04-18-2009, 07:29 AM
At the risk of sounding trite, I will state the NMRA RP-20.1 Car Weight figures here. The RP is a Recommended Practice and does NOT carry the same responsibilities as a Standard. Now, that said, it is a very goo recommendation for good operation.
Quote:
Carefully documented tests, show a decided advantage in performance past obstructions in the track for cars weighted to an optimum weight. Since the radial forces tending to cause derailments are greater in longer cars, this optimum weight will vary with car length.
Unquote:
SCALE INITIAL WEIGHT + ADDITIONAL WEIGHT per inch of car body length
This means that:
HO = 1 ounce + 1/2 ounces per inch of car.
In other words a 6 inch car should weigh about 4 ounces.
That's all folks. :-)
Quote:
Carefully documented tests, show a decided advantage in performance past obstructions in the track for cars weighted to an optimum weight. Since the radial forces tending to cause derailments are greater in longer cars, this optimum weight will vary with car length.
Unquote:
SCALE INITIAL WEIGHT + ADDITIONAL WEIGHT per inch of car body length
This means that:
HO = 1 ounce + 1/2 ounces per inch of car.
In other words a 6 inch car should weigh about 4 ounces.
That's all folks. :-)
Roger Hensley
http://madisonrails.railfan.net
http://madisonrails.railfan.net