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1:32 scale
BR 4-6-2 Britannia driving wheel.

6′ 2″ diam., 20 oval spokes, vee shaped inner rim, apparent tread 3½″, tyre width 5½″.
Hub 16½″ face dia., level with the tyre, pin between at 14″.

Source: preserved loco. 70013 measured direct at Bressingham.

Casting: 58.7 mm tread dia., 53.1 mm i/d., hub level with the tyre, pin at 11.1 mm.
Measured tyre widths for exact scale models at 1:32, 5½″ = 4.37 mm.

Casting prices and stock . BR loco sets, price list

Scan of a casting in a set for a BR 4-6-2 Britannia class with a prototype photograph.

Scan of casting P71
Prototype wheel photo

Cross section diagram of casting P71

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27 Mar 2013