A well-made 5 inch gauge "King Arthur" to the Greenly design, a big engine which weighs in at around the same as a Britannia.

Silver soldered copper boiler with superheaters, working pressure 80psi, feed by twin injectors with a double-acting handpump mounted beneath the tender. Steel "brick arch" in firebox. Cast iron cylinders with piston valves actuated by Walschaert's gear with screw reverser in cab. Mechanical lubricator. Vacuum ejector with driver's brake valve and gauge in cab.