curve conversion
NW Modeling List
nw-modeling-list at nwhs.org
Tue Sep 2 20:49:20 EDT 2014
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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