| Car length |
NMRA |
Urban Eagle |
BMS |
| 33 |
0.87125 |
0.75 |
0.7425 |
| 40 |
0.95 |
0.81 |
0.9 |
| 50 |
1.0625 |
0.90 |
1.125 |
| 57 |
1.14125 |
0.96 |
1.2825 |
| 70 |
1.2875 |
1.08 |
1.575 |
| 79 |
1.38875 |
1.16 |
1.7775 |
| 80 |
1.4 |
1.17 |
1.8 |
| 86 |
1.4675 |
1.22 |
1.935 |
The above chart shows 3 different ways of calculating weights. All three use the prototype length. The first is the NMRA formula, the second is by an individual and the third is the Belmont Shores Club. The difference at 40 feet is almost negligible, but become more significant as the length of the car increases.
