Welcome to the forum   
Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

Share
Options
View
Go to last post in this topic Go to first unread post in this topic
Offline Toosmall  
#1 Posted : 30 July 2021 00:15:59(UTC)
Toosmall

Australia   
Joined: 26/07/2021(UTC)
Posts: 42
Location: New South Wales, Newcastle
The uphill battle!

To remove any issues with rail I silver soldered the joints to have continuous "welded" rail. This is handy for uphill spirals in mountains where access is a bit more difficult.

I used a medium temperature silver solder. You need a fine point torch to direct heat and silver solder flux. Once the joint is cleaned up with a needle file you wouldn't know the joint was there.

The most painful bit is feeding the sleepers back onto the rail, but it's not that bad.

I made up a tool to hold the rail in the exact position. This is the key to making the job easy. Both ends are actually butted up together (a bit apart just for the photo). If you have done a bit of silver soldering this is a piece of cake.

83289.jpg

83289crop.jpg

63007.jpg

63008.jpg
thanks 7 users liked this useful post by Toosmall
Offline DaleSchultz  
#2 Posted : 30 July 2021 03:44:33(UTC)
DaleSchultz

United States   
Joined: 10/02/2006(UTC)
Posts: 3,879
wow!
Dale
Intellibox + own software, K-Track
My current layout: https://cabin-layout.mixmox.com
Arrival and Departure signs: https://remotesign.mixmox.com
Offline kiwiAlan  
#3 Posted : 30 July 2021 15:34:23(UTC)
kiwiAlan

United Kingdom   
Joined: 23/07/2014(UTC)
Posts: 6,337
Location: ENGLAND, Didcot
I'll be interested to see what problems you have with temperature variations in the room.

I have observed problems with layouts on the exhibition circuit here in the UK where the layout will operate for hours - until taken to an exhibition and with all the people in the exhibition hall the temperature rises 5-10C above the usual and the rails go out of gauge or move resulting in derailment problems.

thanks 2 users liked this useful post by kiwiAlan
Offline Toosmall  
#4 Posted : 30 July 2021 22:01:08(UTC)
Toosmall

Australia   
Joined: 26/07/2021(UTC)
Posts: 42
Location: New South Wales, Newcastle
The thermal expansion coefficient at 13.5um of the nickel rail is less than the thermal coefficient of the base material so the rail actually shrinks in relation to the base as the temperature increases.

I had this sort of issue between aluminium and steel in the 1980s on a job than changed 50°C and caused a few issues until I factored the two different coefficients in.

On another job the various alloy elements changed enough between the standard minimum and maximum element tolerance to cause an issue. That was a challenge until I realised the small percentage of alloy elements were causing the problem and not the metal as a whole.

Also if you are using timber that changes size a fair bit depending on the level on humidity. We notice this with our timber floors. Currently cold weather and our typical dry winter weather causes gaps to appear between the floorboards.

With the rail I have never had an issue.
thanks 1 user liked this useful post by Toosmall
Offline parakiet  
#5 Posted : 01 August 2021 13:36:25(UTC)
parakiet

Belgium   
Joined: 20/02/2017(UTC)
Posts: 98
Location: Flanders!
just add more feeding connections?!?
Offline parakiet  
#6 Posted : 01 August 2021 13:38:09(UTC)
parakiet

Belgium   
Joined: 20/02/2017(UTC)
Posts: 98
Location: Flanders!
or is it to reduce bumps?
Offline Toosmall  
#7 Posted : 01 August 2021 14:04:16(UTC)
Toosmall

Australia   
Joined: 26/07/2021(UTC)
Posts: 42
Location: New South Wales, Newcastle
It is the speed bumps. Some carriages are ok, some aren't, remove the problem.

I have regular electrical connections as nickel has 4 times the resistance of copper.
thanks 1 user liked this useful post by Toosmall
Users browsing this topic
OceanSpiders 2.0
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

| Powered by YAF.NET | YAF.NET © 2003-2021, Yet Another Forum.NET
This page was generated in 0.399 seconds.