These models are all designed to the same specification. They have; steel loco frames that are sprung on each axlebox. The bogie is a bar frame type with central springs and working equalising bars, just like the Churchward design. The working outside cylinders are fitted with ‘O’ ring seals to the piston heads and piston rods. The valvegear is a robust and reliable slip eccentric type, protected from accidental damage between the frames. Our new steamchest design eliminates the use of sealants. An axle pump, driven from the driving axle, is of a recent design that allows easy access to the valves should foreign bodies find their way in. Lubrication is by the displacement ( Roscoe) type.
The boiler is internally fired and heated by our well proven , multi wick burner. It is fitted with safety valve, regulator, blower control, pressure gauge and water level test cock. The clack valve is mounted off the boiler.
The tender holds a generous supply of methylated spirit that is fed to the burner through a simple level control to give a constant supply at the burner. There is also a fuel shut off valve. Refilling is via a sealed push-in filler plug that can be used whilst the loco is in steam. The remainder of the tender is the boiler water tank that also houses the hand pump, used to feed the boiler when the loco is stationary. The by-pass control that regulates the axlepump delivery to the boiler, is part of this assembly.
There is a sensible level of detail above the footplate, bearing in mind that fine,delicate features tend to get damaged on live steam models when they are cleaned down with rag after use.
Some brakegear components are supplied that will allow the modeller to ‘fill in the gaps’ under the loco and tender, however a full representation of the full size design is not possible, or even practical. Messers Churchward and Collett did not have spirit sumps, feeds and burners to contend with. Also remember that for these components to look right, their strength may not be sufficient to withstand the knocks they may receive in a derailment.
As with most railway subjects that are modelled, if you are a firm enthusiast for absolute authenticity, then work from a photo of your chosen model to ensure that you have the correct variants fitted on the date the picture was taken. As producers of kits we do not pretend to know and cover every modification, we produce a faithful ‘generic’ model, usually based on the original design. This model has been designed with a 3500 gallon tender.
Scale:- 10mm to 1 foot
Length :- 630mm (24.75”)
Track radius:- 7’ft (2.13m) minimum
Weight Kg ( 10-12lb ) 5-5.5kg Approx
Fuel :- Alcohol (Methylated spirit) supplied by constant
level feed system.To ‘toast rack’ style wick burner.
Boiler :- Internally fired, multi flue, superheated, with safety valve.
Built from copper and bronze, silver soldered 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, 1/2” bore x 7/8” stroke ( 12.5mm x 22mm)
Valvegear :- Slip eccentric, slide valves
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.
Bogie axle boxes sprung.