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Posted for "Jerry Grimmonpre" <jerry@mc.net>:
John ... I agree with Dan Schaefer ... hang in there. I too have felt the
pressure from the NIH syndrome but will continue to invent as I go along.
I recently created a robust method to attach cowling w/o relying on piano
hinges. The lower cowl will be removable with only 8 hex head counter sunk
screws. The top cowl sides will have about 6-8 screws each side. Over the
top of the firewall ... no mechanical fasteners at all. I have plenty of
building to go before all of this gels so please be patient. I have no
pictures and no hard copy plans to share at this time. This is for my RV7A
but the problems/solutions are about the same. A mentionable feature is that
the screws will be counter sunk into phenolic rod pieces about 3/8" long.
These are bonded into the cowl. The screws nest in this armored piece and
attach to nutplates. The heartache of glass wearing under the screw head will
disappear with this creation.
So John, we need richly endowed creative builders and it's apparent you are
very blessed with creativity. You have a very small problem to solve to
isolate the loss of ram out through the filter. It could be done with
something similar to a large ball valve cut in 1/2. Of course it would have
to be light weight and possibly of sheet metal. The 1/2 ball valve side could
block off one side of the filter and a 1/2 sleeve could block off the other
half, together they create a sleeve for ram air. When filtering is desired
the ball is rotated to block ram and open the side of the filter. The other
side of the filter allows a pathway around the 1/2 sleeve and into the
induction.
Thanks for sharing your filter system and I feel you'll serve-up a solution.
We RV builders need this filtering system too. I would use it.
Best regards ...
Jerry Grimmonpre
Hang in there, John.
A "can of worms" is the worng definition - this is merely the usual spirited
debate often kicked off on this forum by what is a neat idea, but carries
the NIH (Not Invented Here) syndrome.
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