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Below is listed some useful information regarding the laying of curved track using a straight edge and offset, and a table of minimum track radius for a given locomotive wheelbase.


Track Offset Diagram

Curve Radius Offset Dimension
70ft 1.75"
65ft 1.875"
60ft 2.0"
55ft 2.187"
50ft 2.437"
45ft 2.75"
40ft 3.062"
35ft 3.5"
30ft 4.062"
25ft 5.0"
20ft 6.187"



Wheelbase Diagram

 

5"G Locomotive (assumes 4.875" across flanges)

Curve Radius
Wheelbase A
Wheelbase B
45ft
11"
22"
40ft
10.5"
21"
30ft
9,5"
19"
25ft
8.625"
17.25"
20ft
7.75"
15.5"
15ft
6.75"
13.5"
7.25"G Locomotive (assumes TBD" across flanges)

Curve Radius
Wheelbase A
Wheelbase B
45ft
TBD
TBD
40ft
TBD
TBD
30ft
TBD
TBD
25ft
TBD
TBD
20ft
TBD
TBD
15ft
TBD
TBD

 

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