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5,334 Posts

Or the higher the number the tighter the curve of the switch?

Any one got a chart to covert numbers to diamaters?

When it comes to Scale I have burned into my brain THE SMALLER THE NUMBER THE LARGER THE OBJECT.

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Joined

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5,334 Posts

Or the higher the number the tighter the curve of the switch?

Any one got a chart to covert numbers to diamaters?

When it comes to Scale I have burned into my brain THE SMALLER THE NUMBER THE LARGER THE OBJECT.

Joined

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100 Posts

Hope this helps.

Garry NCGRR

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2,032 Posts

Whats the radius on a number 6 and on a number 4?

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350 Posts

Radius switches diverge from the straight through track on a curve that has a radius (i.e. Aristo Wide Radius switch is a 10' diameter - 5' radius curve.)

Numbered switches diverge from the switch at an angle. The number of the switch is the ratio of the number of units the diverging track goes forward for a one unit distance from the through track. In other words a number 4 switch would have a diverging track that separated from the through track by 1 inch for every four inches of length on the diverging track. On a number 8 switch, the diverging track would be 8 inches long before it had diverged 1 inch.

"T"

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3,315 Posts

Numbered switches diverge from the switch at an angle. The number of the switch is the ratio of the number of units the diverging track goes forward for a one unit distance from the through track. In other words a number 4 switch would have a diverging track that separated from the through track by 1 inch for every four inches of length on the diverging track. On a number 8 switch, the diverging track would be 8 inches long before it had diverged 1 inch.

Finally, an explanation of the numbers that makes sense. Thanks.

To belabor the point, a Number 1 switch forms an equilateral triangle, all sides the same length with a frog angle of 60 degrees. But if you measure out 1 distance and then measure straight up the same distance, that will form a 45 degree right triangle; the frog will be 45 degrees and would be a Number 1.4 switch.

Art

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350 Posts

For practical purposes though, in switch numbers which are normally used, the right triangle is close enough in approximation to the isosceles.

Art

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