"Caterpillar" - a freelance 4-12-2
Frames 33 " overall
Coupled Wheels 2½ " diameter
Three Cylinders 7/8 " bore x 1 1/8 " stroke
Slide valves driven by inside slip eccentric gear
Boiler barrel 3¾ " o.d., wide firebox with combustion chamber, coal fired
Six Sheet Drawing set available from Reeves (2000), cat no 29/513.
sheet 1 : General arrangement and main frames
sheet 2 : Driving wheels, coupling rods, axles, eccentrics
sheet 3 : Cylinder details
sheet 4 : Inside cylinder, inside and outside valve gear, mechanical lubricator, complete boiler
sheet 5 : Boiler details, smoke box
sheet 6 : Cab, fittings and tender
Main Horns and Axleboxes
Coupled & Driving wheels
Bogie, trailing truck and tender wheels
Tender bogie sideframes
Cylinder blocks and steamchests
Eccentric straps, pump bodies, etc.
Note : some castings are available from the Association.
The constructional series appeared in English Mechanics between 27th September, 1935 and 27th March, 1936.
TEE Publishing can supply a reproduction booklet of the constructional series [price was £4-25 in 2002].
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