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Re: Why & How RR curves are measured in degrees
Author: Dr Zarkoff
Date: 02-11-2014 - 08:47

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.

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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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