Blackwall Y4 0-4-0T GE/LNER/BR

A powerful and compact 0-4-0 tank locomotive with outside cylinders and Walshaert's valve-gear based on the LNER Y4 (GE B74) tank locomotives built to shunt the London docks. The prototypes were the most powerful British 0-4-0 locomotives.

The model was initially designed by R J Bray using the freelance 'Chub' locomotive as the basis of the Y4 and construction described by Ross Harrison in Engineering in Miniature magazine commencing in late 1980. The model was extensively redesigned in 2012 by Doug Hewson to be "very near to scale" and new patterns for prototypical cylinders and wheels with correct oval spokes were made. Other significant changes include redesigned brake gear, repositioning of steam brake cylinder, redesigned ash-pan, and addition of stainless-steel radiant superheater elements. Because of the scope and nature of Doug Hewson's redesign, in general the two different model parts are not interchangeable. Doug Hewson intended the locomotive to be a beginner's locomotive as well as one for the experienced modeler.

Doug Hewson's design does not include a boiler water-pump as he did not approve of them! It has two injectors.

The model makes a small but powerful hauler, Doug Hewson has hauled 12 adults with his, and the short wheelbase allows it to traverse curves down to 10' radius.

The construction series of the R J Bray designed model complete with drawings commenced in Engineering in Miniature (UK) magazine Volume 2, Issue Number 5, October 1980, page 137. The redesign by Doug Hewson had a separate very complete and detailed construction series complete with drawings in Engineering in Miniature (UK) magazine commencing in Volume 33, Issue number 9, March 2012.

Drawings, castings, and many laser-cut parts are available from Doug Hewson Models.



Section heading
Write the first section of your page here.

Section heading
Write the second section of your page here.