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4-SF when to switch between 2 rail track gauge and 3 point ones





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#1 MikeH_83

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Posted 20 February 2018 - 08:28

Hi all,

 

I am currently making my track to 4-SF (00-SF) and I am wondering at what radius curves I should change from using the normal 2 rail track gauges to the 3 point ones?  Also if I remember correctly with the 3 point gauges you haveto use the 2 side part on the inside of a curve?

 

Cheers





#2 Siberian Snooper

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Posted 20 February 2018 - 09:10

The two prongs go on the outside of the curve, otherwise you end up with gauge narrowing. I tend to use them on all curves, on the shallower ones it won't make much difference and for long sections of plain track I revert to 16.5 ready to lay track.



#3 Izzy

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Posted 20 February 2018 - 09:23

You can really use 3-point gauges with any track, from dead straight to, well, as tight as you need/want. The key is that the amount of gauge widening is roughly proportional to the tightness of the curvature. This presumes the gauge uses the standard size design with the distance between the two legs being twice the track gauge. As has just been posted, the two legs go on the outside rail, otherwise the opposite effect of gauge narrowing occurs.

 

regards

 

Izzy



#4 MikeH_83

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Posted 20 February 2018 - 11:11

Thanks both!  Didn't want to make lots of track and then find out I made alot of mistakes lol



#5 Junctionmad

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Posted 20 February 2018 - 11:31

Hi all,

 

I am currently making my track to 4-SF (00-SF) and I am wondering at what radius curves I should change from using the normal 2 rail track gauges to the 3 point ones?  Also if I remember correctly with the 3 point gauges you haveto use the 2 side part on the inside of a curve?

 

Cheers

 

IN general with 00-SF plain track , you don need any gauge widening down to 3' radius curves , below that and you will need to increase the gauge 



#6 MikeH_83

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Posted 20 February 2018 - 11:50

IN general with 00-SF plain track , you don need any gauge widening down to 3' radius curves , below that and you will need to increase the gauge 

 

Ah that's not so bad then at 3' is the minimum I have my layout set at.  Most curves are above that at almost 6'  Cheers