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Old 13-07-2018, 11:58 AM   #31
cadman
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You may find it worth checking the back to back wheel measurements especially on 3 axle steam locos. The centre axle of the drivers would benefit from being slightly less b2b than the usual 14.5mm to ease the transition around the tighter curves. ...HB
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Old 13-07-2018, 07:53 PM   #32
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Quote:
Originally Posted by cadman View Post
You may find it worth checking the back to back wheel measurements especially on 3 axle steam locos. The centre axle of the drivers would benefit from being slightly less b2b than the usual 14.5mm to ease the transition around the tighter curves. ...HB
I have no clue how to check the back to back or what it really is, I've seen it used a lot on forums but not known what it is or how it affects loco performance.
Still seems strange it would only be on this single spot of track.
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Old 17-07-2018, 11:21 AM   #33
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back to back is the internal distance between the inside wheel faces, it tends to cause issues by either binding noticeable on curves, as the loco goes round the curve it pushes the first axle to the inside the middle to the outside and the last inside again so if the any of the wheels are too wide then it binds. however if they are too narrow then they have a habit of catching on points as the check rails get in the way leading to derailment.

to check, its as simple as measuring between the back of the flanges. easiest done with an engineers calliper or a steel rule as these can be placed against the back of the wheel.

The track looks good
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Old 17-07-2018, 02:31 PM   #34
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OO scale B2B wheel gauges are sold by good model railway shops or can be obtained on line. One supplier is The Double O Gauge Association (DOGA) Link to DOGA sales You would need their Intermediate Standard gauge.
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Old 17-07-2018, 03:04 PM   #35
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It turns out WTD was right, way tighter than 3rd and possibly tighter than 2nd so no wonder it didn't like it.
Track has been lifted and relay will be started tomorrow.
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Old 17-07-2018, 03:11 PM   #36
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Quote:
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OO scale B2B wheel gauges are sold by good model railway shops or can be obtained on line. One supplier is The Double O Gauge Association (DOGA) Link to DOGA sales You would need their Intermediate Standard gauge.
and when its N gauge?
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Old 17-07-2018, 03:36 PM   #37
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Why not use some pieces of set track.
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Old 17-07-2018, 04:27 PM   #38
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Quote:
Originally Posted by chris_db4 View Post
and when its N gauge?
Try the 2mm scale Association or N gauge society?
But DCC Concepts produce one... Link to N gauge B2B gauge Or... Link 2
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Old 19-07-2018, 11:44 AM   #39
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Small update.

re-layed the track on one end of my outer loop yesterday, after leaving the copydex to go off completely overnight I am delighted to say that my loco goes round the curves without any issue at all.
On a side note I have got myself a nice little bargain loco from a facebook trading group, a class 25 'Rat' in BR green for 30.
Its the older tooling but i've got no thoughts about it being an issue with my layout.

Small hitch on laying the inner loop, the curved point I need is out of stock currently in both local model shops and one wont get it back in until monday or tuesday, I could order online but it costs more with postage.
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Old 19-07-2018, 01:11 PM   #40
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Quote:
Originally Posted by oncomin5torm View Post
Small update.

re-layed the track on one end of my outer loop yesterday, after leaving the copydex to go off completely overnight I am delighted to say that my loco goes round the curves without any issue at all.
On a side note I have got myself a nice little bargain loco from a facebook trading group, a class 25 'Rat' in BR green for 30.
Its the older tooling but i've got no thoughts about it being an issue with my layout.

Small hitch on laying the inner loop, the curved point I need is out of stock currently in both local model shops and one wont get it back in until monday or tuesday, I could order online but it costs more with postage.
Next day delivery and a good price, free postage on loco's and over 100 ordereds,,,,

https://www.track-shack.com/acatalog...co-SL-E86.html
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