youtube.com/watch?v=RtTNYiuS3iU

I'm sorry but I have no plans or drawings and as far as I know none exist. What parts are you missing?
The fan in the youtube video looks exactly like the one I have.
I know now I'm missing the bell crank I see in the video.
There's one piston visible inside my cylinder with some bits of the bell crank still attached but the piston is seized in the cylinder and so is the rod that moves up and down inside the piston.
I'll know more if I ever get the piston free.

Thanks for your help.

---------- Post added at 11:49:49 PM ---------- Previous post was at 11:45:19 PM ----------

Quote:
Originally Posted by robinson456 View Post
another pic WES
Yes, that's it!
Do you know the meaning of the reference to the bell crank at the bottom of the English-language side of the page, with several two-pointed arrows and ending in "WP"?
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  #13  
Old 12-09-2016, 11:16:51 PM
Brent Rowell Brent Rowell is offline
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Default Re: Jost Lampfan rebuild.

Don't worry. I'll send you some instructions for getting those parts out. It should not be difficult.

---------- Post added at 10:16:51 PM ---------- Previous post was at 10:13:44 PM ----------

"WP" on the second page stands for "working piston" = power piston. That's the one that is stuck in your cylinder.
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  #14  
Old 12-09-2016, 11:26:10 PM
robinson456 robinson456 is offline
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Default Re: Jost Lampfan rebuild.

The 2 arrows between the parts basically mean the parts contect to each other. And the wp stands for working piston.
The brass displacer in your second pic should unscrew from the shaft that go thru the piston, this will make it easier to get the working piston out.
P.S. take your time.
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  #15  
Old 12-10-2016, 04:50:18 PM
Rodelu Rodelu is offline
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Default Re: Jost Lampfan rebuild.

Very nice photos in the attachment. I believe I can figure-out lengths for the arms in the bell crank using the flywheel diameter as a reference.
The displacer is unscrewed now so I can attack the piston from both ends.
Yes, I'll take my time and won't hurry the un-seizing process.

---------- Post added at 05:50:18 PM ---------- Previous post was at 05:45:53 PM ----------

Quote:
Originally Posted by Ronald E. McClellan View Post
I've never heard the name Lampfan. I have a Jost Radio fan with a 32" blade. Behind it is a floor model Lake Breeze. Brent Rowell is the go to person for information on Hot Air engines and fans. Ron
So the Lamp fan was powered by a lamp; am I to understand the Radio fan was powered by...?
Quite right about Brent. He has been extremely helpful and generous with his knowledge.
Thanks!
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