Today's Message Index:
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1. 07:13 AM - cowl heat protection (dlm)
2. 02:34 PM - Re: cowl heat protection (Patrick Thyssen)
Message 1
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| Subject: | cowl heat protection |
I used a silicon backed layer of fiberglass mat; after 1000 hr. it was OK;
no apparent delamination. From last June to April 2017, I found three areas
of delamination and had to replace multi layers both sides of the Nomex
core. Unfortunately last June, I let an FBO do some work and unknown to me,
the baffling was not correctly reinstalled and sealed; it is unknown
whether this contributed to the delamination. The cowl has been fixed
except for the new heat protection. What are other builders using? what are
your results? My plan now is to use the reflective aluminum adhesive back
material for the areas near (less than 3") the exhaust system. Selected
areas will also have Fiberfrax beneath the reflective foil. Per the heat
document from Vans, I will not be wrapping selected exhaust system areas,
although an IA friend says that turbine exhaust systems are routinely
wrapped. Any suggestions other than NEVER LET ANYONE ELSE TOUCH.
Message 2
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| Subject: | Re: cowl heat protection |
I have reflective aluminum on inside cowl, no problems just shy of 1000 hrs. I
did paint inside of cowling so it had a good base to adhere to.
Patrick Thyssen
Sent from my iPad
> On May 23, 2017, at 9:13 AM, dlm <dlm34077@gmail.com> wrote:
>
> I used a silicon backed layer of fiberglass mat; after 1000 hr. it was OK; no
apparent delamination. From last June to April 2017, I found three areas of delamination
and had to replace multi layers both sides of the Nomex core. Unfortunately
last June, I let an FBO do some work and unknown to me, the baffling
was not correctly reinstalled and sealed; it is unknown whether this contributed
to the delamination. The cowl has been fixed except for the new heat protection.
What are other builders using? what are your results? My plan now is to
use the reflective aluminum adhesive back material for the areas near (less than
3") the exhaust system. Selected areas will also have Fiberfrax beneath the
reflective foil. Per the heat document from Vans, I will not be wrapping selected
exhaust system areas, although an IA friend says that turbine exhaust systems
are routinely wrapped. Any suggestions other than NEVER LET ANYONE ELSE
TOUCH.
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