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1:32 scale
P39, P40
LNER 4-6-2 A1/A3, B17 driving wheel.

6′ 8″ diam., 20 spokes, rectangular inner rim, apparent tread 4¾″, tyre thickness 5⅜″.
Hub 21″ face dia., pin between at 13″, hub is level with the tyre.

Sources: No 4472 measured direct at Llangollen in Feb. 1995.
O.S. Noch, British Locomotives of the 20 th Century, vol. 1: page 219, detailed works drawings.

Casting: 63.5 tread dia., 55.9 i/d, hub level with the tyre, pin at 10.3 mm.
Tyre thickness for exact scale modellers: 5⅜″ at 1:32 = 4.3 mm.

Casting prices and stock . LNER loco sets, price list

Scans of castings in sets for:
LNER 4-6-2 A3 with prototype images, 4-6-0 B17 (GE tender), 4-6-0 B17 (LNE tender).

Scan of castings P39, P40

Cross section diagram of casting P39, P40

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27 Mar 2013