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RE: Misc Questions ??

Subject: RE: Misc Questions ??
From: David Glauser <dg@xpsystems.com>
Date: Tue, 9 Feb 1999 09:09:47

John Moran wrote:
> 1) I am considering small NACA extractor vents - perhaps 2 inches wide
- under
> the seats. These would vent the cockpit somewhat - airflow would be
impeded by
> having to travel around the blue foam and cushions - and also provide
a drain
> in case of a fuel leak from a filter as re-located under the seat. Is
this
> location reasonable or would it affect structural strength unduly?

I would expect these to have the opposite effect - under the
fuselage/wings is
an area of high pressure, which would reverse the air flow. I believe
some
posters to this list have mentioned that air forced up into the tunnel
comes into the cockpit through the slots cut for the landing gear and/or

throttle. In some cases pilots have reported exhaust smell when flying
at higher angles of attack.

David


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John Moran wrote:

 1) I am considering small NACA extractor vents - perhaps 2 inches wide - under

 the seats. These would vent the cockpit somewhat - airflow would be impeded by

 having to travel around the blue foam and cushions - and also provide a drain

 in case of a fuel leak from a filter as re-located under the seat. Is this

 location reasonable or would it affect structural strength unduly?


I would expect these to have the opposite effect - under the fuselage/wings is

an area of high pressure, which would reverse the air flow. I believe some

posters to this list have mentioned that air forced up into the tunnel

comes into the cockpit through the slots cut for the landing gear and/or 

throttle. In some cases pilots have reported exhaust smell when flying

at higher angles of attack.


David



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