Trainline Curved Points - what LGB R numbers do they map to?

Ralphmp

Ralphmp

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Could some kind soul please confirm that the curvatures of the Trainline 120cm/210cm curved points are equivalent to LGB R3 / R5?

The Explore the World of LGB "handbook" states that R3 is 1198 mm when taken "centre to centre" - which as near as makes no difference is 120cm (assuming the Trainline measurements are also taken "centre to centre") - but the version of the document I have it doesn't list any similar data for R5.

Intuition indicates that 210cm should be the equivalent to R5 but having this confirmed before spending the thick end of £200 would be helpful.

Thanks in advance

Phil
 
LGB R3 is 1200, LGB R5 is 4640 (these are diameters)

210 cm / 2100 mm is between LGB R2 and LGB R3, not exactly any match.

You could use R2 and spread it out a bit and then transition back to R3, or you could tighten up an R3 to transition to more R3.

Here's the real dimensions on LGB track (there's a lot of wrong numbers out there, even on old LGB literature):

https://elmassian.com/index.php?option=com_content&view=article&id=328&Itemid=366

Greg
 
Yep, spazzed out, copied the R1, not the R3 diameter,

And his numbers are radii, for the TL switch, apparently.

I got thrown by R3 being stated as "center to center" when you cannot measure a radius center to center! Only on a diameter.

My link to my chart is correct. :)

Anyway, the TL switch has 1200 / 2100 which if RADIUS is R3 and a bit less than R5.

If the 1200 / 2100 is DIAMETER, then it is R1 and a bit less than R3.

Over here, all LGB people speak DIAMETER, but most of the switch people speak RADIUS.

From looking at a picture:

(from this forum) https://www.gscalecentral.net/threads/trainline-45-curved-point.301373/

Looks like it could be the R3 / ~R5 curvature..

Greg
 
I used one in my fiddle yard amongst R3 LGB Track, it fitted quite well but I could not comment on the actual geoetary. Another thing to watch out for, on mine there was a Reed Switch to swop the polarity of the frog. Worked very well but went belly up when loco caused a short so it has been replaced by a Micro Switch that is worked by the Point Operating Air Switch that I use.
 
Greg Elmassian said:
Yep, spazzed out, copied the R1, not the R3 diameter,

And his numbers are radii, for the TL switch, apparently.

I got thrown by R3 being stated as "center to center" when you cannot measure a radius center to center! Only on a diameter.

My link to my chart is correct. :)

Anyway, the TL switch has 1200 / 2100 which if RADIUS is R3 and a bit less than R5.

If the 1200 / 2100 is DIAMETER, then it is R1 and a bit less than R3.

Over here, all LGB people speak DIAMETER, but most of the switch people speak RADIUS.

From looking at a picture:

(from this forum) https://www.gscalecentral.net/threads/trainline-45-curved-point.301373/

Looks like it could be the R3 / ~R5 curvature..

Greg
Click to expand...

Sorry Greg - the handbook explains the measurements are from the centre of a circle of track to the centre - ie midpoint between the rails - of the track making up the circle. I should have quoted the whole text to avoid confusion.
 
dunnyrail said:
I used one in my fiddle yard amongst R3 LGB Track, it fitted quite well but I could not comment on the actual geoetary. Another thing to watch out for, on mine there was a Reed Switch to swop the polarity of the frog. Worked very well but went belly up when loco caused a short so it has been replaced by a Micro Switch that is worked by the Point Operating Air Switch that I use.
Click to expand...

Thanks Jon.

I remember you pointing (sorry!) it out to me when I visited you a while back, and I found/re-read some of your posts about the install when trying to nail down if the curved point would work for me.
 
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