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Bill,
When the canopy is open and the aircraft is positioned so the sun
is at the rear of the plane then the reflection angle off the underside of
the canopy glass focuses like a magnifying glass to the panel dust cover
and will burn pin holes or a spot about the size of a BB. The cover
material will melt in an area about the size of a pencil eraser. It only
takes about 30 seconds to happen.
I have never had (yet) it burn completely through the "Finesse"
(Ultra-leather) to the thin foam underlayment or to the fiberglass cover
itself. Maybe someone else can speak of worse damage than I.
Closing the canopy about half way prevents this occurrence from
happening. Or not having the canopy open when the sun is behind the plane,
even if the sun is high in the sky, will prevent the damage.
It only occurs when the canopy is open and the sun is behind, or nearly so,
the plane. I have a cut to shape piece 1/4" bubble silver sided heat
barrier from Ace Hardware that I carry rolled up in the baggage
compartment to unroll and put over the dust cover if I am going to have the
canopy open for any length of time, like at a fly-in or airport gathering.
Or I park the plane facing south.
Gary Edwards
LNC2
----- Original Message -----
Sent: Thursday, March 03, 2011 12:37
PM
Subject: [LML] Re: Burned dust cover
looking for material that wontburn.
What is the scenario
that causes the dust cover to burn? Why is it only the dust cover?
What are the sun angles, canopy angles, etc that causes this to happen?
What prevents the dust cover from catching on fire and burning the plane to
the ground?
I understand that
this phenomenon happens, but I don't understand anything else about it.
Can someone please explain?
Bill
B
From: Lancair
Mailing List [mailto:lml@lancaironline.net] On Behalf Of randy snarr
Sent: Wednesday, March 02, 2011 9:32
PM
To:
lml@lancaironline.net
Subject: [LML] Re: Burned dust cover
looking for material that wontburn.
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Gary,
I
thought of that too.
Anything but black reflects in the window.
Colors to varying degrees but foil is too much..
Carbon fiber is
the stuff. I have tested it and it will not burn or make a mark.
I am
planning to make some patches for the sides of the dust cover like the
elbows on a sport jacket. I plan to glue them down with spray adhesive.
I just need a good way to finish the edges so it has a nice clean
look.
My dust cover is flat black so black carbon fiber may by my
answer.
Still working on a solution to make it permanent...
I will
post what I end up doing..
Randy
Snarr
235-320
N694RS
"Flight by machines heavier than air is
unpractical and insignificant, if not utterly
impossible"
-Simon Newcomb, 1902
--- On Wed, 3/2/11, Gary Edwards <gary21sn@hotmail.com>
wrote:
From: Gary
Edwards <gary21sn@hotmail.com>
Subject: [LML] Re: Burned dust
cover looking for material that wontburn.
To:
lml@lancaironline.net
Date: Wednesday, March 2, 2011, 5:58
AM
How about
using a patch of Zetex in the areas prone to
burning?
-----
Original Message -----
Sent: Tuesday,
March 01, 2011 12:19 PM
Subject: [LML] Re:
Burned dust cover looking for material that
wontburn.
I have
tried to do the same. I really would like a better solution though.
Sooner or later it is going to happen again. i just picked up some
cloth material that will not burn. I will post my findings to the
group if it works. Randy Snarr
Sent via
BlackBerry from T-Mobile
From:
"Gary
Edwards" <gary21sn@hotmail.com>
Sender:
"Lancair
Mailing List" <lml@lancaironline.net>
Date:
Fri, 25
Feb 2011 09:50:35 -0500
To:
<lml@lancaironline.net>
ReplyTo:
"Lancair
Mailing List" <lml@lancaironline.net>
Subject:
[LML] Re:
Burned dust cover looking for material that wont
burn.
My second
re-covering of the glare shield lasted about 48 hours without a burn
mark. Got distracted when a TV camera crew walked up with the
camera rolling (my 15 minutes of fame). So, I said, "screw
this". I put an EAA sticker over the burn marks. It's been
there for 9 years. I try to not park with the sun behind
the plane and try to keep the canopy closed. A bit difficult
when I pull the plane out of the hanger and it's facing north for
taxi.
-----
Original Message -----
Sent: Thursday,
February 24, 2011 8:13 AM
Subject: [LML]
Burned dust cover looking for material that wont
burn.
|
Everyone
has seen the burn marks on your dust cover over the instrument
panel from the canopy glass caused by the sun when it hits at
the right angle.
Mine was really nice. It was covered in a
sinthetic black leather. Anyway, I have already recovered it
once and tried to be really careful with it. In short, it has
about 20 or so burn marks in it in 2 years.
I am
looking for a black material (or could be painted black) that
will not burn that is thin that two 8" patches could be made
to protect the sides of the glare shield where the sun is
hitting it.
Basically I would use an adhesive to glue down
these patches where the sun hits to stop the burn
holes...
Any ideas?
Randy
Snarr
N694RS
235/320
"Flight by machines heavier than
air is unpractical and insignificant, if not utterly
impossible"
-Simon Newcomb,
1902
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