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Offline CanadianKid  
#1 Posted : 10 February 2017 04:04:56(UTC)
CanadianKid

Canada   
Joined: 26/08/2016(UTC)
Posts: 126
Location: British Columbia
Hello,
Does anyone know what pro typical requirements would be for clearance heights for locomotives? This is just for a bridge, and I'm not installing catenary. I would like it to be as low as possible, to decrease the height of my slope, but also, I would still like it to be high enough for larger locos.
Thanks,
Matthew

Edited by user 10 February 2017 15:06:30(UTC)  | Reason: Not specified

Offline mike c  
#2 Posted : 10 February 2017 04:27:38(UTC)
mike c

Canada   
Joined: 28/11/2007(UTC)
Posts: 7,880
Location: Montreal, QC
It would depend on whether you will be operating steam and diesel locomotives or whether you will be operating electric locomotives (even without catenary). Setting up a bridge with a low clearance beneath it could cause derailment and damage to an electric locomotive if there is not enough room to pass with the catenary raised. Some pantographs raised are actually higher than the catenary masts themselves. I remember that some of the older catalogues and track manuals gave the precise clearance requirements for each locomotive type. I can try to see if I can locate one to provide the exact information.

I would think that Maerklin's bridge components would also include this information in the instructions, as would similar models from Faller, Kibri, etc.

One suggestion if, say, you are working on a figure 8 where one track passes underneath the other is to have one track climb while the other one dips, making the grade for the trains a little less.

Regards

Mike C
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Offline Br502362  
#3 Posted : 10 February 2017 07:19:55(UTC)
Br502362

Finland   
Joined: 05/03/2014(UTC)
Posts: 680
Location: Finland
Hi,

Maybe this helps you?

From top...

M-track with steam and diesel locos min. clearance 74,5mm
M-track with catenary min clearance 104,5mm
K-track with steam and diesel locos min. clearance 68,35mm
K-track with catenary min clearance 98,5mm

Clearance.JPG

Cheers

Åke
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Offline analogmike  
#4 Posted : 10 February 2017 13:05:25(UTC)
analogmike

United States   
Joined: 02/08/2014(UTC)
Posts: 737
Location: NEW JERSEY, USA
2 1/2 inches from the rail up. This will clear the stack on a Br 01. But you must run pantographs down on your E-loks.


Mikey
I love the smell of smoke fluid in the morning .
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Offline CanadianKid  
#5 Posted : 10 February 2017 15:05:28(UTC)
CanadianKid

Canada   
Joined: 26/08/2016(UTC)
Posts: 126
Location: British Columbia
Thank you for the help, I don't plan on running electric locomotives but that is good to be aware of.
Thanks,
Matthew
Offline Michael4  
#6 Posted : 13 February 2017 16:38:59(UTC)
Michael4

United Kingdom   
Joined: 02/02/2017(UTC)
Posts: 637
Location: England, South Coast
I'm planning a small M track layout at the moment, I wonder if anyone could give advice about gradients. I accept that steep track doesn't look that great but roughly how many standard track lengths (180mm) should I be allowing to achieve either a steam loco or pantograph clearance?
Offline Br502362  
#7 Posted : 13 February 2017 17:29:47(UTC)
Br502362

Finland   
Joined: 05/03/2014(UTC)
Posts: 680
Location: Finland
Originally Posted by: Michael4 Go to Quoted Post
I'm planning a small M track layout at the moment, I wonder if anyone could give advice about gradients. I accept that steep track doesn't look that great but roughly how many standard track lengths (180mm) should I be allowing to achieve either a steam loco or pantograph clearance?


Hi,

Here are M track gradients.

I is for diesel and steam locos and II is for pantograph locos.

Gradients.JPG

Best regards

Åke
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Offline Michael4  
#8 Posted : 14 February 2017 10:41:45(UTC)
Michael4

United Kingdom   
Joined: 02/02/2017(UTC)
Posts: 637
Location: England, South Coast
Many thanks Ake!
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