Engine and boiler space with the refillable gas tank under the starboard floor and the oil separator tank under the port floor, note the skylight over the engine and Windermere kettle.
Note, throttle and forward-reverse servos under the floors.
Horizontal fire tube boiler,  providing steam for the twin cylinder, double acting slide valve engine.
Twin cylinder double   acting steam engine, note throttle and reversing linkages, displacement lubricator and the boiler with water level gauge and pressure gauge.