Aristo radius 6 switches

[kstrong]

To be precise the frog angle at point of intersect is

21.919º for the R1 (600mm)

11.231º for the R3 (1175mm)

11.206º for the R5 (2320mm) 

 

ER 

 

You sure about that frog angle for the wide radius (R5) switch? There's no way it can be more than twice the radius, but still have the same frog angle as the R3 switch.

Later,

K

[Anonymous]

To be precise the frog angle at point of intersect is

 

21.919º for the R1 (600mm)

11.231º for the R3 (1175mm)

11.206º for the R5 (2320mm) 

 

ER 

 

You sure about that frog angle for the wide radius (R5) switch? There's no way it can be more than twice the radius, but still have the same frog angle as the R3 switch.

Later,

K

 

K

 

Our techie goofed on the subtractions :

 

R1 = 21.919º 

R3 = 15.757º

R5 = 11.249º

 

He really should have caught that!

 

ER 

[Capt Bob Johnson]

All of which brings us back to my original caution.  The LGB switches are made to replace a section of curve in a circle; the Aristo are divergent, thus cannot be used as a direct replacement for curved track!

With that caveat in mind, go for that which floats your boat!

[Anonymous]

Aye, Capt'n Bob, a Number 6 switch definitely can't directly replace a piece of sectional track, but if you want to complete a 90 degree curve with sectional track, it is quite useful to know how much to cut off a section so that things come out right.  Now if the sectional track being used was the type where 20 made a circle, each section would be 18 degrees long and a half section would 'stretch out' the Number 6 to make 18 degrees. And if the sections were 15 degrees long, then a third of a section would work nicely.  Of course straight sections or whatever would have to be added to make a loop but that's a nit in the great outside

E.R., thanks for the update.  I figured it was a cut and dry mathematical exercise. Using 45mm for the gauge and 622.5mm for the outside radius, I come up with the same figure. 

But empirical data is useful; I did make a mistake in using 45mm for the gauge, though; my mike shows the switch I measured to have a gauge of 45.2mm.  That makes the outside radius 622.6mm, mathematically yielding an angle of 21.97 degrees with the frog to be located at 233mm from the start of the switch.  Since the measured distance was greater, 239mm, the angle also has to be greater.  I thought I was giving LGB the benefit of the doubt because of the points being placed behind the start of the switch but I doubt that that would affect things very much.

I had a math instructor once that insisted the number of significant digits in an answer could be no greater than the smallest number of significant digits in any factor involved in the final answer.  So, I'll happily settle for an R1 switch having a frog angle of 22 degrees.

Art

[dwbeckett]

  See the latest post on posting pictures and you too can master posting pictures

[tlnibert]

Does anyone else make a switch the size of the Aristo Craft #6.  I have 8 on my layout, that's never had a car over them. I'm redoing my layout and I need a swich that a train can shove the switch open.

Tom