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The Scale Rule (12" and 6")
All rules feature 12 or 6 inches of
primary scale and two rules of 6 or 3 inches each of secondary scales for easy up or down scaling
12 or 6 inches long and flexible!
Measure in scale a full 24 foot car ( in this scale) accurately down to one scale inch
For Example: the illustrated 1:22.5 Scale Rule includes 6 Inches of a 1:87.1 Scale Rule and 6 inches of 1:48 Scale Rule. Most scale drawings in magazines are in one of these scales. See how easily you can scale up 8 scale feet from a 1:87.1 scale drawing to 8 scale feet on your scale model
Scale Accuracy of Rules
1:12 to 1/2" -- 1:20.3 - 1:48 to 1" -- 1:64 and 1:96 to 2"
1:144 to 3" -- 1:192 to 4" and the 1:87.1/1:160 to 3"/6"
6" or 3" of Up/Down Scales
1:12 uses 1:24/1:48, 1:20.3 to 1:32 and 1:64 use 1:87.1/1:48
1:35 uses 1:76/1:48, 1:48 uses 1:87.1/1:72, 1:96 uses 1:192/1:144
1:192 uses 1:96/1:144, and the 1:87.1/1:160 uses 24" of each
 

 

Guaranteed Accurate to +/- 0.002"