Is about 4oz the correct weight for a 40 ft box car? Many of my cars seem light.
Quote from: bill collins on April 22, 2014, 05:55:55 PM
Is about 4oz the correct weight for a 40 ft box car? Many of my cars seem light.
How to calculate. Everyone store the link in Favourites or Bookmarks.
http://www.nmra.org/beginner/weight.html
Rich
HO scale (1:87.1), 40 ft box car NMRA recommended car weight is 3.75 ounces
Click Here (http://nmra.org/standards/sandrp/rp-20_1.html) for NMRA recommended car weight info.
Math
Additional car weight = 2.75
40 x 12 = 480
480 x 0.5 = 240
240 / 87.1 = 2.75
Initial weight = 1
2.75 + 1 = 3.75
More info Click Here (http://www.nmra.org/beginner/weight.html)
Bill-
Four ounces is just fine. The NMRA recommendation for HO is one ounce plus a half-ounce for every inch of length. Since 40T box cars are right about six inches long, four ounces is the solution (1 + [6 X .5] = 1 + 3 = 4).
-- D
A HO scale 40' box car should be right at 5.5" not 6" long.
40 x 12 = 480
480 / 87.1 = 5.51 inches
However Bill, compute the weight your car should be per NMRA using the actual length of your model.