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Small ROBINSON Engine ... Running, but NEED HELP !

 
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olivapor


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Joined: 23 Aug 2012
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Location: France, near Paris

PostPosted: Wed Mar 15, 2017 9:23 pm    Post subject: Small ROBINSON Engine ... Running, but NEED HELP ! Reply with quote

Hi guys

Here is a short test of my little Robinson ...

I like very much Robinsons ... I think they are very elegant machines !

A HUGE THANK YOU to Odilon, who helped to get this one !


I posted it in the video section, because I had a success run ...  

Well, that happened after few unsuccessful tests, and I was not able to run it again !

If you can share advice,  tips ... to help that would be great !  




I tried these  ...

oiling, not oiling ...
( as the whole thing seemed to be VERY tight ... )

a larger burner ... actually, this runs is with my Heinrici's burner...

top of flames closer to bottom of chamber... I raised the burner of , say , 1 cm ...


I filled the tank ??? with cold water ...

I am unsure this was intended for  ...
Some Robinson features shilling tank, to use with a pump ... but for this one I am not sure...
The small screw of side doesn't seem to blank the tank ...      

At last, I loosened the axle with all rods ... as I thought it was some tight too ...

Then, after 185 pinches on the wheel, it started to run !
( and smoothly ! )
I just had time to grab my camera ... as a proof !

( and this is why I stopped , because I was about to spread rod and nut everywhere ... )


I screwed the flying nut back, but I had no further success to run it again ...

Any idea will be welcome, than you !
As for maker, unknown to me ...

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Olivier

WANTED  , Dead or Alive  :
- Schoenner Stirling
- Robinson Stirling
- Exotic Weeden(s)  ...

Stay tuned for scenes of my next episodes ... on my  "Tube Pages" :

https://www.youtube.com/user/Steamania91/videos
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Stilldrillin


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Joined: 06 Feb 2007
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Location: Staveley, Derbyshire. UK

PostPosted: Wed Mar 15, 2017 10:46 pm    Post subject: Reply with quote

Olivier.
That is made from a Polly Models, casting set......

Like this one..... http://www.steves-workshop.co.uk/...models/robinson/robinsonindex.htm

Some Forum chat..... http://modelsteam.myfreeforum.org...32786.html&highlight=robinson

My saga.... http://madmodder.net/index.php?topic=3555.0

And, return..... http://madmodder.net/index.php/topic,8365.0.html

After all that..... Mine is still running very well.  
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andycrazy


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Joined: 28 Jan 2015
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Location: Goole, East Yorks, England

PostPosted: Thu Mar 16, 2017 6:02 am    Post subject: Reply with quote

Its a lovely engine, I like Robinsons, they are great to watch running.  I hope you get it sorted.
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MrDuck


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Location: Sweden, Uppsala

PostPosted: Thu Mar 16, 2017 12:07 pm    Post subject: Reply with quote

It looks ni e running. Perhaps it's just a personality issue? I know a couple of engines who got that
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olivapor


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Joined: 23 Aug 2012
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Location: France, near Paris

PostPosted: Fri Mar 17, 2017 8:57 am    Post subject: Reply with quote

Stilldrillin wrote:
Olivier.
That is made from a Polly Models, casting set......

Like this one..... http://www.steves-workshop.co.uk/...models/robinson/robinsonindex.htm

Some Forum chat..... http://modelsteam.myfreeforum.org...32786.html&highlight=robinson

My saga.... http://madmodder.net/index.php?topic=3555.0

And, return..... http://madmodder.net/index.php/topic,8365.0.html

After all that..... Mine is still running very well.  



Than you for your help , David  Thumbs up!

I already had a look to your topic(s) months ago ... but that is hi level technical machining langage ... and I need a dictionary every 5 words ...  
Now I have a Robinson I will have firther look    ...

Surprise is that it can run with a simple esbit tablet !
Certainly need further investigation ...


For now, I still do not understand what is the purpose of the side blank cap ...

It is linked to displacer chamber ? ...
_________________
Olivier

WANTED  , Dead or Alive  :
- Schoenner Stirling
- Robinson Stirling
- Exotic Weeden(s)  ...

Stay tuned for scenes of my next episodes ... on my  "Tube Pages" :

https://www.youtube.com/user/Steamania91/videos
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olivapor


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Joined: 23 Aug 2012
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Location: France, near Paris

PostPosted: Fri Mar 17, 2017 8:57 am    Post subject: Reply with quote

Thanks for support guys
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Olivier

WANTED  , Dead or Alive  :
- Schoenner Stirling
- Robinson Stirling
- Exotic Weeden(s)  ...

Stay tuned for scenes of my next episodes ... on my  "Tube Pages" :

https://www.youtube.com/user/Steamania91/videos
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Stilldrillin


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Joined: 06 Feb 2007
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Location: Staveley, Derbyshire. UK

PostPosted: Fri Mar 17, 2017 9:47 am    Post subject: Reply with quote

olivapor wrote:

For now, I still do not understand what is the purpose of the side blank cap ...

It is linked to displacer chamber ? ...


Picture?

Do you mean. Under the end of the power cylinder?
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olivapor


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Joined: 23 Aug 2012
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Location: France, near Paris

PostPosted: Mon Mar 20, 2017 6:46 pm    Post subject: Reply with quote

Stilldrillin wrote:
olivapor wrote:

For now, I still do not understand what is the purpose of the side blank cap ...

It is linked to displacer chamber ? ...


Picture?

Do you mean. Under the end of the power cylinder?



Sorry David, I missed your question !




This is about this very cap ...
I thought I could drain water from tank through this hole...
I was obviously mistaken ...    
_________________
Olivier

WANTED  , Dead or Alive  :
- Schoenner Stirling
- Robinson Stirling
- Exotic Weeden(s)  ...

Stay tuned for scenes of my next episodes ... on my  "Tube Pages" :

https://www.youtube.com/user/Steamania91/videos
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Stilldrillin


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Joined: 06 Feb 2007
Posts: 6529

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Location: Staveley, Derbyshire. UK

PostPosted: Mon Mar 20, 2017 10:59 pm    Post subject: Reply with quote

Oliver.
That is the blanked off, end of the tube, which links the displacer chamber to the power cylinder....

Some engines have a screwed in plug. To allow leakage, for speed controll.

I don't have a clear pic, of mine. The knurled screw, seals against the end of the pipe.......




The water fill/ drain, is the hole to the side of the power cylinder.
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olivapor


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Joined: 23 Aug 2012
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Location: France, near Paris

PostPosted: Mon Apr 03, 2017 9:09 pm    Post subject: Reply with quote

Stilldrillin wrote:
Oliver.
That is the blanked off, end of the tube, which links the displacer chamber to the power cylinder....

Some engines have a screwed in plug. To allow leakage, for speed controll.

I don't have a clear pic, of mine. The knurled screw, seals against the end of the pipe.......




The water fill/ drain, is the hole to the side of the power cylinder.


Thank you David !

So this is a sort of technical exit, in the casting ...
Could it be an optional way to add a leaking valve, so you can control speed ?    
( would certainly work on a hi yield machine ... )

I did not understand how could those stirlings allow variable speed ... ( my Wiggers ... )
Now I understand : they leak !  

My engine just features a small filling hole upon water tank , no cap.
Do you think it could run a long time without real cooling device ? ...

Your engine is equipped with a water tank... Did you made those improvements ?
Is there a water pump somewhere ?
( if not, what is the purpose of a water tank ? ... )

Thank you !
_________________
Olivier

WANTED  , Dead or Alive  :
- Schoenner Stirling
- Robinson Stirling
- Exotic Weeden(s)  ...

Stay tuned for scenes of my next episodes ... on my  "Tube Pages" :

https://www.youtube.com/user/Steamania91/videos
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Stilldrillin


Honorary Life Member


Joined: 06 Feb 2007
Posts: 6529

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Location: Staveley, Derbyshire. UK

PostPosted: Mon Apr 03, 2017 9:59 pm    Post subject: Reply with quote

Olivier.
I believe, a "leakage valve", is how the larger Robinson engines are controlled. As it would not be so easy, to fine controll the temperature, of the larger burner, in a larger engine.

I control mine, using the gas supply valve. Only a small flame is needed.

The small water volume, of the original design, (yours). Is only for a short while's running. (Maybe, 1/2 an hour).
Then, the water boils.......

I plugged the original water hole, and drilled/ installed the two pipe fittings. See here.... http://madmodder.net/index.php/topic,3555.130.html

The water circulates by thermo syphon.
Warmed water rises, up the sloping pipe, into the top of the tank. Cool water, from the bottom of the tank, rises up the other pipe. Into the engine....




During a show the engine will run, all day. The water, becoming warm, only......
_________________
David...... "Good `ere, innit!"  

Life happens, when you connect with people.
Not, constantly working to be better, or have more......
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olivapor


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Joined: 23 Aug 2012
Posts: 7712

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Location: France, near Paris

PostPosted: Mon Apr 03, 2017 10:07 pm    Post subject: Reply with quote

Stilldrillin wrote:
Olivier.
I believe, a "leakage valve", is how the larger Robinson engines are controlled. As it would not be so easy, to fine controll the temperature, of the larger burner, in a larger engine.

I control mine, using the gas supply valve. Only a small flame is needed.

The small water volume, of the original design, (yours). Is only for a short while's running. (Maybe, 1/2 an hour).
Then, the water boils.......

I plugged the original water hole, and drilled/ installed the two pipe fittings. See here.... http://madmodder.net/index.php/topic,3555.130.html

The water circulates by thermo syphon.
Warmed water rises, up the sloping pipe, into the top of the tank. Cool water, from the bottom of the tank, rises up the other pipe. Into the engine....




During a show the engine will run, all day. The water, becoming warm, only......


Thank you very much David for information

I did not know this thermo syphon phenomenon ...
Happy to learn something around midnight !  


Further enquiry is being planned to run properly my own engine ...  
_________________
Olivier

WANTED  , Dead or Alive  :
- Schoenner Stirling
- Robinson Stirling
- Exotic Weeden(s)  ...

Stay tuned for scenes of my next episodes ... on my  "Tube Pages" :

https://www.youtube.com/user/Steamania91/videos
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Maxwell


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Location: USA

PostPosted: Mon Apr 03, 2017 10:44 pm    Post subject: Reply with quote

Thanks to David & Olivier, I learned something new too. What a great thread.
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