NMRA recommended N car weight:
1/2 oz. plus .15 oz. per inch of car body length.

N-Scale Feet  1:1 Inches  Recommended Car Weight in Ounces
30  2 1/4 0.84
40  3 0.95
50 3 3/4 1.06
60 4 1/2 1.18
70 5 1/4 1.29
80 6 1.40

 

SP Route Segment ►

Roseville to Colfax
Track #2
Colfax to Sparks
Track #2
Sparks to Truckee
 Track #1
Truckee to Summit
Track #1
 ▼ Locomotive Type ▼ Tons  40ft. 35T Cars Tons  40ft. 35T Cars Tons  40ft. 35T Cars Tons  40ft. 35T Cars
PA - AB pair
2750 79 1650 47 4075 116 2150 61
F3 ABBA sets 4425 126 3100 89 6400 183 2150 61
Single F7 1225 35 675 19 1800 51 900 26
F7 ABBA sets 5500 157 3175 91        
                 
F-3-5 (2-10-2) 1375 39 975 28 2150 61 1800 51
AC 4-5 2225 64 1400 40 3400 97 1775 51
AC 6-12 2400 69 1450 41 3650 104 1850 53
AS616 1450 41 900 26 2150 61 1125 32