2 1/2 inch gauge LNWR Jubilee 4-4-0 "Black Prince"

Originally designed by Webb as a four cylinder compound, in which form the locomotives proved unreliable, they were all rebuilt by Whale as two cylinder engines.

The model takes this a step further, with a single cylinder driving a heavy flywheel, gear driven to the wheels and fitted with slip eccentric valve gear. It runs beautifully on air, the wheels ticking over smoothly at a walking pace courtesy of the reduction drive.

The boiler is spirit-fired, fitted with a six wick burner.