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Durham and north Yorks traction engine

Spectacle plate

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Richard Hudson 402/04/2018 11:59:02
3 forum posts

hello , I am currently building a 2" model of the Durham and north Yorks engine by John haining using the original series of drawings from the model engineer from 1978 I believe . I have just discovered I have lost the drawings covering the front spectacle plate and the ash grate. I was wondering if someone could tell me where I could obtain / buy the drawings or if possible copy or sell me the drawings I require. This would be very much appreciated thank you.

Tricky03/04/2018 10:05:11
22 forum posts
2 photos

I have sent you a personal message about this.

Richard

Centurian16/05/2018 15:24:14
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10 forum posts
2 photos

Iv'e recently started a 2" Durham & North Yorkshire traction engine using John Hainings drawings and construction notes. I am having a problem understanding the drawing of the Slide valve. If anyone has a photo of a completed one I would really appreciate seeing it. I am intending machining it from the solid not a casting.

Richard Hudson 417/05/2018 21:08:18
3 forum posts

Hi , I haven't got that far but I will look at the drawings and see what it looks like . I am not using any castings whatsoever and intend to fabricate the cylinder etc myself. I have made a steel boiler , wheels most of the gears, Spring boxes and horn plates. How far have you got yourself.

Boiler Bri17/05/2018 22:03:37
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652 forum posts
305 photos

Hello Richard

Have a look at my albums. I am just finishing a 4" version scaled up from the 2"

Brian

Centurian18/05/2018 02:41:35
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10 forum posts
2 photos

Hi Richard, I seem to have started at the other end so to speak. I bought the cylinder casting and have finished machining it. Other bits and pieces including all the gears and shafts I have made from scratch. I am currently fabricating the spring boxes and the next task is the horn plates. I am going for a copper boiler. The boiler rules in Australia are very strict and in order to build a steel boiler one has to be a coded welder. I am allowed to build a copper one under supervision. Unfortunately the materials have to come from the UK so there is a delay there, but still plenty to do. Have you built your wheels from heavy guage steel pipe as per the construction notes, or have you used a different method? I'm considering getting some flat bar rolled up and use laser cut annuluses for the internal rings. Australia has been metric for nearly 50 years so imperial sized pipe etc is not possible to get.

Richard Hudson 418/05/2018 17:23:20
3 forum posts

Hi centurion, I made my back wheels from heavy gauge boiler pipe, the front wheels are made from scrap steam turbine nuts which I machined down to size. The boiler is made from proper boiler tube from the power plant I used to work in . I increased the wall thickness to almost 1/4" and made the plates etc slightly thicker as well. Unfortunately as I am not a coded welder I cannot get anyone to give me a boiler certain as the laws here are very strict also . It's my fault as I should have looked into this more. In am a very good tig welder, having been taught by coded pressure welders and the boiler is a really fine thing that I have pressure tested to 200 psi with no problems and no leaks so I am confident it is ok for my own private use , it's just a bit frustrating! But the law is the law and I am well aware of what steam can do , being a steam turbine technician. I cannot for the life of me think how a a copper boiler soldered together in some ones workshop can be considered better or stronger than a correctly welded steel one , apart from the corrosion problems . I dare say mine will become a nice ornament in my front room !

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