Central VA - Railroad Research

    Study guide: Railroads - Trains
Trains, Model Railroads

 

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Typical model railroad scales are (largest to smallest)

            Link for CONVERSION TABLES

1:12 Large Scale
1:13.7 7/8 inch scale
1:20.3 G, Three-Foot Gauge on Gauge 1 Track
1:22.5 LGB and Bachman
1:24 Half scale
1:29 Aristo-Craft, USA Trains, standard gauge on #1 gauge
1:32 I scale
1:48 O scale
1:64 S scale
1:87.1 HO scale
1:120 TT scale
1:160 N scale
1:220 Z scale

Grades:
2% grade drawing

 

     Table: Grades
  Prototype             Vertical Rise for a Horizontal Run of        
    Grade 12"   24"   36"   48"   60"   72"   96"    
                                   
0.5   % 0.06 " 0.12 " 0.18 " 0.24 " 0.30 " 0.36 " 0.48 "  
1   % 0.12 " 0.24 " 0.36 " 0.48 " 0.60 " 0.72 " 0.96 "  
1.5   % 0.18 " 0.36 " 0.54 " 0.72 " 0.90 " 1.08 " 1.44 "  
2   % 0.24 " 0.48 " 0.72 " 0.96 " 1.20 " 1.44 " 1.92 "  
2.5   % 0.30 " 0.60 " 0.90 " 1.20 " 1.50 " 1.80 " 2.40 "  
3   % 0.36 " 0.72 " 1.08 " 1.44 " 1.80 " 2.16 " 2.88 "  
3.5   % 0.42 " 0.84 " 1.26 " 1.68 " 2.10 " 2.52 " 3.36 "  
4   % 0.48 " 0.96 " 1.44 " 1.92 " 2.40 " 2.88 " 3.84 "  
4.5   % 0.54 " 1.08 " 1.62 " 2.16 " 2.70 " 3.24 " 4.32 "  
5   % 0.60 " 1.20 " 1.80 " 2.40 " 3.00 " 3.60 " 4.80 "  
Note:  Example shown below is for the RED entry above.            

 

    Table:  Scale Speeds
 Prototype           Scale Speed        
   Speed            (inches/sec)        
(miles/hour) Z   N   TT   HO   S   O   G
                               
1     0.08   0.11   0.15   0.20   0.28   0.37   0.78
2     0.16   0.22   0.29   0.40   0.55   0.73   1.56
5     0.40   0.55   0.73   1.01   1.38   1.83   3.91
10     0.80   1.10   1.47   2.02   2.75   3.67   7.82
15     1.20   1.65   2.20   3.03   4.13   5.50   11.7
20     1.60   2.20   2.93   4.04   5.50   7.33   15.6
25     2.00   2.75   3.67   5.05   6.88   9.17   19.6
30     2.40   3.30   4.40   6.06   8.25   11.0   23.5
35     2.80   3.85   5.13   7.07   9.63   12.8   27.4
40     3.20   4.40   5.87   8.08   11.0   14.7   31.3
45     3.60   4.95   6.60   9.09   12.4   16.5   35.2
50     4.00   5.50   7.33   10.1   13.8   18.3   39.1
55     4.40   6.05   8.07   11.1   15.1   20.2   43.0
60     4.80   6.60   8.80   12.1   16.5   22.0   46.9
70     5.60   7.70   10.3   14.1   19.3   25.7   54.8
80     6.40   8.80   11.7   16.2   22.0   29.3   62.6
90     7.20   9.90   13.2   18.2   24.8   33.0   70.4
100     8.00   11.0   14.7   20.2   27.5   36.7   78.2
110     8.80   12.1   16.1   22.2   30.3   40.3   86.0
120     9.60   13.2   17.6   24.2   33.0   44.0   93.9
150     12.0   16.5   22.0   30.3   41.3   55.0   117.3

 

 

 

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