LOCO SPECIFICATION


Scale:-                  10mm to 1 foot


Length:-                 660mm (26”)


Track radius:-       2.3m (7’6”t) minimum


Weight :-               5Kg  (10 lb ) est.


Fuel :-                    Alcohol  (Methylated spirit) supplied by constant

                               level feed system to a ‘toast rack’ style wick burner.


Boiler :-                Internally fired, multi flue, superheated, with safety valve.

                             Built from copper and bronze, silversoldered throughout.

                            Tested to 200psi  (13bar)

                            Maximum safe working pressure 100psi (6.5bar)


Controls :-   loco:    Regulator, blower, low water level  test valve, pressure  

                              gauge.

                 tender:   water pump bypass,  fuel valve.


Cylinders                Two, 12.7mm dia x 22mm stroke (1/2” x 7/8”)


Valvegear               Slip eccentric, slide valves, between frames


Lubrication             Displacement (Rosco) type.


Water feeds           Tender carries water in rear tank containing  hand pump.

                              Loco has axle pump driven from driving axle.


General                  Buffers and coupling hooks sprung.

                             Main loco axleboxes individually sprung.

                             Pony truck  sprung.

GWR 47xx
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