scan of casting D103  Scan of castings D440

Scan of castings D441  Scan of castings D442

CAST IRON WHEEL CASTINGS
for EAR (East African Railways) 4-8-2+2-8-4 class 59
(with slightly underscale plain wheels for increased flange clearance.)
at 1:16.8, for metre gauge on 59.5 mm., or slightly under gauge on 2½″ track.

A full set consists of 12 x D103 plain wheels, 8 x D440 outer, 4 x D441 intermediate and 4 x D442 driven wheels.

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Wheel data:  D103  .  D440, D441, D442

Bare weight c. 5.880 kg.

The works drawings show that the wheels were designed to be capable of conversion or building to suit Cape Gauge by changing the position of the tyres on the wheel centres. The wheels suit 3′ 6″ gauge with the tyres in the normal position (above the inner rims), or, as built, with the tyres set back by 1 3/16″ on the wheel centres with the face of the tyre 13/16″ below the inner rim to reduce the back to back by 2 3/8″ for the EAR Metre gauge. I have allowed enough material on the castings for either version to be machined.

1:24 is slightly underscale for metre gauge on 45 mm track, for a more exact scale use 41.7 mm track (or model at 1:22.2).

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28 Mar 2013