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L&YR Class 28 (29) Mogul Experiment 4mm (WSF)
This is a 4mm scale model of the Lancashire and Yorkshire Railway (L&YR) Class 28 Mogul Experimental Locomotive.
Historically George Hughes took the design of a Class 28 locomotive and made some alterations.
It is generally thought that 5 foot 6 inch wheels were used instead of the usual 5 foot 1 inch wheels and the running plate was extended to provide room for a Pony Wheel and a few other tweaks were implemented.
At least one drawing of the locomotive exists but as to whether it looks exactly the same or was actually built is debatable.
Several email exchanges have been made with the NRM about the drawings so the aim is to visit and purchase the drawing/s and get solid details on the mystery locomotive, as a result what we have here currently is a possible representation of what the engine could have looked like, but currently nothing is set it stone. If the conclusion ends up being different then a Version 2 will likely be made.
As there was no Class 29 on the L&YR it was suggested and that this locomotive could indeed be considered a L&YR Class 29. Makes sense.
The Photographs show the original version before some small detail updates.
BODY INSTRUCTIONS: The Smoke-Box Door is located on a sprue and 2 different types of buffers that the Class 28s ran with. This gives you the choice of using either or substituting them with metal ones from other manufacturers without having to hack them off a buffer beam. The Reverser Rod is located just below the boiler - this needs to be removed and joined to the left hand side of the locomotive starting at the hole in the
cab sheet and finishing towards the lever in between the front Splashers (Wheel Arches). You
will need hand rail pillars or split pins and 0.45mm rod for the hand rails. To make the accurate
positioning and fitting easier, holes have been slightly indented on the body; they just need
drilling out. Couplings are left for the user to decide based upon preference, utilise the slightly
indented holes on the bottom of the chassis at the front by drilling them out; this is to locate a
home made goalpost from Brass or Nickel Silver rod that is compatible with Tension Lock
Auto-Couplers. To fit the chassis to the body the rear simply slots in at an angle.
The front is fixed via a screw or bolt that in WSF and FUD self taps easily and is all that is needed, a nut can
be glued in place inside the Smoke-Box Saddle if desired.
For the Mogul Experiment the Pony Truck swivels on the same pivot as the fixing hole so when
the Chassis to Body retaining bolt is in position, as long as it isn’t forced tight the Pony turns
freely. Several Pony Wheel sizes can be used depending upon how far up you screw the retaining
bolt and 2mm brass bearings can also be added for an optional consideration.
This body shell can be fixed to several Ready To Run (RTR) chassis with a little tweaking,
alternatively a specially designed chassis is also available separately either gauge.
The under side of the firebox and boiler has been cut out with a 12mm width to fit 10 or 12mm width motors, for wider motors you'l have to use a file or similar to open it out even more. The cut out itself is sprue joined under the foot plate so you can glue it in whole or cut it to size and use only a prt of it. Cetainly easier than hacking away at the underside.
CHASSIS INSTRUCTIONS: Please see the Chassis themselves for more information.
For wheels, axles, crankpins etc
Alan Gibson is a great resource
For the L&YR Class 28 and Mogul Experiment, to allow your model to be motorised without having to hack away at the underside of the firebox or boiler as is common with many of kits depending what parts you use, a Roadrunner Compact + Gearbox and a 1220 Mashima Motor from High Level will fit nicely, although it is rather small and may lack power if the trains are too long. If using this combination the gearbox sides will need to be packed width ways with plasticard or similar, these components were used in the research and development trial builds.
EDIT: Future builds have shown that a London Road Models GB4 Single stage Motor Mount (Gearbox) fits better, is cheaper and quicker to build. As with all loco kits the choice is entirely yours though.
But of course you can use whatever suits your needs and preference best,
the above has been typed out to hopefully aid you should you be new to kit building. The advantage of these 3D printed kits is 90% of the work is done for you, both on the body and the chassis.
For a video series on building SCC locomotive kits...