Diagrams Index . Home
7 mm/ft scale
GWR 4-6-0 Castle later driving wheels.

6′ 8½″ diam., 22 oval spokes, rectangular inner rim, 4¼″ apparent tread.
Hub 17″ face dia., 3″ out from the tyre, pin between at 13″.

Sources: Swindon drg 96784; Russell vol. 2 p. 154, drg of 7007 'Great Western'; Haresnape, Collett & Hawksworth Locomotives, p. 29, photo of 5073 'Blenheim Castle'
Photo on web at http://www.warwickshirerailways.com/gwr/gwrls163.htm of 4037 in 1937 with reinforced drivers.

Casting: 47.0 mm tread dia., 41.7 mm i/d., hub 1.75 mm out from the tyre, pin at 7.6 mm.

Casting prices and stock . GWR loco sets, price list

Scan of the castings in sets for a GWR Castle

Scan of casting B310

Cross section diagram of casting B310

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27 Mar 2013