Scott, I used one large valve up under the panel which does not blow directly on me but dumps a lot of air in the forward cockpit. The rear seat does have a conventional airline ball vent.
If you look close, at least one of RV-8s the Showplanes crew built in-house includes vent outlets cut into the triangular panel braces. They have valves upstream, hidden behind the panel. Nice trick, but the valves they used are leakers and I wanted positive shutoff. The idea just needs better valves.
__________________
Dan Horton
RV-8 SS
Barrett IO-390
|