charles.harbert wrote:

Paul, based upon the series of pictures I've seen, it appears that the air comes
into the oval chin scoop turns almost 180 degrees to pass thru the radiator
then over the engine (opposite to plane's direction) then turns again to go out
over the exhaust and exits thru the enlarged duct. Is this correct?

Yes it is.

If so, I now understand why they need to seal the cowl so tightly because any
inflow of air during flight would cause a reduction in flow over the engine and
thru the rad. It also might explain why they're having cooling problems (I'd bet
on the ground, too). They look like they have a huge radiator which should be
adequate for this much hp. How hot is their oil getting? The engine and exhaust
manifolds make a lot of heat which expands the air, plus you've got hot air
coming out of the rad. I had to install heat vents on the top of my cowl to
prevent it from softening the glass during long ground taxiing.

If I understand this correctly, they might be better off to route the inlet air
over the radiator and exit it out the back, rather than running it into the
engine compartment. They could then use the normal front cowl openings to cool
the engine and exhaust out the bottom with a much smaller opening. Just some
quick observations.

 
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