PRUSSIAN MILITARY LOCOMOTIVE NUMBER 447 3D model

This conical-boiler locomotive was built by the Hohenzollern Locomotive Works for militiary use in the field and in fortresses. The gauge was 600 mm (1 ft 11 5/8 inches) It was given N� 447. It has the wheel arrangement 2-2-2, with bizarrely small wheels.

The conical boiler had the firebox and grate completely contained inside it, with firetubes running upwards to the front tube plate. The boiler therefore had a small volume and in use was completely filled with water. The only steam space was in the top of the over-sized steam dome. Judging by the two try-cocks on the side of the dome, the dome was expected to be about a third full of water. This approach was used to ensure that the top of the firebox was covered with water even if the locomotive was tilted by poor temporary track.

The cylinders (presumably there were two) were mounted inside the frame ahead of the driven axle. A pipe can be seen below the smokebox which took the exhaust to the blastpipe.