Creative Common Attribution-NonCommercial-ShareAlike CC BY-NC-SA

This is the model for a SECR-designed and SECR/SR-built van to Diagram 1426. Several of these vans were rebuilt with ventilated sides for use on London-Dover-Folkestone fruit traffic, subsequently labelled as Diagram 1427.  This van survived into BR revenue-earning service, and several becoming departmental vans in the black livery.

There were both unfitted and vacuum fitted versions, and a brake cylinder has been provided for the latter. You will need to source vacuum pipes yourself, however!

Please note a few caveats:

The model is based on the images of a wagon in the The National Railway Museum at Shildon catalog number: 

This is a model of the early Stockton and Darlington railway Chaldron wagon. The model is based on the one at the National Railway Museum in Shildon. These wagons are small when compared with later wagons. These should make a good companion to go with the Locomotion design.

https://collection.sciencemuseumgroup.org.uk/objects/co206060/chaldron-wagon-stockton-darlington-railway-railway-wagon

This describes my 10mm version of Peter Davis' brilliant model, including my construction notes and STL files for the new parts made.  This is now a revised version with additional new parts.

Enlarged version of my G1 Sentinel.

The largest piece is the body at 224.1mm long.  My Elegoo Neptune pro printer has a table that will accommodate this.

May 24           Source for Delrin sprockets and chain in UK, suggested by Robert SP (thank you Robert):

KARLGARIN MODELS January 2019
Warren Farm, Little Baddow, Chelmsford, Essex CM3 4TQ
Tel: (0)1245 226110 E-mail: skippy@karlgarin.com

9/Feb/24 Updated: G3-22.0 Handrail 1.stl    Shortening height form 5mm to 3mm.

The parts are called 'Active' because that was the locomotives original name. Michael Bailey's report is here: https://www.railwaymuseum.org.uk/sites/default/files/2023-10/Pages%20from%20LOCOMOTION%20report%20part%201.pdf

The files contained here are experimental and have been made available for development purposes only. There is not yet sufficient to make a complete locomotive.

This is still in development - if you find a problem or have suggestions for improvement please send feedback.

The initial inspiration was to create a representation of a coal load or ballast track bed.

The code is capable of generating a simulation of a full coal load, part used coal load or wagon fill, coal pile, flat spread/ballast, straight track base, radius track base. 

The track bases can be used to merge with track models before printing or can have a slot cut for using loose track.

Here is some openSCAD code that can be used to create handrails and stanchions.
The code is still underdevelopment.

To use you can either create and 3d model for a single stanchion or the code can be used to create a single modle multiple stanchions and handrails.

Currently limited to a single style of stanchion and cylindrical handrails.

The first image shows what is generated by the default openSCAD code.

No STLs are currently provided as these would depend on usage.

Sentinel Y3 Locomotive.

May 24           Source for Delrin sprockets and chain in UK, suggested by Robert SP (thank you Robert):

KARLGARIN MODELS January 2019
Warren Farm, Little Baddow, Chelmsford, Essex CM3 4TQ
Tel: (0)1245 226110 E-mail: skippy@karlgarin.com

22/Feb/24         I found Flats should be filed on the Jack Shaft and the Axle Shafts where the Sprocket set screws seat.