What engineering development helped manage airflow for burning dense coal?
Answer
An artificially induced draft using exhaust steam
Burning coal is significantly different from burning wood because coal is denser and requires a more controlled, steady airflow beneath the firebed to maintain combustion. To achieve this, engineers implemented an artificially induced draft system, where exhaust steam was directed up the smokestack. This created a vacuum that pulled air through the grate, providing the necessary oxygen to keep the coal burning at high temperatures. This technique became a standard feature in locomotive engineering, ensuring that steam production could remain consistent even when using dense fuels.
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