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IndianaRog
Steam Legend!!
Joined: 26 Dec 2006
Posts: 6167
Location: Indiana, USA
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 Posted: Wed Jun 04, 2008 7:40 pm Post subject: |
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Yes, as soon as I paid the man I got to keep it!!!
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James
Site Admin
Joined: 26 Jun 2006
Posts: 26156
Location: Nr. Gainsborough, Lincolnshire, England.
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| Posted: Wed Jun 04, 2008 8:00 pm Post subject: |
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Wow Rog! A thing of beauty 
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IndianaRog
Steam Legend!!
Joined: 26 Dec 2006
Posts: 6167
Location: Indiana, USA
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| Posted: Wed Jun 04, 2008 8:01 pm Post subject: |
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Just posted a video of it in operation....
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Steve_S
Steam Legend!!
Joined: 26 Aug 2006
Posts: 3222
Location: Leeds UK
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| Posted: Wed Jun 04, 2008 10:43 pm Post subject: |
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| Rog, could you explain a little more how the tilting piston exhaust works? I've looked at the video and it obviously works very well, but I haven't quite understood how! |
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rangerssteamtoys
Steam Legend!!
Joined: 17 Jul 2007
Posts: 2126
Location: Houston Texas, USA
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| Posted: Wed Jun 04, 2008 10:48 pm Post subject: |
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| Steve_S wrote: | | Rog, could you explain a little more how the tilting piston exhaust works? I've looked at the video and it obviously works very well, but I haven't quite understood how! |
Neither Have I.
My best guess is that the cylinder is like a very thin oval. when it gets to the top of the stroke, it lifts up and lets steam out. Even at this it still doesnt make sense.
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IndianaRog
Steam Legend!!
Joined: 26 Dec 2006
Posts: 6167
Location: Indiana, USA
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| Posted: Thu Jun 05, 2008 12:59 am Post subject: |
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| Steve_S wrote: | | Rog, could you explain a little more how the tilting piston exhaust works? I've looked at the video and it obviously works very well, but I haven't quite understood how! |
Holding the engine in my hand for a slow motion cycle, the piston is very short from front to back maybe 3/32" thick. When the con-rod rotates around the flywheel it tilts this short piston just enough that a thin gap appears on the top of the cylinder such that you could slip a thin matchstick between cylinder edge and piston's edge. Steam comes in tube feeding cylinder, pushes piston and then is released thru that gap.
Exceptionally simple concept, but I have never seen it used before on any sort of engine. Lance Erickson who built it told me his day job involves servicing aircraft engines. Perhaps this is an adaptation of a design used in piston fired airplane engines???
Simple, efficient but a bit messy as you can't contain the condensate, it just sort of mists everywhere!!! Still, I love the dang thing. I have one more of his engines I will share soon...powers a propeller using same concept!
Rog
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johnreid
Steam Supreme Being
Joined: 06 Sep 2007
Posts: 10699
Location: Friendship Indiana, USA
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| Posted: Thu Jun 05, 2008 1:05 am Post subject: |
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YOu know, it is a funny thing, but so often when you pay for soething you get to keep it, but not always.
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rangerssteamtoys
Steam Legend!!
Joined: 17 Jul 2007
Posts: 2126
Location: Houston Texas, USA
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| Posted: Thu Jun 05, 2008 11:47 am Post subject: |
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I see how it works now. I had he right idea in mind, just needed confirmation. So there is back pressure I would assume?
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Atticman
Steam Legend!!
Joined: 29 Oct 2007
Posts: 2098
Location: Gloucestershire
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| Posted: Thu Jun 05, 2008 1:17 pm Post subject: |
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Thats really impressive, is that engine turning on the fly, a nice extra touch of many.
At least it wont take up much room in the Temple either  |
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duncandumpertruck
Junior Member
Joined: 09 Jan 2008
Posts: 471
Location: Scotland
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| Posted: Fri Jun 06, 2008 10:54 am Post subject: |
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Nice looking engine Roger! Just out of interest, i think this is perhaps just my taste but do you think you'll replace the rubber drive belt for a spring? I do like the lampost! It must be a real compliment to have people come to you for your suggestions  I have one of the original thimbles like yours it's a nice dainty little item to have up on the shelves. |
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IndianaRog
Steam Legend!!
Joined: 26 Dec 2006
Posts: 6167
Location: Indiana, USA
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| Posted: Fri Jun 06, 2008 11:02 am Post subject: |
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Thanks guys...you can tell my love of little things of the mechanical kind remains strong!!
Ruairidh, I could probably use a 4.5 inch Jensen spring belt but have not tried it since the rubber one works well. The rubber version may in fact put less tension on the system and allow more energy to get to the generator. The rubber belt is just a black rubber band with cut ends joined by super glue. It is placed on there very loosely, but has excellent grip. I just might try a spring belt to see if it makes any difference.
So a Thimble has made it to your collection as well...we seem to have similar interest in Karstens and now Lineys!!!
cheers,
Roger
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duncandumpertruck
Junior Member
Joined: 09 Jan 2008
Posts: 471
Location: Scotland
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| Posted: Fri Jun 06, 2008 11:14 am Post subject: |
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| IndianaRog wrote: | Thanks guys...you can tell my love of little things of the mechanical kind remains strong!!
Ruairidh, I could probably use a 4.5 inch Jensen spring belt but have not tried it since the rubber one works well. The rubber version may in fact put less tension on the system and allow more energy to get to the generator. The rubber belt is just a black rubber band with cut ends joined by super glue. It is placed on there very loosely, but has excellent grip. I just might try a spring belt to see if it makes any difference.
So a Thimble has made it to your collection as well...we seem to have similar interest in Karstens and now Lineys!!!
cheers,
Roger |
I think it's the miniaturization of things that really gets me going. The Karstens particularly. Of course it was seeing them on your site that kicked me into motion for purchasing some! ibought the thimble around Christmas 2006, Have you noticed the newer ones are slightly more plain looking without the tapered base and missing the fins on the head? Still nice things though! I think you are right about the rubber belt, I was thinking more of aesthetics but it's efficiency that is better  |
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IndianaRog
Steam Legend!!
Joined: 26 Dec 2006
Posts: 6167
Location: Indiana, USA
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| Posted: Fri Jun 06, 2008 11:32 am Post subject: |
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[quote="duncandumpertruck
I think it's the miniaturization of things that really gets me going. The Karstens particularly. Of course it was seeing them on your site that kicked me into motion for purchasing some! ibought the thimble around Christmas 2006, Have you noticed the newer ones are slightly more plain looking without the tapered base and missing the fins on the head? Still nice things though! I think you are right about the rubber belt, I was thinking more of aesthetics but it's efficiency that is better [/quote]
Ruairidh, I have 3 of Liney's Thimbles and my first was also bought Dec. 2006, so it is probably identical to yours.
I did notice the later Thimbles sold as the standalone base model have been shaved down/simplified a bit. Perhaps Lance Erickson (builder) found he could get same performance with simplification and less brass consumed??? That simpler design is part of a propeller model I have but have not posted here yet...will do shortly...it works just as well on that model.
The Thimble at the core of the power plant on the other hand is actually a deluxe version with SS cylinder liner and tapered con-rod. I think Liney is constantly experimenting!
cheers,
Rog
ps...I love your Avatar with the boat...is it yours?
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kusuchi
Hero Steamer
Joined: 23 Jan 2008
Posts: 1659
Location: St Thomas, U.S. Virgin Islands
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| Posted: Fri Jun 06, 2008 5:43 pm Post subject: |
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That is gorgeous, Rog.
I would leap at that if another were available.
Don't suppose they'd be cheap though, scratch built to order. 
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