Is anyone running 'oversize' vehicles in Gauge 3? By that I mean outside the recommended limits given on the G3S website of 205mm high by 140 wide. I'm about to commit tunnel portals to masonry, and I'm particularly interested to hear back from anyone who might like
(https://i.ibb.co/410r9b9/4693950-C-4451-4-E3-C-BC99-4-BB27-EF04-EE8.png) (https://ibb.co/410r9b9)
to run on Apple Tree Railway, on the Notts/Derby border.
The screenshot below is my interpretation of the vehicle cross-section, ie the roof and chassis profiles added.
Many thanks,
Tim
Tim,
So far as I know all my stock is "to scale" (1:22.6 ish).
At Alan's Ampthill meet a few years back, a loco got wedged in his tunnel!
I believe it was one of the Indian Railways type diesel locos as supplied by Pline models of Calcutta but I don't remember who brought it to the event.
Someone else may be able to add more details.
John.
YES.
Four of my locomotives are fitted with OL diamond pantegraphs. Physically all the locomotives are built to the Berne Loading Gauge with the exception of Maude - who is US/Can.
The 2-Nol sets could give problems as they are 92cm long and have by far the longest pivot to pivot distance. The Krokodil will however go through swimmingly...
Regards
Ralph
Quote from: cabbage on May 10 2020 23:10
YES.
Four of my locomotives are fitted with OL diamond pantegraphs. Physically all the locomotives are built to the Berne Loading Gauge with the exception of Maude - who is US/Can.
Regards
Ralph
Would you care to measure them up Ralph? Preferably with pantos powered; there being no overhead power on ATR!
That should have read " lowered" 😩
Ralph, if the 'Krok' didn't fit, it could have snapped...., and yes I remember a trapped bogie electric at Alan's, why didn't I video it?
Ian the Gauge '3' Pirate
Most wagon and carriage stock will be within loading gauge Tim - because it does tend to be built pretty much to scale (or very near it) or if vintage stock, it's to 1/2" scale, so smaller anyway.
But quite a few older steam locos may be over sized, especially engines based on LBSC designs, which are generally only semi-scale at best. I seem to remember a LBSC loco's chimney skimming a neat 'shim' out of the bridge at Tenterden a few years back. Surprisingly, the loco wasn't badly damaged - just some paint scratched off I think.
Of course, N2.5G Association don't think too much about track clearances because they don't have tunnels or platforms to worry about and generally just want a powerful loco. So even apart from their N/G stuff, some newer standard gauge 2.5" designs are also over-large. Dick Allan's Baddesley 0-4-0/0-4-0 Garrett comes to mind (although Dick didn't design it himself) it was built around Tich cylinders and is rather wide.
So the problem is probably mainly with some older steam locos (but also one or two newer ones) and for tunnels probably mainly height issues. Platforms are obviously also an issue with wide stock. Track geometry also plays a part - we use non-prototypical curves. However, most new "Gauge 3" products shouldn't be a problem for you in practice I'd think. But if you can build in some margin without spoiling the look, it might be a sensible precaution.
Regards,
IanT
Tim,
I think you are going to have to abandon your super exact outlook. Simply add 5cm to the dimensions, up,left and right. This will avoid "The Clowne Tunnel" effect. The inside of which is decorated with the paint scraping of locos and carriages...
Regards
Ralph
I well remember the embarrassing time at Alan's when my hideous Indian B0 B0 No. 107 attempted to ream the inside of the tunnel. This loco is well over gauge and is now only used at home for track maintenance and failed loco retrieval. Even this use will be redundant when the first of my SR C0 C0's is commissioned. The only good parts of 107 are the power bogies which were totally remade by Garry, when the ones supplied were found to be totally useless. I hope to be able to reuse these eventually.
Robert. 492.
Morning chaps.
Whilst I'm content that my tunnels will accommodate British outline stock, if made at or near scale, I'm still a bit curious about the logic behind the very large cross-section promoted by the G3S website in the technical standards section. It's a good foot and a half wider and three feet taller than British stock. My post was to explore any take up of these sizes, and whether anyone was likely to travel to the Midlands to bring their stock to my Railway. I take your point about semi-scale early steam locos Ian, and I'm wondering if the size limit was aimed at this faction. Nevertheless, it's going to be a case of 'let the driver beware', and 'don't raise your pantographs'.
My margin is to design the loading gauge to the recommended maximum stock size on the website. Although my background is nuclear engineering, with all of its layers of conservatism, I just don't have the widths available to me in the herbaceous borders!
I still don't know the sizes of your Berne or US/Canada models Ralph, so to be clear on my message, please assess your actual models if you want them to go through the hole!
I think I'll go ahead in the absence of specific pleas from potential visitors.
Just seen Robert's post about the Indian 107 Bo-Bo; how big was that!!?
Regards, Tim
Tim,
Maude is 15.3 x 22cm = US/CAN
Rosebud is 13.7 x 21cm = Berne
Add 4cm height for folded panto.
Maude has proven she can get around the part of the track near the chickens if you remember.
Regards
Ralph
Quote from: cabbage on May 10 2020 23:10Physically all the locomotives are built to the Berne Loading Gauge with the exception of Maude - who is US/Can.
Yes please!
One option is to represent one of the very many tunnel mouths which are nowhere near the loading gauge.
https://www.alamy.com/stock-photo-south-bound-virgin-pendelino-express-train-exits-kilsby-tunnel-near-30943645.html
https://www.higgypop.com/news/lifting-the-lid-on-box-hill/
I don't think ever Ralph's model would hit the roof of Box Hill?
Mike
Thanks for inputs here. As always there are space limitations, and I think the sensible compromise here is to try and allow for the Berne loading gauge, but US/Can will definitely be a bridge too far.
Thank you, Tim