I purchased some material used by the council buses to fire protect and
reduce noise, it was a reasonably thick 3/16" woven material. Not sure what it
was! I put it under the hood of my old Landcruiser as the paint was burning off.
I knew it would get pretty dirty under there so I got a tube of silicon and
spread it over the entire surface front and back and tried to force it into the
weave material as much as possible. This protected the material from dirt and
moisture ( weight) and helped with the heat protection - I stuck it on with the
same silicon.
What's not to like? This is easy on straight sections but not so where
the pipe curves. Would be really tough to shield my exhaust like this. I
havent tested anything like this but suspect that it is not as effective an
insulator as the wrap or some other sort of barrier (like the Zetex or
Fiberfrax).
My exhaust is made of .060 mandrel bent 321 stainless and coated in and
out with a 2000 degree ceramic coating. So not sure how relavent the
comparisons to wrapped mild steel are. I agree with the inspection related
comments. But would like to hear from anyone who has used the tape in an
aircraft install where the high heat is constant, on a comparable exhaust
(i.e. 321 stainless).
The real issue here is my cowl is close. And after all the work to make
it the prospect of burning it up isnt an option. Lesson learned is to make
sure ALL engine work including fabrication of exhaust is complete before
making a cowl. But that ship has sailed so now I'm looking at ways to recover.
The simple shields that Lynn proposed will leave too many gaps and too much
potential for cooking the cowl.
The Zetex looks like a possible answer if I can find a source other than
the manufacturer that has small quantities available.
Anybody have any experience with Fiberfrax (Aircraft Spruce sells it;
claims its good to 2200 degrees)?
Mike
----- Original Message -----
Sent: Wednesday, March 05, 2008 1:45
PM
Subject: [FlyRotary] Re: Exhaust Wrap
was [FlyRotary] Re: Exhaust?
I think that's what the Doctor ordered, Lynn
Simple, effective, light weight, permits inspection,
relatively inexpensive, can be easily removed, does not cause deterioration
of the tubing, can be done in home work shop.
What's not to like {:>)
Ed
----- Original Message -----
Sent: Wednesday, March 05, 2008 3:20
PM
Subject: [FlyRotary] Re: Exhaust Wrap
was [FlyRotary] Re: Exhaust?
OK, How about this.
A shield in .015" stainless. The tabs can be bent inboard to take up
less space. The air gap can be as little as 1/2". Only needed on the side
where some protection is required. Very light. Can be wired on instead of
hose clamps. Removable for tubing inspection.
Lynn E. Hanover
In a message dated 3/5/2008 11:06:41 A.M. Eastern Standard Time,
eanderson@carolina.rr.com writes:
I just do not think any sort of exhaust wrap belongs
in an aircraft. It might work just fine - but, if it does
not........., ..but, just my opinion.
Ed
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