H&TL Wootten Draft Control on 2-8-0 named "Manitou"

Here are a few photos. The bottom one shows the Wootten Draft Damper. When I first saw that, it looked like a stove draft inlet, but I thought no It must just a painted design. But as it turns out, it is exactly a version of the common stove air inlet. But it differs from a stove air inlet in that it is intended to, when opened, cut off the actual fire draft coming through the grates by opening the alternate inlet directly into the smokebox. So it was actually a refinement of throttle control by allowing an engine to run full throttle, and then cut down on unneeded draft that arises with full throttle.

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Edited 1 time(s). Last edit at 01/25/2021 04:56PM by Ron Keagle.