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Looks like the first message got bounced, so here it is
again with smaller photos
----- Original Message -----
Sent: Thursday, May 24, 2007 8:24 PM
Subject: Re: [FlyRotary] Re: intake tubing
No, Marv, not of the complete process, just bits and
pieces as it occurred to me to photograph them and I had a camera
handy.
Photo 3 Silicone Cores - pretty much shows how simply
it is. I cut a half/moon circle from a 3" thick piece of foam board and
suspend the cores down in the void as shown. Then slap a piece on the side
of the cut out to hold the resin in and then pour. I use a short section
of metal tube at the top of each core to made certain that portion is
perpendicular to the top. This is so that the aluminum tubes which will
stick into the holes left in the bottom of the plenum by the cores will
have a straight hole to slide into.
Photo 5 Installed, shows the outside of the plastic plenum
with TB mounted to a mounting plate (thicker area of plastic through which the
TB air passage is drilled) as installed on the aircraft.
This is the one I am currently flying with. The
plenum sits on a 3/16" thick aluminum plate with holes drilled for the aluminum
tubes. This plate is then bolted to the plenum using bolt inserts
installed in the plastic. I use "O" rings and shape a cone shape into the
holes in the plenum so that when bolted down the plenum pushes down on the "O"
rings against the aluminum plate and seals the intakes.
Anyone interested in more can got to this website (or many
others) and get more information. I used both the Featherweight and Task 8
resins. Task 8 has a higher temperature capability and is the one I am
currently flying with.
Ed
----- Original Message -----
Sent: Thursday, May 24, 2007 7:35
PM
Subject: [FlyRotary] Re: intake
tubing
Hey, Ed... got pictures of the
whole process? How about sending them along?
<Marv> "Ed Anderson" < eanderson@carolina.rr.com>
wrote: """ I find that for the throttle body plenum it works very
well. You suspend silicon rubber cores (I cast mine in bent tubing) in the
plenum body void and then pour in the polyurethane - it hardens in about
15 minute or less. you pull out the silicone rubber cores and I use a hole
saw to cut through from the TB mounting surface to the tunnels left by the
silicone cores, a few inserts to take the bolt loads and I'm
done. """ --
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