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Posted for "Mark Ravinski" <mjrav@comcast.net>:
This is the plenum I built several years ago with good results.
A foam core was first shaped and then glassed over.
The "inside" wall is a piece of .060" g-10 epoxy glass fitted between the
last two fins on each cylinder.
The change results in a net weight savings when done.
Mark Ravinski
N360KB 1365 hrs.
110-1069_IMG;110-1063_IMG
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