Today's Message Index:
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1. 11:08 AM - Seals (BobbyPaulk@comcast.net)
2. 11:39 AM - Re: Seals (Mark Hubelbank)
Message 1
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List
Thanks to all who replied about the firewall seals. I have also added an exhaust
extension after a severe encounter with Carbon Monoxide. I hope the attached
photo is viewable. While circling a friends house in a steep bank and high angle
of attack my CO indicator ( installed just the day before ) turned black.
I had a serious headache for the next 2 ~ 3 hrs. I now believe some of the fumes
are entering thru the belly access door though I get the smell on the ground
as well but not as bad. I am planning on sealing the belly access and the canopy
rails as well. The opening between the canopy and fuselage rail is about
1/8" but the vacuum will pull a shirt sleeve out if you get to close. I believe
the domed canopy puts a very negative pressure in the cockpit thus pulling in
whatever gases that may be close to the fuselage.
Still experimenting.
Bobby
112 Hrs
DO NOT ARCHIVE
Message 2
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Bobby,
For what it is worth, I also has some shirt sleeve tugging and put
a strip of thick 3M weather stripping foam around the whole canopy
including gaps near the front. It also helps to warm the cabin in the
winter.
CO is nasty stuff. Hard to deal with. Even my previous plane a,
PA24-260, had some problems with fumes being sucked in through rear
vents. There nothing was defective, just a problem if you has the right
combination of vents open at the right attitude. Nothing in the POH.
On 12/07/2010 2:03 PM, BobbyPaulk@comcast.net wrote:
> List
> Thanks to all who replied about the firewall seals. I have also added
> an exhaust extension after a severe encounter with Carbon Monoxide. I
> hope the attached photo is viewable. While circling a friends house in
> a steep bank and high angle of attack my CO indicator ( installed just
> the day before ) turned black. I had a serious headache for the next 2
> ~ 3 hrs. I now believe some of the fumes are entering thru the belly
> access door though I get the smell on the ground as well but not as
> bad. I am planning on sealing the belly access and the canopy rails as
> well. The opening between the canopy and fuselage rail is about 1/8"
> but the vacuum will pull a shirt sleeve out if you get to close. I
> believe the domed canopy puts a very negative pressure in the cockpit
> thus pulling in whatever gases that may be close to the fuselage.
> Still experimenting.
>
> Bobby
> 112 Hrs
>
> DO NOT ARCHIVE
--
Mark Hubelbank
NorthEast Monitoring
2 Clock Tower Place
Suite 555
Maynard, MA, 01754 - USA
mhubel@nemon.com
978-443-3955
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