curve conversion

[NW Modeling List]

R = K / D, where R is the model curve radius in inches, D is degrees of 
curvature, and K is a constant that is proportional to the scale of 
interest. In HO scale (1:87), K = 790. So for example in O scale (1:48), 
K = 790 * 87 / 48 = 1432.

Grant Carpenter
---
On 9/1/2014 7:26 AM, NW Mailing List wrote:
> Which, going back to the original question, would translate to about a 
> 38.5" radius in HO scale if I've done my math right.  An 18 degree 
> curve would be 43.85" radius.
>
> Ken Rickman
>
> Date:
> 8/31/2014 9:08 AM
>
>
> Quickly scanned, mind you, but the Abingdon
> Branch had many 18 degree curves, but the
> sharpest I found on the track chart was near
> Taylor's Valley near M.P. 23  -- 20 degrees
> 30 minutes.                   Harry Bundy
>
> Date:
> 8/30/2014 6:57 AM
>
>
> As I watch the N&W videos and see film taken from the combine as the 
> Va. Creeper went around tight curve after tight curve.  What was the 
> minimum radius on that branch?  What would that be in HO scale?    28"?
>
>
> Mark Lindsey
> Stuck in the 1930's
>

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