GWR Chairs

[Stephen Freeman]

I have been busy in Freecad producing a range of chairs - still some way to go but here the initial results


SS Slide rail chair


rounded style of chair


00 chair - needs stretching yet

Squarer style of chair


Slab and Bracket ( I probably need to beef up the bolts a bit but not hard to do)

It is relatively easy to make at least some of the other chairs by combining STLS. The Slab & Bracket is made up of 3 STLs so possible to combine them in the required angle.


At the moment I have been concentrating on 7mm scale but of course the scale can be altered to suit other scales

 

[simond]

I prepared a set of GW chairs but was unable to load them onto the resources section, possibly because the models were too large - iirc, I had ten chairs on a print raft, but it might have been more.

I drifted off the project (which was to complement Templot plug track) because @martin_wynne has taken Templot to the next level with chairs printed on the sleepers/timbers. Templot does not yet have GW chairs, and whilst it is now open source, I’m not at all sure that my programming capability is up to generating chairs in software (and with a full time job…)

I’m happy to share what I prepared, there are images in my workbench thread. They were modelled in Solidworks native SLDPRT but I’m sure can be shared as IGES or STP

the story and more pictures are here:



Post in thread 'Templot Plug Track Developments'
Templot Plug Track Developments

 

[Stephen Freeman]

I prepared a set of GW chairs but was unable to load them onto the resources section, possibly because the models were too large - iirc, I had ten chairs on a print raft, but it might have been more.

I drifted off the project (which was to complement Templot plug track) because @martin_wynne has taken Templot to the next level with chairs printed on the sleepers/timbers. Templot does not yet have GW chairs, and whilst it is now open source, I’m not at all sure that my programming capability is up to generating chairs in software (and with a full time job…)

I’m happy to share what I prepared, there are images in my workbench thread. They were modelled in Solidworks native SLDPRT but I’m sure can be shared as IGES or STP

the story and more pictures are here:

View attachment 262220

Post in thread 'Templot Plug Track Developments'
Templot Plug Track Developments

Very nice but needs a key and the securing screw, I won't call it a bolt because I'll probably get in trouble, there is no nut involved. As far as I know my slide and ordinary chair accommodate code 125 Hi Ni. I haven't printed the ordinary one yet but the slide chair fits. The way that Templot generates chairs involves programming, something I am trying to not get involved with as I had enough of that sort of thing in a past life.

 

[Dog Star]

the story and more pictures are here:

View attachment 262220

Simon, very nice image.

I like that the chair does not include the key, your model allows for keys to be inserted left or inserted right, and by a different amount, as dictated by the usage of the individual prints. How about a separate print of the head of the chair screw thereby allowing for the "screw in chair" to be at random angles?

Scruff's Junction, using the S7 Group track standards, has much of the GW S&C chairs and fittings printed using an Anycubic printer with Siriya Fat Navy Grey resin, 3D CAD dwgs and STL files courtesy of another member of the S7 Group. Last count, the colliery tandem used approaching 30 different chair types/fittings.

Rgds, Graham

 

[martin_wynne]

I won't call it a bolt because I'll probably get in trouble, there is no nut involved.

For GWR it is a bolt. When the chair is used in pointwork it is inserted from above with a fang-nut on the underside of the timber. The visible part in the chair is then the bolt head.

When used in plain track sleepers, the bolt is inserted from below, and the visible part on top is then a square nut with protruding end of the bolt showing.

REA and REPW chairs are fixed with screws, not bolts. They are much more prominent than GWR fixings.

How about a separate print of the head of the chair screw thereby allowing for the "screw in chair" to be at random angles?

Templot-created REA chairs have random rotations on the screw heads. Likewise the rail-securing nuts on slide chairs.

Templot does not yet have GW chairs, and whilst it is now open source, I’m not at all sure that my programming capability is up to generating chairs in software

Simon, you don't need coding skills in order to add chairs to Templot. What you do need is to stop designing chairs in one piece. I can't seem to get this point across to folks. Each of these coloured elements needs to be designed in its own separate STL file:

Except that the brown key and pink "grip" parts do not need to be designed. Templot will insert those itself (and in the process make all necessary adjustments for the current model rail section in use).

Everything should be designed in full-size inches, and Templot will scale it to model size as required.

More info and the current state of play on the Templot Club forum.

cheers,

Martin.

 

[simond]

For GWR it is a bolt. When the chair is used in pointwork it is inserted from above with a fang-nut on the underside of the timber. The visible part in the chair is then the bolt head.

When used in plain track sleepers, the bolt is inserted from below, and the visible part on top is then a square nut with protruding end of the bolt showing.

REA and REPW chairs are fixed with screws, not bolts. They are much more prominent than GWR fixings.



Templot-created REA chairs have random rotations on the screw heads. Likewise the rail-securing nuts on slide chairs.



Simon, you don't need coding skills in order to add chairs to Templot. What you do need is to stop designing chairs in one piece. I can't seem to get this point across to folks. Each of these coloured elements needs to be designed in its own separate STL file:

Except that the brown key and pink "grip" parts do not need to be designed. Templot will insert those itself (and in the process make all necessary adjustments for the current model rail section in use).

Everything should be designed in full-size inches, and Templot will scale it to model size as required.

More info and the current state of play on the Templot Club forum.

cheers,

Martin.

Thanks Martin,

I don’t think we’ve ever discussed it, and I didn’t bump into the STL description in my forays into the Club forum, but no matter. I suspect I can very easily create the necessary STLs (any scale you like, full size inches, no problem) from what I have already done, so I’ll happily have a go. That said, I might need help…

Can you guide me to a starting point?


cheers
Simon

 

[simond]

Simon, very nice image.

I like that the chair does not include the key, your model allows for keys to be inserted left or inserted right, and by a different amount, as dictated by the usage of the individual prints. How about a separate print of the head of the chair screw thereby allowing for the "screw in chair" to be at random angles?

Scruff's Junction, using the S7 Group track standards, has much of the GW S&C chairs and fittings printed using an Anycubic printer with Siriya Fat Navy Grey resin, 3D CAD dwgs and STL files courtesy of another member of the S7 Group. Last count, the colliery tandem used approaching 30 different chair types/fittings.

Rgds, Graham

Thanks Graham,

separate nuts/screw heads are of course easy to do. You’ve seen that I did some for Mike on t‘other channel, but my inclination is to spend some CAD time helping generate GW chairs for Templot as I can then profit from COT track. It’s the “30 types” that puts me off, that and my lack of specialist knowledge.

I did generate chairs with keys, both left and right, much as the C&L sprues. I didn't do “different amounts”

best
Simon

 

[Bigjohn]

SimonD…. Where’s the GWR ON THE CASTING……………….ill get my coat…………
In jest BigJ

 

[ChrisBr]

Like this?

 

[simond]

Show off!

 

[Dan Randall]

Like this?
View attachment 262397

I’m guessing the date of manufacture is on the other side and that BR(W) chairs are also an option?…


Regards

Dan

 

[ChrisBr]

I’m guessing the date of manufacture is on the other side and that BR(W) chairs are also an option?…


Regards

Dan

Not done BR(WR) but wouldn't take much....

 

[Dog Star]

Chairs from my local foundry (read as "print shop") often include the mnemonic for the chair type so helping the budding track builder to chair his/her turnouts correctly...

...unlike a heritage railway to the west of London where a recent relaying has a 2C chair used where one would expect a 2S chair... and a 2S chair used to support the wing rails in the 2C location. Further, most of the chairs supporting the adjacent stock rail are 180 degrees out of position and the stock rail is inside keyed... the rail is inclined outwards so wheels are running of the corner of the rail.....

Maybe some folks should use Templot.

Rgds, Graham