GWR 48XX/14XX 0-4-2T

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All contents (including photos and drawings) - ©  2020 Derek Mackenzie Click here for prices  GWR 48XX/14XX 0-4-2T - Kit or Ready-To-Run     10mm scale  See the Wikipedia page for further details  NOTE - This is only available in 10mm scale. GWR Dukedog 4-4-0 9017, Earl of Berkeley GWR 48XX/14XX 0-4-2T at Severn Valley Railway

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   

         

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



 


     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