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Barclay rods done. Much swearing and breaking of tiny drills.


PhilH

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I finally completed the coupling and connecting rods for the 7mm Barclay tank which I am attempting to complete. The history of this loco was that it was purchased on this forum as part of a job lot which comprised of the Barclay, some Peco track, a Marcway point, two Slaters wagons and a Connoisseur NE 4 wheel brake (all 7mm). The kits have all been started, but I think that the person in question (no longer on this forum I believe) perhaps decided that it was all a bit much for him and gave up on the project.

 

Anyway I decided that as there was not a complete set of rod etches included that I would make some myself. I will have to do some for a part built Q1 which another member of the forum has kindly given me, so I thought that being used to making these things for 5" locos I'd give it a go. Oh boy. It's been a trying exercise to say the least, in particular as the machinery I have is geared up for much bigger things.A good example are the brass bearings which are 2.5mm dia over the body - trying to make these in my Colchester produced a lot of swarf and bad language as they pinged all over the workshop. Similarly trying to drill 0.7mm holes for the cotter pin representations nearly led me to abandon the whole project, drills breaking left right and centre in my large drilling machine and remaining stuck in the work - hence one of the rods has no cotter pin stubs.The wheels run freely without binding when the rods are fitted so at least I got the hole spacing right. They didn't turn out as well as I hoped they would, but never mind.

 

The next job will be to try and sort out the slide bar / motion plate etches and the whitemetal crosshead / piston rod, which are both twisted and distorted, this will give me a complete running chassis to which I will then fit the motor and hope for the best. I'm undecided whether to leave the chassis as built, which is rigid, or give it a bit of vertical movement by elongating the bearings slightly and springing it by having some wire bearing on the axle.

 

Hopefully a couple of photos

 

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Thanks both for the interest. I've been following the great debate, I know that once I get past the Barclay I'll have to look at springing or compensating the next 7mm models that are in the pipeline. I suppose the only consolation is that although there are difficulties of working in 7mm as described previously I know that I have the materials and tools to remake if I cock things up. I think I will be looking for the simplest method there is.

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Well done Phil on making the rods. That's a very satisfying achievement.

 

At the risk of being shot at dawn, there is no requirement to spring or compensate 'normal' finescale 7mm locos. If the chassis is built square, and careful attention is paid to tracklaying, they will run fine with a rigid chassis. My last loco was an all singing, all dancing fully compensated A3. My current loco on my blog is a rigid 0-6-0. There is no difference in the running quality.

 

Richard

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Well worth the effort Phil, lovely workmanship.

 

5" gauge stuff will be a dodle after machining small lovely's like this. ;)

 

Darren.

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A good job Phil. I know it's not the same, but trying to edit my railway video archive that I have filmed over the last twenty years or so produces just as much "blue-air" as your machining! Terence.

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