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Northumbrian Frames are wrong!

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Chris11/08/2009 20:17:08
87 forum posts
13 photos
I have just discovered on a different section of this site that it has been confirmed that the drawings for the frames were indeed wrong and anyone who has made them to the existing drawings is faced with a fresh start.
My thanks in particular to JasonB who has helped so much in sorting out this problem No way could I have argued the case in the knowledgable way you did Jason.
I am adding this thread to inform others who perhaps like me have been making daily visits to this section hoping for a reply when the discussion has been raging on in the Model Engineer section.
Chris.
JasonB13/08/2009 07:22:38
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25215 forum posts
3105 photos
1 articles
See here for the revised drawing
Peter Hartmann14/08/2009 08:54:53
2 forum posts
I have already made the frames, they are too short now. Could the problem be solved by making the rods for piston and valve shorter? Has anybody got an idea?
Peter
Chris14/08/2009 09:23:36
87 forum posts
13 photos
Hi Peter,
I too have made the frames and asked a simailar question of Jason somewhere on the footplate thread. The answer I recieved was scarey to say the least and included shortening the boiler among many other things.
It's a pain but I started marking out a new set of frames last night. The originals are destined for the 'black museum'.
Regards, Chris.
David Clark 114/08/2009 10:06:06
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3357 forum posts
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10 articles
Hi There
You culd modify as you go but you would need to move the cylinders forward to clear the trailing wheels, shorten the firebox, maybe shorten other things.
A competent model engineer could almost certainly do this but rather than risk introducing more errors, the decision was taken (very reluctantly) to tell readers to make new frames.
 
regards David
 
John Willman09/12/2009 11:25:32
3 forum posts
My twelve year old son had just put the last rivet in thehorns when it was announced the frames were too short.As this represented a huge effort for his fist engine I could not ask him to start again.Making a new set  for him was rejected as it would no longer be his work,so Itried welding in a short section, and this seems to be successful. I am hoping the paint will hide it.
      yours John
 

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