## 27169Re: [OSCALEMODELERS] NMRA Weights

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• Jan 21 2:16 PM
On our club in Webster Groves, MO, we recommend reducing the weight by about 1.5 to 2 oz. with metal wheels (O-scale).  We have a couple areas with 3.3 % grade and have found that using a little less weight and metal wheels, we get satisfactory operation and able to pull more cars.

Ken R
Des Peres, MO

From: Charlie - Norwood Light <czephyr@...>
To: OSCALEMODELERS@yahoogroups.com
Sent: Tuesday, January 21, 2014 3:02 PM
Subject: RE: [OSCALEMODELERS] NMRA Weights

The NMRA weights are a piece of cake if the layout has no grades.  If you have 2% grades things get interesting with 12 to 15 car trains.  If you have 3% to 5% grades things get very interesting quickly.  This is based on personal experience.

Charlie Pitts
O Scale Trolley and Railroad Modeler
<czephyr@...>
Norwood, MA

From: OSCALEMODELERS@yahoogroups.com [mailto:OSCALEMODELERS@yahoogroups.com] On Behalf Of Gregg
Sent: Tuesday, January 21, 2014 10:46 AM
To: OSCALEMODELERS@yahoogroups.com
Subject: Re: [OSCALEMODELERS] NMRA Weights

This should help. From the NMRA Website:

http://nmra.org/standards/sandrp/rp-20_1.html

To find the optimum weight of a given car enter the Table below in the desired scale and find the "Initial Weight". Then find the "Additional Weight" and multiply this by the number of actual inches in the length of the particular car body. Add this weight to the "Initial Weight" for the total Optimum Weight of the car.
 SCALE INITIAL WEIGHT(ounces) + ADDITIONAL WEIGHTper inch of car body length(Ounces) O 5 + 1 0n3 1-1/2 + 3/4 S 2 + 1/2 Sn3 1 + 1/2 HO 1 + 1/2 HOn3 3/4 + 3/8 TT 3/4 + 3/8 N 1/2 + .15

From: "gldoran@..." <gldoran@...>
To: OSCALEMODELERS@yahoogroups.com
Sent: Tuesday, January 21, 2014 10:32 AM
Subject: [OSCALEMODELERS] NMRA Weights

I am starting to build some cars again and I lost my sheet with the NMRA correct weight for cars both in O and HO scale.  Can some one help me out??  Thanks

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