Dual-Gauge Track: 45mm and 16.5mm

Not what you were thinking of, but in the spirit of 'a prototype for everything '...
 
Rhino, Is this what you're talking about? Imgur Video
Oh no, that's another one :D:D now we've really started something :rofl::rofl:

The one in my muddled head was actually a temporary arrangement, but I can't help thinking that the sugar can example may be a 1:1 example of what we're talking about.

Apparently, railway wheel profiles differ for the proposed speed of the trains involved and, as we know, faster trains use wider radius curves with finer wheel profiles, but I suspect the problem is the same, that the smaller wheels of the sugar cane trucks would struggle to get across the gap :nod::nod:
 
The most reliable way would be to have some form of swingnose or movable frog. But it would, of course, require additional engineering.
MPF_resized_jpg_571016024.jpg_1722615093.jpgsimple-turnout.jpgswingnose-railway-crossing-moveable-point-frog-MJ1YN5.jpg

Rik
 
Oh no, that's another one :D:D now we've really started something :rofl::rofl:

The one in my muddled head was actually a temporary arrangement, but I can't help thinking that the sugar can example may be a 1:1 example of what we're talking about.

Apparently, railway wheel profiles differ for the proposed speed of the trains involved and, as we know, faster trains use wider radius curves with finer wheel profiles, but I suspect the problem is the same, that the smaller wheels of the sugar cane trucks would struggle to get across the gap :nod::nod:
I like this video, which Patrick also shared. I appreciate the concept of modeling something that actually exists. So, I may do both; the "bridge" and my base design (see post #16) because I also really like the idea of the smaller trains running within the track of the larger. It'd make for a cool photo: my LGB Forney behind my HO GP38-2.
I shall add some track to my shopping list... and maybe a Dremel (though, I thought I had one...)
 
Has anyone tried this sort of thing? I just did a quick SketchUp drawing for what I'm thinking. Ultimately, I want to the LHRR to have its 'full size' engines (running on 45mm track) and its own 1/4 scale engines (my HO stock running on 16.5mm track). My biggest problem I'm coming up with so far is that the flangeway for the 45mm through the HO rails would be way to big for HO trains to be able to safely cross the gap.

Below: my drawing with the flangeway gap (5mm gap) which results in a rail gap of about 25mm for the HO trains to (attemp to) cross. View attachment 338765

Below: No gap for the 45mm track, just to show my drawing.
View attachment 338766

Any thoughts, suggestions are appreciated! Thanks!
Perhaps treat the crossings like a set of points and have the 16.5mm rails capable of being moved away from the 45mm and then closed when a 16.5mm Train traverses
 
I shall add some track to my shopping list... and maybe a Dremel (though, I thought I had one...)
You do have one, but you put it away in a safe place that you would easily remember ...
Don't ask :p

I seem to remember photos from a yard shared by the Penrhyn and the LNWR where the NG crossed the standard gauge with (re)movable rails laid atop the standard gauge rails, but I cannot for the life of me remember where I saw them o_O
Not very helpful :oops:
 
Like has been mentioned above by Flying15, A way of moving the 16.5mm rails away from the 45mm rail when the g scale is being run might be the best way. Here is the idea with 5 inch and 2 foot gauge track in Japan. The only issue would be preventing the 16.5 from shorting over the 45mm gauge. maybe an insulated joiner between where the 16.5 rails cross over?Screenshot 2025-02-13 at 16.14.16.pngScreenshot 2025-02-13 at 16.14.06.png
 
Like has been mentioned above by Flying15, A way of moving the 16.5mm rails away from the 45mm rail when the g scale is being run might be the best way. Here is the idea with 5 inch and 2 foot gauge track in Japan. The only issue would be preventing the 16.5 from shorting over the 45mm gauge. maybe an insulated joiner between where the 16.5 rails cross over?View attachment 338880View attachment 338881
I love real-world examples, Harry. Thank you for this!
 
Tiny Update: (So tiny, this text is smaller...)
I ordered some code 100 HO track from eBay the other day so once that's here, I'll start playing around with it. I really like Harry's photos above. They give not only a good concept, but also a good way to go about the ties.

Updates will be posted once I have them...
 
Hadn't considered that, Phil. Yes, my plan is to power the HO track. The 45mm won't be powered, but if it is metal it would short the line. Maybe I make a piece out of something else then. 3D printed piece, maybe? just to fit in that space when needed.
There is plastic rail made from the 45mm track. I bought several sticks to use on a MoW rail and tie car. I had metal rail cut for it, but it made the car weight ridiculous.
 
20250220_170055.jpg
Well, my new old HO track is here. I got started playing around. I feel like this may work.
I also cut a 5mm gap in a piece of track. It wont work with my rolling stock. The wheels will for sure get stuck. Probably cause derailments and such. Ill keep playing...
 
What you might like to try is removing the sleepers from the HO track to make it lower to avoid the wheel flanges of the G stock and carefully cut 2 slots out of the G rail to feed the HO track through. It'll take a lot of careful cutting though
 
What you might like to try is removing the sleepers from the HO track to make it lower to avoid the wheel flanges of the G stock and carefully cut 2 slots out of the G rail to feed the HO track through. It'll take a lot of careful cutting though
Sounds like a plan, but I fear if the HO railhead is low enough to clear the G flanges, there will not be enough clearance in the HO 'four-foot' where it exits from within the G track.

PhilP.
 
Back
Top