Rack locomotive of 1812

[Eric CoxParticipant @ericcox50497]

The drawing and photograph of part 33 (piston rod) shows the rod being 3mm dia. with a 5.5mm dia lip. The text says the end should be turned down to form a shoulder. Which is correct.

[Eric CoxParticipant @ericcox50497]

[JasonBModerator @jasonb]

I would say that the shoulder and lip are the same thing, the short end being turned to suit the 6ba thread.

 

Jason

[Eric CoxParticipant @ericcox50497]

The end is turned down for the 6BA thread but from a 3mm Dia. bar, so where does the 5.5mm come from.

[JasonBModerator @jasonb]

If you look at the drawing and the photo there is a 5.5mm dia flange thats 1mm thick and 11mm from the the end. You will either have to it from 7/32 reducing teh ends to 3mm and 0.110 or silver solder a flange onto some 3mm rod and just turn the top down to 0.110 for the 6BA thread.

 

I assume the cross head bears against this flange and is retained by the 6ba nut

 

Jason

[John Stuart 1Participant @johnstuart1]

On the boiler drawings in ME is there an error on the measurements of the bosses as the numbers just don’t add up, I have moved the safety valve bosses to 15mm from the ends of the boiler, next also on the boiler layout the fire tube/box  is 6mm longer than the boiler and I imagine the fire box door sits on this 6mm but on the drawing it shows it the other way around, has anybody got any thoughts on this.

John 

[Eric CoxParticipant @ericcox50497]

Another anomaly shows the pins on the track at 15.52mm but the text states 16.00mm.

Which is correct.

[John Stuart 1Participant @johnstuart1]

If like me you have found great difficulty in tracking down the 22mm part cross over and almost given up as it’s made from 100% unobtainium and only bought in a pack of 10 to special order, I fell lucky today and found a local firm with 4 on the shelf at low cost so if like me you were having trouble I can share the information as to the whereabouts (north west) or even post you 1 if need be.

John 

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