REFLECTOR: NACA Outlet

[John Dibble]

My SERG was built with the bottom outlet flush with the fuselage.  I had siginificant
cooling problems during climb.  I extended the outlet 3 1/2" (rear facing) and that
greatly improved cooling during climb.  My cruise speed was not affected.  I wonder
why the exit isn't at the top of the fuselage?  Seems like the pressure would be
lowest there.

John

Jack Prock wrote:

> I know a NACA scoop inlet is the best for least resistance for an inlet, I
> am wondering what the best way
> is to have an outlet. I am building the oil cooler in the nose and making
> the outlet on the bottom of the fuselage.
> Is there a NACA outlet? Is it best to just have a rear facing pipe? Or a
> hole in the fuselage that air get pumped out?
> Does it matter? I would think that any air flow perturbations would cause
> drag? Anyone have any thoughts on this?
>
> Jack Prock
>
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