Sold December 2021 Back to Archive

7 1/4 inch narrow gauge 0-4-2T "Bicton" - stock code 9767

A well-advanced 7 1/4 inch narrow gauge 0-4-2T locomotive, designed and built as one of a batch of three locomotives some years ago - one was completed, this one was built up to an air-running state, complete with boiler.

Conceived as a sit-in design by a chartered engineer - a man with 25 years experience in the aero industry - as an evolution of Roger Marsh's "Tinkerbell". He had previously designed and built the motion for one of the Moors Valley Railway locomotives, to which this engine bears more than a passing resemblance. Drawings were done in SolidWorks, a set on CD are included.

Platework was laser cut, much of the machining work was done on the designer's CNC mill. The motionwork features sealed ball bearing units throughout to reduce maintenance.

Cylinders are 3 1/2 inch bore, the CE-marked boiler was supplied by Bell Boilers and is complete with their documentation, designed and tested at 300psi for 150psi working pressure.

In addition to the chassis and boiler there is a smokebox, chimney base casting, grate and ashpan. The inner dome cover is fitted with a pair of part-built safety valves.

length/inches 73
width/inches 26
height/inches 36
weight/kg est 500
bore x stroke/inches 3 1/2 x 4 1/4
wheel material cast iron
axlebox type plain bearing
cylinder material cast iron
valve type slide
valve gear Walschaerts
boiler number BB269
year built 2008
boiler maker Bell Boilers
CE mark yes
working pressure/psi 150
boiler type locomotive
boiler material steel
boiler construction welded, expanded tubes