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Measuring Airflow Through Porous Wood
By Craig Smith

Mike Kitner mentioned that he would like to measure the leakage
through various woods, like red gum, to see the difference between
them.  Well, Mike, you have provided help to a lot of people over the
years and I welcome the opportunity to return the favor.

Several years ago, my friend Phil Dayson demonstrated just such a
device at the annual MBSI meeting in Seattle.  As a direct result
of his efforts, I was able to design and build a similar device which
I used to measure the leakage of a set of pneumatics that I needed to
restore.  Phil's device uses liquid manometers and mine uses Magnehelic
pressure differential gauges.  I demonstrated my version at the last
MBSI meeting in Philadelphia.

Phil's description is in the MMD Archives and, if you'd care to contact
me, I would be glad to describe how I made my device.  With it, I was
able to confirm that the method I used to seal the pneumatics reduced
the leakage from as much as 100 cubic inches per minute to as low as
3 cubic inches per minute.  I was able to see the difference made by
sealing one tiny pinhole.

Regards,
Craig Smith

 [ See Phil Dayson's articles indexed at
 [ http://mmd.foxtail.com/Archives/Authors/Aut783.html  -- Robbie


(Message sent Thu 16 Mar 2000, 14:55:48 GMT, from time zone GMT-0500.)

Key Words in Subject:  Airflow, Measuring, Porous, Through, Wood

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