Gaps between the stock rail and the safety rail and gaps between the wing and the point rail

justme igor

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I was building in prototypical p-32, however this is not going to fit the bill, sort of speak.
For the loco's i would like to have, with the room i have, it is simply not possible to go even near those dimensions.
Minimum radii is 3 meters, max i can do is 8 meter radii, but it will be 5 meter radii(oke will be six?)
There will be 3 loops in my garden layout, one loop is special for the bigger loco's!!!, those will go around the house and can only drive on the outsides of the garden.
Outer loop: AA20, big boy, challenger, red devil ect.
Inner loops all smaller but incl the flying Scotsman.
But the smaller ones will run also on the outer loop, this means turnouts crossings ect.
Some fiddle yards and for storage a trestle.

I read on a other topic that between the stock rail and the guard rail is a gap of 3 to even 4!!mm(brand dependent)
In between the stock rail and the points also?
And the gaps by the frog between the wing rail and the point rail is also 3 to 4 mm gap.
I was like: WHAAAT?

What would you suggest to keep as gap?
Mimic:
Prototypical: not to do when it comes to drive a loco(out of my league and out of what i can afford or want).
G1mra: to small for what i want.
Nmra standards: i can get away with it for my bigger loco's, but there will be probably trouble ahead.
Lgb or similar standards.
Or grandfathers "all around big gap" standards?
Combine nmra with lgb/similair gaps?
(thanks to Greg Elmassian Greg Elmassian for fine tuning on your site)

What would you suggest for my scale 1:32, according for the gap?
And any suggestions about the back to back flange would be welcome aswel.
I have been experimenting with back to back flange 42mm and with a flange thickness of 1 mm, this works perfect with one(1) boogie on a prototypical scale turnout(1:8-1:10), but now a 5 or a 6 wheeler non articulated frame loco.... let alone the AA20 a 7 wheeler?

As you already tasted, i overthink to much and regarding this topic/subject i am really swimming in the dark for the measurements, what to do???
For technical execution....oh man just wait, start to drool now and lick your fingers, you aint see nothing yet....

Any advice is and will be very appreciated.

With best regards Igor.
 
I'd ask a question first, with back to back of 42 mm and flange thickness of 1 mm, what wing rail flangeway width (the flangeways on both sides of frog) and what stock rail flangeway width (on the outer rails) did you use?

Something is not right in the measurements, the back to back in the "standard" NMRA is about 40 mm... you seem to have increased the gauge of the wheels, not reduced them.

Can you double check?

Relate to page 3:


Greg
 
What would you suggest for my scale 1:32, according for the gap?
And any suggestions about the back to back flange would be welcome aswel.
Igor, I don't know if you read the discussion on LSC about frogs:
Frog Help

As I commented there, it depends on how close to scale your wheels are and what the back-to-back measurements are.
 
I read that thread... ugh... no mention of standards, except an erroneous reference to 1.575" back to back being finescale.

That thread is also about an R1 switch with a #4 frog, about as far away from what Igor wants to do.

No offense, but I would not pimp that thread.

Igor, I do give recommendations on my page, there is a lot there, but there is no short answer since all dimensions work together, wheels and track.

Even though this is in my page, I would use the NMRA "standard" (not the finescale nor the toy) numbers. G1MRA is a little light in some of the flange dimensions in my opinion.

Even though you will have broad curves, the long wheelbase will make things more difficult as I know you appreciate.

Waiting for the updates to your back to back measurements/goals...

Greg
 
Fred2179G Fred2179G and Greg Elmassian Greg Elmassian i follow for replay or was it: replay to follow? what ever the proper fraze/saying is?, i am very busy atm sorry, all will be taking into consideration, hint tips and trick are always welcome.
The link will be read.
Yes Greg your site is a data goldmine!
Thanks in advance
With best regards Igor
 
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