Karel,
No, I have not measured the pressure, I relied on what EA2004 said also
about the pressure in this area. I think they were correct, because the air
speed over the top is higher than the airplane's speed through the ambient
air and hence the pressure is lower than the ambient pressure (compare the
fuselage profile to a wing profile - higher speed hence lower pressure on
top of the wing).
All I can say for sure is that the pressure at my vent outlet is lower than
in the cockpit, because air goes out through that vent (I can feel the air
flow by holding my hand under the outlet opening). The air pressure in the
cockpit may be higher than ambient, though, because of the efficient NACA
intakes on both sides (built as per Europa standard). If air comes in
through your vent, it must mean that your cocpit pressure is lower than at
your top vent opening. Where does this air leave your cockpit?
Svein
----- Original Message -----
From: "karelvranken" <karelvranken@hotmail.com>
Sent: Thursday, September 11, 2008 9:11 PM
Subject: Re: Europa-List: Cabin vent - air outlet?
> <karelvranken@hotmail.com>
>
> Svein,
> You say the area where you placed the outlet is a low pressure area. Are
> you sure? Did you measure that pressure? I think when the profile is
> diminishing the pressure raises. On that place I have an intake for
> ventilation and even in hot days I can't open fully the inlet because the
> windstream can't be endured for a long time.
> Regards,
> Karel Vranken. F-PKRL
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