Diagrams Index . Home
7 mm/ft scale
B311
GWR 2-8-0 47xx driving wheels.

5′ 8″ diam., 18 oval spokes, rectangular inner rim, 4″ apparent tread.
Hub 16½″ face dia., 1½″ out from the tyre, pin in line at 15″.

Sources: Works drawing No. 57236, Swindon April 1919, for Lot 214, No 4700.

Casting: 39.7 mm tread dia., 34.9 mm i/d., hub 0.9 mm out from the tyre, pin at 8.75 mm.

Casting prices and stock . GWR loco sets, price list

Scan of the castings in sets for a GWR 47xx

Scan of casting B311

Cross section diagram of casting B311
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