Our model represents the 42xx, 52xx and 72xx classes covering the majority of the class. The model is designed with working outside cylinders which with the small wheels will give a high tractive effort. Inside slide valves are driven by a simple, robust, and easy to set, slip eccentric gear. A hand pump is located in one of the water carrying side tanks which also feeds water to an axle driven pump. The bunker will carry the meths tank.
Scale : 10mm : 1ft
Length : 42xx/ 52xx 408mm over buffers
: 72xx 448mm over buffers
Radius min : 42xx / 52xx 2.5m (8’3”)
:72xx 2.61m (8’8”)
Weight : 5 Kg estimated.
Fuel : Alchohol (Methylated spirit) supplied by constant level feed system.
: to a multi-tube ‘strand wick’ burner.
Boilers : Internally fired, multi flue, superheated. with safety valve.
: Built from copper and bronze, silver soldered throughout.
: Tested to 200psi (13bar)
: Max.allowable working pressure 100psi (6.86 bar)
Controls : Regulator, blower, pressure gauge and possible water gauge.
: Spirit valve in rear bunker
: Bypass valve on side tank for water pumps.
Cylinders : Two, Outside 14.3 mm dia x 25mm stroke (9/16” x 63/64”)
Valvegear : Slip eccentric, slide valve, between frames.
Lubrication : Displacement (Rosco) type with filler and drain.
Water feeds : Water carried in both side tanks
: Hand pump with bypass valve in side tank.
: Axle driven pump with its pipework, clack valve and boiler feed.
General : Loco suspension, buffers and coupling hooks sprung.
: Wheels and axles are to Gauge One ‘Standard’ dimensions.