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#15
April 9th 09, 05:54 PM
posted to rec.aviation.soaring
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Winch Signals
On Apr 9, 9:31*am, Andy wrote:
*Pulling a sliding plate flue damper "all out" gives maximum flue draw and the hottest fire. On further reflection the term could have come from pipe organs where "stops" are pulled out to control airflow and hence sound volume. Pipe organs predate 1300. ref http://en.wikipedia.org/wiki/Pipe_organ There must be a reference to the origin somewhere on the internet but I didn't find it yet. Andy 
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