Ventilator en demper

De intensiteit waarmee de brandstof verbrandt, en daarmee de temperatuur van de vuurhaard, wordt geregeld door de luchtinlaat in de vuurhaard. Zuurstof in de lucht voedt het vuur.

The primary way to feed air to the firebox is by opening the regulator and cutoff fully and propelling the vehicle. As the steam is expelled cylinders out into the atmosphere through the chimney, with every gear cycle, it creates a vacuum in the firebox, drawing in fresh air.

Daarnaast zijn er twee bedieningselementen die zijn ontworpen om trek, ventilator en demper aan te passen.

Blower is usually operated by a valve. When open, it releases steam from the boiler to the chimney. This creates some vacuum in the firebox, drawing in fresh air. However, since this airflow is vastly inferior to acceleration airflow, the blower is only efficient to use when stationary.

Damper is usually operated by a lever. When closed (pushed down) it chokes the airflow whatsoever, drastically reducing fire temperature, even if the vehicle is accelerating. This is used to intentionally cut steam production when it is no longer needed.