LMS 3F 0-6-0T – 10mm scale (1/32 version soon)

LMS 3F - 5-views
LMS 3F – 5-views

Model description

Based largely on the ARM1G design this has a modified boiler with a working dome that feeds the remote safety valve and increases water capacity. The cab is mostly clear with a low mounted poker burner and the regulator below the footplate. There is no backhead as this is barely visible within the cab and would have pushed the cost up. This could be provided 3D printed in a high temperature tolerant plastic resin (at extra cost) if you really want it – I have not got round to modelling it yet. Only needs a driver figure & fireman to complete the effect. They would also help to hide the poker burner. It would be good to have the driver leaning out of the cab with a rotating head linked to the reverser so that he looks in the direction of travel – no prizes for the first to do it!

Like all of my current models this is entirely made of nickel silver with lost-wax brass castings made from 3D printed masters, copper boiler, thick walled brass gas tank and, in this case, cast-iron wheels. The boiler uses a single flue with a poker burner that is remotely adjustable for idling.

The model is radio controlled only – no manual option – it would have involved too many compromises.
See here for more details of the R/C system. It provides controls for the regulator, reverser, idling the burner and uncoupling. It also provides feedback on speed, boiler pressure, water level and battery voltage with warnings when pressure goes too high, or voltage or water level too low. The system is fully integrated at no extra cost.


Boiler      42mm diameter x 6.46" long, single 0.75" flue               
        water capacity 6.6 cubic inches - almost identical to the ARM1G design      
        regulator valve - radio controlled, mounted below footplate         

Burner      Poker type for 3/4" flue - similar to the Roundhouse type               
        secondary gas control valve for idling - radio & computer controlled            

Gas tank        Rectangular brass filling the bunker - approx. 2.8" x 1" x 1.5"         
        gas capacity 3.4 cubic inches - 60% of ARM1G capacity               
        primary gas control valve (on/off) - top feed                   

Cylinders       ARM1G design - some improvements                    
        2 x 11mm bore x 17.6mm stroke                   
        remote reversing & variable cutoff via Southern valvegear - radio controlled        

Alternative oscillating steam motor (OSM)                       
        2 x 11mm bore x 12.4mm stroke   Double acting, 1:2 reduction gear       
        remote reversing via shuttle valve - radio controlled               

Radio controlled couplings                          

Construction - etched nickel silver sheet, lost-wax brass castings, customised transfers to user requirement    
        Painted to customer's requirement                   


Unlike the majority of Gauge 1 locos which spend their entire time going round in circles (usually at excessive speed) this locomotive has been designed from the outset for use on an end-to-end branch line. Of course it can still do the above mentioned circles.
The objective is to remotely control the loco so that it can do everything that a real life branch line loco can do – e.g. running round the train at each end of the branch, shunting mixed goods at intermediate stations, waiting in “idle” mode for connecting trains at the branch junction station,
acting as station pilot – all easily done with an electrically powered model, but rarely emulated with steam power.

Availabile now to order

    Note the radio control system is operated by a user supplied mobile phone or tablet     

There is a strong possibilty that I may get round to producing a 1/32 scale version of this.

This is my most popular model – hopefully the 1/32 version will be even more popular.

My LMS PI Suburban carriage set kits for this will be available mid 2022.

SPECIAL OFFER – this 10mm scale prototype will be available for sale at the next show – see here for details.


Wikipedia                           https://en.wikipedia.org/wiki/LMS_Fowler_Class_3F
Hunt, Essery & Jennison      LMS Locomotive Profiles No. 14 – The Standard Class 3 Freight     Wild Swan      The definitive guide
NRM                                 Works GA drawings  – also in the above book

Preserved locos – too many to mention – see the above Wikipedia page for current status and location


Click here to download the following from Google Drive –
                LMS 3F loco instructions pdf
                LMS 3F loco specification

Common loco instructions – see below
Generic loco parts instructions pdf – see below
Southern valvegear instructions pdf – see below
Radio control instructions pdf – to be added later

Click here to download the punching rivets PDF from Google Drive and other common PDF documents

Click here to see my detail photos of the preserved LMS 3F – to be added later

Click here to see transfers – to be added later