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7 mm/ft
B151
GWR 0-4-2T, 48xx, later 14xx driving wheel.

5′ 2″ diam., 16 oval spokes, rectangular inner rim, 5¾″ tyre width, 4¼″ apparent tread.
Hub 14″ face dia., 1⅜″ out from the tyre, pin between at 10″.
Tyre width for scale models: 4.56 mm.

Source: works drawings for the 1400 class, lots 279, 287 and 288.

Casting: 36.2 mm tread dia., 31.3 mm i/d., hub 0.8 mm out from the tyre, pin at 5.5 mm.

Casting prices and stock . GWR loco sets, price list

Scan of a casting in sets for GWR 0-6-0 22xx . 0-6-0PT 54xx . 0-4-2T 48/14xx.

Scan of casting B151

Cross section diagram of casting B151
This example shows a tyre width of 3.5 mm for Gauge 0 Fine.
For Scale7 remove more metal from the back of the wheel to give a tyre thickness of 3.2 mm instead of 3.5 mm.


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27 Mar 2013