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