Enid

The boilers are inclined on the locomotives, to ensure that the boiler tubes and the firebox remain submerged when on the gradient, a standard practice on mountain railways - the locomotive always runs chimney-first up the mountain. The water gauges (gauge glasses) are mounted half at the centre on the locomotive so that the water level does not change with the gradient. One result of the boiler's angle is that the firehole door is at waist height, requiring the fireman to lift the coal some distance. The boiler is not superheated.

Ernest is based on the Snowdon Mountain Railway's "Enid".