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Bill, I have 2 tight 90 degree turns that I cut out of a SS
donut. For the short term, like until next January, I could use some
temporary protection. I looked at the Power Sport installation two years
back and they used a complete shield on the exhaust pipe and it will take a lot
of time to fabricate. Was hoping to fly soon and finish the detail things
next winter when the snow gets deep. JohnD
----- Original Message -----
Sent: Thursday, September 27, 2007 12:29
AM
Subject: [FlyRotary] Re: cowling
protection
What is the rule of thumb for the heat shield
between the exhaust pipe and the cowling. I have fiberfrax to
glue on and planned on covering it with .016 SS, the pipe is 2 1/2 SS, do I
need a shield 5 inches wide? Thankyou
JohnD
John, insulation is a good idea but the best way to prevent radiated heat
is to use a heat sheld. The more space you can give it (on BOTH sides) the
better. Feeding a small air bleed in the area to cary off the heat is also a
good idea. The air bleed doesn't have to be big, it just has to keep the air
moving.
Bill Jepson
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