GWR 48XX/14XX 0-4-2T – 10mm scale


Click here for prices

See the Wikipedia page for further details

NOTE – This is only available in 10mm scale.

GWR 14xx - side X section
GWR 14xx – side X section
GWR 14xx - lower side X section - OSM
GWR 14xx – lower side X section – OSM
                OSM version at bottom   
The pictures show the original version - this has now been upgraded to a full scale backhead design with the regulator below the footplate and a superheater pipe running through the flue replacing the steam dryer tube in the smokebox  

Technical specification

Boiler 1.5″ diameter x 5.84″ long, single 15mm flue
water capacity 5 cubic inches – almost identical to the ARM1G design
achieved by fitting a 15mm flue and piping the regulator and remote safety valve via the functional dome
this enables the full capacity of the tube to be used – no air space required near the top

Regulator valve – radio controlled

Burner Keith Bucklitch poker type for 15mm flue – smaller diameter than 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 - slimmed at the top to fit within the narrow smokebox saddle  
        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           

Operation

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
trying to race the main line train away from the station – this actually happened with 14XXs & Castles!
all easily done with an electrically powered model, but rarely emulated with steam power.

Availability As soon as I have got the prototype satisfactorily proven. It has been held up by the ongoing development of both the T9 and the radio control system.
Note the radio control system is operated by a user supplied mobile phone or tablet

References

Wikipedia            https://en.wikipedia.org/wiki/GWR_1400_Class
Beattie I.             Drawn & Described                                                       Peco          ?
?                         Locos of the GWR part 6 – Four-coupled Tank Engines RCTS         Out of Print
Russell J. H.      A Pictorial Record of Great Western Engines               OPC           Out of Print
Harris M.           Locos Illustrated 60 – Great Western 0-4-2Ts               Ian Allan     Out of Print
NRM                 Works GA drawings

Preserved locos – 1420, 1442, 1450 & 1466 – see the above Wikipedia page for current status and location

Downloads

Click here to download the following from Google Drive –
                Common loco instructions pdf – see below
                GWR 14XX loco instructions pdf and specification
                Generic loco parts instructions pdf – see below
                Southern valvegear instructions pdf
                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 GWR 14XX – to be added later

Click here to see transfers – to be added later