An update today; had an evening free to ponder.
The 181 model received a reverse naca vent beginning aft of the door frames and
ending just forward of the fuel vents.
A free stream solution was dialed in for 100kt with a level attitude.
The results were pleasing. The exit vent caused the forward side vents to flow
a great deal more volume into the cabin. So the reverse naca vent works. It just
may not be located at the ideal position as it's trade off is additional Drag
and some acoustic related energy.
Porting through the D panel produced no benefits worth mentioning.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=511334#511334
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