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My EMMA under construction

I intend to add pics of my progress.

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HobbyNut12/03/2013 22:22:14
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113 forum posts
93 photos

brass cylinder pieces.jpg

HobbyNut12/03/2013 22:22:43
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113 forum posts
93 photos

fabricated cylinder.jpg

HobbyNut12/03/2013 22:26:05
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113 forum posts
93 photos

I am going to machine the guides onto the valve chest.

I messed up with the cylider barrels, and I now have 1 3/16" bore and not 1 1/4". i doubt it will make much difference to me.

Ian S C13/03/2013 09:01:56
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7447 forum posts
230 photos

When you said you'd messed up, I thought perhaps you'd gone over, now that might have been a problem, but under all OK, done that myself. Nice work so far. Ian S C

HobbyNut14/03/2013 03:02:42
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113 forum posts
93 photos

Thank You. I made the OD of the barrel too small. the wall would have been less than 1/16" at 1.25 bore.

HobbyNut25/03/2013 21:19:07
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113 forum posts
93 photos

The cylinders are coming along.

cylinders .jpg

HobbyNut26/03/2013 15:27:47
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113 forum posts
93 photos

Last night I made up all the rod guides and fitted them. I thought that I may paint it green, so I tried out a bit. I don't like it much, it is too light, needs a darker shade I think.

painted cyl.jpg

Edited By HobbyNut on 26/03/2013 15:28:33

john kennedy 126/03/2013 16:56:42
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214 forum posts
24 photos

You're really pulling trees up now.Looks like you're level with the series.

I'm chewing the cylinders out of some cast iron weights,given to me by a farmer.

Does anybody know if the insulation recesses are necessary,or will they be ok left solid.Most people will use insulation but I wonder if that is because the recesses are already cast in,so they do it ?

I understand that the cols cylinders will take longer to warm up,but is that a big problem???

Hope someone can advise please. John

HobbyNut26/03/2013 19:16:41
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113 forum posts
93 photos

I am almost up to it. I have to make the slide valves and pistons yet. I will try the pistons tonight.

The slide valves will take a night or two. I only have a "FIRST" Mill drill that is 100% digit operated. My digits get a bit weary at times! The only electronic digital equip. in my shop are the calipers.

My lathe is a 30 y.o Hercus 9" swing x 40" centers.

HobbyNut27/03/2013 16:02:20
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113 forum posts
93 photos

piston.jpg

I did make 2 pistons last night. I was only able to fit the rod to 1, and fit it to the cylinder. lots of lapping etc. More than I imagined.

HobbyNut02/04/2013 15:36:30
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113 forum posts
93 photos

Made the slide valves and fitted them. The pistons and seals are also fitted.

sv milling cavity.jpg

valve.jpg

slide assembled.jpg

HobbyNut08/04/2013 15:56:51
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113 forum posts
93 photos

Back to making things from the latest installment.

The Cyl drain cocks under construction.

emma cyl drains.jpg

HobbyNut11/04/2013 16:31:31
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113 forum posts
93 photos

The drain cocks are now assembled and mounted on the cylinders. I made the connecting link and all the other little bits last night. No pics yet. I will take them tonight.

HobbyNut03/05/2013 16:49:12
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113 forum posts
93 photos

I am still working away. I used the 65000psi drill and file to make the motion pieces from the last installment.

motion plates.jpg

James Sutton22/07/2013 00:38:53
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18 forum posts
7 photos

Wish I had access to a water jet cutter like that. Would certainly speed up the plate work. I found a local machine shop with one but haven't made any contacts there to see if I can get some small run items done.

HobbyNut07/08/2013 15:24:39
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113 forum posts
93 photos

James, it is easier on them if you can give them a digital file of the pieces that you want. either a .dwg or .dxf.

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