GSR Class 551 / J26 ECMbuild in 7mm

[murrayec]

Break gear coming together

Shoes cut out of Delrin for insulation purposes and the hangers from .5mm brass

Hangers marked out and holes drilled ready for cutting out

All the bits, including guard irons from .5mm brass, the fire grate front n sides and a little bit of grate detail in .5mm brass with rivets punched

Break shoes pinned onto the hangers, 1.2mm brass tube with .6mm id soldered into the chassis to take .6mm pins to hang the breaks off

Breaks test erected and joy-rigged at the lower end to work out the longitudinal break lever arms and cross fittings..... next

Eoin

Edited November 18, 2017 by murrayec

[Noel]

Just Amazerballs.  

Eoin you should be heading up the engineering division of the next SST project. Your engineering talents, design intelligence and resourcefulness know no bounds. 

[murrayec]

Just noticed when looking over this thread, after a long time, I describe the material for the break shoes as 'Delrin' it's not! it's Tufnol, a great material for the modeller. Made from wood/paper, it has great structural qualities, easy to be worked and can be machined.

Eoin

[Broithe]

58 minutes ago, murrayec said:

Just noticed when looking over this thread, after a long time, I describe the material for the break shoes as 'Delrin' it's not! it's Tufnol, a great material for the modeller. Made from wood/paper, it has great structural qualities, easy to be worked and can be machined.

Eoin

When I had a 'real' job, these materials were in widespread use We also had Paxolin and Permali, plus quite a few other more 'modern' composite materials.

Permali was particularly nice - resin impregnated beechwood plies. It is fantastically tough - and takes a beautiful finish.

Tufnol always struck me as a sort of artificial boxwood substitute, in the way that its properties were not directional at all, and it was so 'fine-grained' that almost any size/shape combination would be OK.

[PorkyP]

Tufnol is a great material, there's some used in the steering of the old Land Rover, and that takes some hammering..!

[Broithe]

You may have come across Dave Gorman the comedian?

I worked with his father, who I remember being a huge fan of Tufnol, to the point where it almost became a running gag in itself, long before his boy took up joke-telling for a living.

[murrayec]

I can just see you now- sitting around the billy can slurping the tae and swapping Tufnol jokes those were the days.......

Eoin

[Galteemore]

Yes. Little known fact that the Dubliners’ hit ‘the hot asphalt’ was originally titled ‘the hot Tufnol’....

’And if it doesn’t last for ever sure I swear I’ll eat me hat’....

kudos for a connection to Dave Gorman, though. And I have been looking up Tufnol to make brake blocks - laminating brass ones right now which I hate! 

 

Edited March 2, 2020 by Galteemore

[PorkyP]

I'm going to have to go and listen to some Dubliners now you've put that idea in me head...

[Broithe]

4 hours ago, murrayec said:

I can just see you now- sitting around the billy can slurping the tae and swapping Tufnol jokes those were the days.......

Eoin

He once had a twenty minute violent agreement with a chap, until I could stand no more and shouted at them until they finally understood that they were both saying exactly the same thing, but from opposite directions.

There is an amusing materials-based story involving asbestos, but I'll have to tell you that verbally one day, as it's not suitable for a public scenario...

[David Holman]

I thought he was an England spin bowler...