Bill,

I was too worn out yesterday to complete some details on how the E-racer
solved his lack of vent air problem.  One was to introduce air exits in his
aft cabin to let incoming air out.  Although this was an improvement, his
additional problem was that the intake NACA was located in an area of dead
air.  By placing 2 small vortex generators ahead of the NACA, the air flow
was dramatically increased.  

Again, a Lancair should allow for adequate air exit thru the tunnel and
elevator openings unless there is too much air coming in under the seats from
the gear doors and too much leakage in the canopy seals.  Perhaps some
tufting to see what is going on with the air ahead of the NACA and maybe even
using relatively small vortex generators might make the difference.  If you
are in an experimentation mode, and you have an "alternate static air" valve
using cockpit air, you may want to open it at high and low speed flight
(including gear down) and calculate the pressure differences from the change
in indicated altitude.

Scott Krueger
N92EX