I recall seeing a note by Bob Berube, saying that he throws away these shro
uds, claiming that they are useless. I am not sure
I agree, so long as the air is directed into it, as with the Europa FWF kit
.
Karl<html><div></div>
From: ami@mcfadyean.freeserve.co.ukTo: europa-list@matronics.comSubject: Re
: Europa-List: High temperature fiberglassDate: Sun, 9 Mar 2008 10:30:46 +0
000
Aside from the exhausts, the hottest external part of a 912 is the cylinder
s (walls, not head), which are allowed a maximum temp of 190C.
There are a number of high temp epoxies available. Cheap and widely obtaina
ble is the Borden Chemical range, which has a Tg of 150C (following post cu
re).
I suspect that the epoxy in the Rotax hood is loaded with fire retardant (p
robably Antimony Trioxide), hence its opaque white colour. I've not otherwi
se found a high temp resin that is fire retardant, or a fire retardant epox
y (there are lots in use for marine applications, to keep the insurance com
panies happy) that has other than a low Tg. Still doesn't explain the extra
ordinary high cost of the Rotax cylinder hood.
Duncan McF.
> Date: Sat, 8 Mar 2008 20:05:11 -0600> From: paul.the.aviator@gmail.com> T
o: europa-list@matronics.com> Subject: Europa-List: High temperature fiberg
tor@gmail.com>> > Hi all,> > I was looking at a Rotax installation in a Dia
mond Kintana the other> day and I noticed that they have manufactured a fib
erglass plenum air> duct to drive the airflow over the cylinder heads and d
ownwards.> > Anyhow, I am curious about what type of fiberglass cloth and r
esin> system they use that could withstand the temperatures under the> cowl
ing. Does anyone have any idea ?> >=============
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