MadModder
The Craftmans Shop => Model Engineering => Topic started by: fcheslop on November 28, 2017, 05:03:27 PM
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Hi marra, a long time coming and still away to go but at least now a runner after doubting my sanity and some serious head scratching
Iv still two small binds to find and fit the piston packing and make a gasket for the hot cap once I managed to get some thickish material
A short video
The whole geometry has had to be changed and the crank moved by 6mm as well as the water outlet :doh: A new beam carved from a bit of round and a new bearing pedestal amongst other bit n bobs
Cheers and keep well
frazer
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Ohh.... Mate! What a sight for sore eyes! :bugeye:
After all the time, spent with me. Then, Yourself...
You've finally made a sow's purse, into a beautiful, silk ear. :thumbup:
Seven years ago..... http://madmodder.net/index.php/topic,3881.0.html
Then to you. Two n half years ago. Blummin, well done! :clap:
I guess, you're pleased, you stuck at it. Now...... :D
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Hi David, Its the first hot air engine Iv built for a long time that I wasna sure if it was going to run so very chuffed
Iv tightened up all the rather large tolerances on the original design (5 thou clearance ) but suffered doing it
Still have two small problems the pin in the rod from crank to beam wiggles sideways slightly as you rotate the engine .Spent hours trying to find it with no luck and the top left link pin has 3 thou clearance or it makes the piston bind
When looking at the engine the beam is slightly of center to the left this problem is what has caused most problems as the original builder placed the main bearing upright a good 1/4 inch to the right and Iv had to fit an extra main bearing now three ball bearing .By adding the extra the flywheel now has clearance and the water fitting has been re positioned
Im struggling to get round these two points and Im going to do the pump next then it canbe ran for a good length of time as at the moment its only very short runs as Im worried about the glue holding the liner into the water jacket over heating
All in all its been an education and can appreciate the struggles you have. It looks as good as when I got it :Doh: but now runs
Im not happy with the designed water pump its not to scale and the fire box as drawn for an oil/gas fired engine is also wrong .
Another update in about two years :D
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Ohh.... Mate! What a sight for sore eyes! :bugeye:
After all the time, spent with me. Then, Yourself...
You've finally made a sow's purse, into a beautiful, silk ear. :thumbup:
Seven years ago..... http://madmodder.net/index.php/topic,3881.0.html
Then to you. Two n half years ago. Blummin, well done! :clap:
I guess, you're pleased, you stuck at it. Now...... :D
My God has it been 7 years!
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Just a wee update of this very slow ongoing project
Best wishes
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Very nice! :beer:
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Just a wee update of this very slow ongoing project
Hello Frazer.
So sorry, for the very slow reply.
That looks, and runs great! You probably, have some paint on it, by now...... (http://smileys.on-my-web.com/repository/Respect/respect-061.gif)
I'm afraid, there is very little enthusiasm, this workshop season. What with one thing and another.
The heatwave hasn't helped, either.......
I have only been doing necessary jobs. Like the Moriya burner.
Too much heat transferred, between the alloy, surrounding base, and the alloy bodied original burner.
So... I bored out the alloy, as far as sensible. And recessed the wooden base......
(https://s25.postimg.cc/8jm7asrhr/IMG_20180719_140233856_HDR.jpg) (https://postimages.org/)
This, gave clearance, for a deeper, stainless bodied burner......
(https://s25.postimg.cc/o6dgnkxdr/IMG_20180719_140312650_HDR.jpg) (https://postimages.org/)
Which allows more room, for flame height......
(https://s25.postimg.cc/xcvrbg2sf/IMG_20180719_144443214.jpg) (https://postimages.org/)
Hope it will, now, keep on running. During heatwave show days, spent in the Papplewick boilerhouse.... (http://yoursmiles.org/tsmile/no/t2661.gif) (http://yoursmiles.org/t-no.php?page=2)
Bernhardt, is "finished". Now, with a measuring cup burner. Not the temporary one shown here.
Still can't stop the click, at tdc......
Take care, Marra..... :thumbup:
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Hi David, Iv only managed to make a tiled base for the Ericsson as I became side tracked and built another Ringbom like the one you have and made a few improvements that seem to make her a little less prone to the displacor sticking
Just a bit of 5/16 K&S tubing with two short bushes fitted instead of the long reamed bush used in youre engine for the displacors rod
I may do another Moriya as by the time I manage to wear these castings into shape it will be winter and to cold for this wimp to do any painting well thats my excuse and Im sticking to it and Im hitting the wall with it now it runs well the interest is going
Iv been finishing a few other bits n bobs that have been collecting dust for to long but like you struggling at the mo as the interest is dying and have thought about just packing it all in
I need to find something thats got more about it but no idea what
Bernhardh looks far better engineered and is running well just glad to see you have overcome the problems with it
Hope Moriya wasnt to rough as she it was my first born a long tome past
Keep well
cheers
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Wow that's a very solid looking engine, David! :beer:
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Thanks, Steve.
It's been two years in the Modding. Quite a big contrast, to the original doorstop.....
(https://s25.postimg.cc/43exfag2n/Boris.jpg) (https://postimages.org/)
Around 60hrs running time now. It will run happily, all day, at shows.... :thumbup:
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Wow David, that reminds me a lot of a Stirling I built for my father nine years ago on his 83rd birthday:
(http://www.sredmond.com/vtsteam/Stirling/No83-1.jpg)
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Nicely done Steve! And, a lovely sentiment.... :thumbup:
Wish my son, was the slightest bit, practical. :palm: