Stothert and Pitt in 1/6th (and other) scales

[Jo]

I'm loving your detail shots tho' - they'll probably be enough to tip me over the edge.

Be warned I have about 150 of these as well as a full set of Anthony Mounts drawings that I have hand corrected from measuring our engine. Anthony is also looking forward to seeing this one built.

For the beam I would go with a steel plate cut to profile, drill for and solder in bosses for all the pivots and also solder on two steel strips for the top and bottom flanges, all done with silver solder.

Then run the moulding in brass, bend and soft solder in place. Bit hard to tell is it a convex quadrant moulding or a concave scotia moulding? If its concave then maybe cut a tube into 4 quadrants. The other way is to use a roundover or bull nose cutter depending on shape to cut the profile on the edge of a flat strip so its easy to hold and then cut it off with a slitting saw.

I already have a 5mm profiled steel plate, drilled for the center boss. One of the reasons I went for the Tee section with the slot was the fear of not getting the edge square, but as the gusset is 5mm thick I suppose I could pin it and  a flat section would be relatively easy to bend.

The technique using the brass insert you mention is what I did with the underside of the table 
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Yes it is concave.

Jo

[Jo]

For interest here this is the 1/12th scale casting set available from Cotswold Heritage:



As you can see all the materials come in individually numbered bags to help you identify what they should be for and the set of castings are:



And this is how my 1/6th scale engine looks today:



Hiding on top of one of the column nuts is my first attempt at hand cutting the flower pattern on on of the capitals

Jo

[steamer]

I see an extensive list of Model Engineer in the background.....

Dave

[Jo]

Just a couple, ok 48 years worth. What you cannot see is a full set of EIM .

Jo

[steamer]

 

I only have 30 years of Live Steam.......

[tel]

Be warned I have about 150 of these as well as a full set of Anthony Mounts drawings that I have hand corrected from measuring our engine. Anthony is also looking forward to seeing this one built.

  Keep 'em coming - I can always rush out and buy a USB stick!

[sbwhart]

Bin pondering the capital issue, how about cutting out an 8 petal flower from some 1/16" ish brass plate, give it a good aneal and fold it up round the core and soft solder it in place.

Stew

[Jo]

  The brass would have to be very soft. It might be worth an experiment, it is not as if it would cost much .

Jo

[Jasonb]

Jo get the spinning brass it will bend without a poblem. Stews method is much the same as the cutting from tube that I suggested but will probably be easier to cut it from flat rather than trying to do it on the end of a tube.

J

[tel]

now that is an idea that should work, cut it out of flat, roll it into a cylinder and ease the leaves out - why didden I think of that? Over to you CAD gurus for a pattern!

[sbwhart]

The brass would have to be very soft. It might be worth an experiment, it is not as if it would cost much .

Jo

In  past life I use to make millions of drawn brass tubes a week, out of 70/30 cartridge brass   ,  the secret of getting it nice and soft is to hold it at temperature (red hot) for a couple of minutes to let the grains reshape, it doesn't matter if you quench it or let it cool under its own steam, either way you'll end up with soft brass, you may have to bend part way then reaneal it all depending on how much it work hardens, and that depends on the type of brass

Stew
 

[tel]

AHA! More wisdom - cartridge brass!!!! I have a bucket of defunct 30-06 brass down there 'somewhere' - time for some experimenting.

[Jo]

9mm cartridge shells should work for the 1/12" scale engine but something a little thicker will be needed for the 1/6th scale.  Next common size, 35mm might be a bit difficult to come by . 

Jo

[tel]

Nah, the round bottom of the flower in 1/6 only needs to be 11.4mm - not far away from an '06 at all

[Jo]

Shows how little I know about real shooting. I was a shotgun lass in the past but with all the fussy, fussy stuff I sold the guns in the end.

Looks like I will have to talk to the guy I know in the local gun club for some empty cartridges .

Jo