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7 mm/ft
B149
GWR carrying wheel.

3′ 8″ diam., 10 oval spokes, rectangular inner rim. Tyre width 5¾″.
Hub 11″ face diam., ¾″ out from the tyre.

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

Casting: 25.7 mm tread diam., 20.9 mm i/d., hub 0.4 mm out from the tyre.

Casting prices and stock . GWR loco sets, price list

Scan of a casting in sets for GWR 4-6-2 Great Bear.

Scan of casting B149

Cross section diagram of casting B149
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