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slyck(at)frontiernet.net
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 Posted: Mon Oct 26, 2009 5:52 pm Post subject: fumes |
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Kolbers, has anyone experienced engine by-product smell, especially
in a MkIII?
This fall, after a nearly two hour flight, I noticed that my
respiratory system had retained what
smelled like an old oil sump. I don't see any visible evidence or
unusual oil consumption.
Thinking it may have been the location of my vent exit I rerouted it
to the aft of the engine near
a back mount. It was previously behind the top mounted radiator with
possible
migration down through the center section. I flew it for a short ride
this evening but not
long enough for any conclusive revelations.
There is the possibility of airflow reversal during taxi.
It gets parked for the winter tomorrow (short hop to a freebie steel
barn)
????
BB
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Tue Oct 27, 2009 3:37 am Post subject: fumes |
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Bob, Sounds like an "I changed something and got an unexpected result" scenario. Sure fire way to find out is to put the vent back where it was and see if the problem goes away. Given the poor aerodynamics of the Mk III pod, no firewall, no cowling, and very little engine compartment / cockpit segregation pretty much anything is possible.
Rick Girard
do not archive
On Mon, Oct 26, 2009 at 8:49 PM, robert bean <slyck(at)frontiernet.net (slyck(at)frontiernet.net)> wrote:
[quote]--> Kolb-List message posted by: robert bean <slyck(at)frontiernet.net (slyck(at)frontiernet.net)>
Kolbers, has anyone experienced engine by-product smell, especially in a MkIII?
This fall, after a nearly two hour flight, I noticed that my respiratory system had retained what
smelled like an old oil sump. I don't see any visible evidence or unusual oil consumption.
Thinking it may have been the location of my vent exit I rerouted it to the aft of the engine near
a back mount. It was previously behind the top mounted radiator with possible
migration down through the center section. I flew it for a short ride this evening but not
long enough for any conclusive revelations.
There is the possibility of airflow reversal during taxi.
It gets parked for the winter tomorrow (short hop to a freebie steel barn)
????
BB
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zeprep251(at)aol.com
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| Posted: Tue Oct 27, 2009 5:53 pm Post subject: fumes |
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Robert,
You can feel the air flow coming back up the fuselage tube like some one with a leaf blower at the aft end.If you moved the vent close to the fuselage the fumes will end up in the cabin.I had to make a 4" thick foam plug with slots cut for the cables placed just ahead of the elevator and rudder balcranks at the rear of the fuselage tube.Made it about an inch larger than the tube diameter.Just made a cut for the cables at the 10,12,2 and 6 o'clock positions.When I changed the exhaust system ,it let me know in a hurry.
G.Aman
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