See attached picture for one way, not necessarily the easiest or best. I formed fiberglass rings with U shaped cross section, split, and bonded to top an bottom of plenum assembly. These hold half inch square rubber foam strip glued in place which push against flat flanges bonded into the inside of the cowl upper and lower halves. Works fine, but mis-aligns with engine sag. There are many options. See also work by Chris Zavatson which includes a fine article addressing this issue.
Fred Moreno
-------Original Message-------
Gents,
A question for those of you who have built a shroud over their engine
baffles to seal the cooling chamber instead of using the rubber mat
contacting the upper cowling. I'm having a bit of a quandary
figuring out how to tie it all in with the cowling air inlets. Would
any of you who have used this method mind sending me a picture or
description? Legacy FG with IO-360. Many thanks.
GC
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