Gallery, Projects and General > Project Logs
French Beam Engine
doubletop:
Nick
As I think I had said earlier in the post, this guys plans are excellent and nicely detailed. I found one error on the crank and the dimensioning on the A frames wasn't sufficient that I had to re-draw them to work out the cutouts. (see attached). I also converted all the threads to BA as I have a stock of small head BA screws.
The place where things could go wrong, and I only realised this after I finished it and was reading an article on a grasshopper in a recent ME. The geometry of these engines is such that if it is not built accurately enough it can lock up as there is no cross head on the piston so there can be a tendency for it to cock over. The piston yoke is adjustable so I think that's where any errors are resolved.
That's two of his I've done now and will no doubt do another at some point.
Pete
PekkaNF:
--- Quote from: doubletop on June 06, 2011, 05:40:36 PM ---Pekka - An oil can; I squirted a lot of oil on all the joints and then ran it on air for about an hour. Degreased and cleaned it all up and then a little more oil and a coat of WD40. Its going to spend more time sitting around looking pretty than running, so will be oiled as and when it needs it.
--- End quote ---
What kind of oil do you use? Does it leve any solid residue and gunk up when left alone long time? I have had bad luck with so called sewing machine oils. Some g#n oils dried up too.
One further question about cylinder lubrication: Do you have a mist lubricator on pneumatic line or do you spray a little of oil before each run and spin it before power up?
Pekka
doubletop:
I used mountain bike "wet" cycle oil, as that is what I had. I just gave a generous squirt down the inlet port before I connected the airline. It wasn't on there very long as I cleaned up after the run and then sprayed with WD40. If I build a boiler I'll make a displacement lubricator like the one on this other engine of mine (which incidentally is also from JP Duval plans)
John Bogstandard provided the link for the lubricator to me some time back
--- Quote ---
http://www.roundhouse-eng.com/faqs.htm#14
Go down the page on here, and it shows everything you need to make a working displacement lubricator. You can make either the inline or offset, they both work as well as each other. You could even modify it a bit and put a drain in the bottom, to save having to use a syringe to get the water out.
http://modelsteam.myfreeforum.org/ftopic7859-0-asc-15.php
--- End quote ---
Pete
nel2lar:
It down right sucks when people use photo host to use their photo and when something happens the PICS disappear. It should be a must that the group take control over all photos that they stay intact or delete the whole thread.
That is my rant, Good day
Nelson C
Not the other Nelson
awemawson:
It's a difficult one Nelson. I was always banging on about not using external hosts but keeping photos on the forum server even before the debacle with a well known photo host site.
But some threads whose pictures have been lost this way still contain useful information in the text so just to delete such threads would be a shame.
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