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A 7 1/4 inch gauge Crampton 2-2-2, scaled up from the 5 inch gauge design by Brian Arridge published in "Engineering in Miniature" magazine. Work to date comprises some profiled frames and a nicely made silver soldered copper boiler, complete with manufacturer's test certificate dating from 1996.

Whilst it could certainly be progressed as its intended design, the boiler looks equally useful for all sorts of other projects. Dimensions are:

Overall length 22 1/2 inches
Barrel diameter 5 1/2 inches

Outer firebox:
Length 7 1/2 inches
Height top of outer wrapper to foundation ring 8 1/2 inches
Width 5 3/4 inches