The fresh air ventilation on our 320 has always
been adequate at high airspeeds. I have the standard naca ducts attached to
eyeball outlets on the panel. At lower speeds however (below about 120
knots) it has never performed well. The other day at about 100 knots, I put my
hand over the eyeball duct to see if any air at all was coming out and found
that...you guessed it...it was actually sucking air out of the cabin. Has anyone
else experienced this? Any ideas on how to improve flow at low
speeds?
Thanks for any input.
Bill