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Re: Why & How RR curves are measured in degrees
Author: ES
Date: 02-11-2014 - 17:41

Dr Zarkoff Wrote:
-------------------------------------------------------
> Don't have any data for an SD9, but for SD40-2s
> and SD45-2s:
>
> Minimum curves:
> uncoupled: 30 degrees (193 ft radius)
> coupled to another unit: 22 degrees (262 ft
> radius)
> coup[led to a 50 foot boxcar: 16 degrees (359 ft
> radius)
>
> For an SD70MAC These are:
> uncoupled: 26.9 degrees (213 ft rad)
> coupled to another SD-70MAC: 22.4 deg (256 ft
> rad)
> coupled to an 85 foot psgr car: 20 deg (280 ft
> rad)
> coupled to a 50 ft box car: 15.4 deg (373 ft rad)
>
> Sources: their respective EMD operating manuals. I
> suspect the figures for an SD9 are almost the same
> as those for the SD40-2.

From the SD9 Operating Manual: Minimum Curve Radius 250 ft (August 1954)

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Subject Written By Date/Time (PST)
  Minimum practical radius for 6 axle locomotive? BN Oly 02-10-2014 - 18:40
  Re: Minimum practical radius for 6 axle locomotive? Flash 02-10-2014 - 18:53
  Re: Minimum practical radius for 6 axle locomotive? SP5103 02-10-2014 - 21:14
  Why & How RR curves are measured in degrees WebDigger 02-10-2014 - 22:02
  Re: Why & How RR curves are measured in degrees Dr Zarkoff 02-11-2014 - 08:47
  Re: Why & How RR curves are measured in degrees mook 02-11-2014 - 10:31
  Re: Why & How RR curves are measured in degrees M. Harris 02-11-2014 - 15:48
  Re: Why & How RR curves are measured in degrees ES 02-11-2014 - 17:41


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