Author Topic: Oscillating Engine Pivot Speculation  (Read 1929 times)

Offline Jasonb

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Re: Oscillating Engine Pivot Speculation
« Reply #15 on: December 19, 2017, 10:19:12 AM »
Could it be in a Tee book?

They would have to be drawing files, as I think we now have the problem that you won't be able to open my part files as I have taken advantage of the reduced rate to upgrade to the latest Alibre Pro from the new owners.  However 2D drawings would likely be more use to the hoarder I should think.

There are not that many parts to it so should be easy enough to draw and mine would be for fabrication rather than the original which looks like castings were used. Would be interesting to see the details though and I may well tweak mine a bit more.

Online Jo

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Re: Oscillating Engine Pivot Speculation
« Reply #16 on: December 19, 2017, 10:21:49 AM »
No the book predates Tee.

You will have to send me a file so that I can see if I can open it.

Jo
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Offline Zephyrin

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Re: Oscillating Engine Pivot Speculation
« Reply #17 on: December 19, 2017, 02:55:32 PM »

Wobblers are not "bona fide" steam engines, with expansion and compression issues...
there is never condensing or water lock problem with well made oscillating engines, even without springs !

in fact a wobbler will run with a stream of water or other incompressible fluid. 

In some oscillating engine, ports are greatly modified and/or an intermediary steam distributing plate is added, for resembling to a real steam distribution with lap and lead and so on...

 

Online Jo

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Re: Oscillating Engine Pivot Speculation
« Reply #18 on: December 19, 2017, 03:38:19 PM »
SMEE have another more detailed oscilator that is also on my to do list.

 ::)

Jo
« Last Edit: December 19, 2017, 03:49:25 PM by Jo »
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Offline Jasonb

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Re: Oscillating Engine Pivot Speculation
« Reply #19 on: December 19, 2017, 03:46:16 PM »
That's the one, you must have been looking at an old post on mine on that forum you don't like to visit ;)

I have several more images of it and think it is based on this old engraving.


Online Jo

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Re: Oscillating Engine Pivot Speculation
« Reply #20 on: December 19, 2017, 03:53:25 PM »
That's the one, you must have been looking at an old post on mine on that forum you don't like to visit ;)


:lolb: It was not difficult to guess as that is the only oscillator that the SMEE boys normally take to the shows.

I only visit sites where the members actually post about making model engines ::)

Jo
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Offline Gas_mantle

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Re: Oscillating Engine Pivot Speculation
« Reply #21 on: December 19, 2017, 04:18:48 PM »
Jo, do you have any idea what engine that SMEE oscillator is ?

I seem to remember seeing a youtube video of a very similar full size engine working in a museum, I can't find the video but knowing something about the model may help  :)

Offline Jasonb

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Re: Oscillating Engine Pivot Speculation
« Reply #22 on: December 19, 2017, 04:23:56 PM »
Peter, see my post above about what the engine is. that catalogue page is dated 1876

There is also a bit more mentioned about the maker of the SMEE one here

http://myweb.tiscali.co.uk/remark/pages/workshop/projects/models/walleng.html

Offline Gas_mantle

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Re: Oscillating Engine Pivot Speculation
« Reply #23 on: December 19, 2017, 04:33:56 PM »
Thanks Jason, I didn't see the text in the thumbnail photo.

The engine I seem to remember was used to pump water in a museum (or some preservation), I can't quite recall exactly but I think it was possibly the same engine or something very similar.

It's interesting to see the price list in your post - 50 for a full size 6" bore engine  :pinkelephant:
« Last Edit: December 19, 2017, 04:37:12 PM by Gas_mantle »

Offline Gas_mantle

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Re: Oscillating Engine Pivot Speculation
« Reply #24 on: December 19, 2017, 04:46:50 PM »
I found the video I was thinking of - but the engine is a lot different that I seemed to remember, its probably 2 yrs since I looked and memory fades.

Nevertheless it's quite an interesting little engine  :)



Offline Jasonb

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Re: Oscillating Engine Pivot Speculation
« Reply #25 on: December 19, 2017, 05:00:34 PM »
I remember watching that one while trying to find some details of teh valve gear on teh SMEE engien as that doe snot use an eccentric.

Have you got those cross head guides done yet? You need to get a move on as this one is ready for you to make ;)

Offline Gas_mantle

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Re: Oscillating Engine Pivot Speculation
« Reply #26 on: December 19, 2017, 05:10:56 PM »
Its funny you mention the guides, I had a little break while feeling a tad under the weather so concentrated on playing around with the boiler that didn't involve machining.

I've now been doing a bit more though - mounting the cylinder, making the piston, I'll update the build in a day or 2.

That base looks to be just the thing :-)