REFLECTOR: XLFG Intake Air

[Mark Magee]

Rene, Et al,
Thanks for the input. I live in Central Texas in a now 3 year drought.
Lot's of silica airborne methinks...
I will try and keep my filtered ram-air and determine how difficult to
switch to a 'P51' style scoop. I have a buddy who built a Cozy 3 Lindbergh
award winner that has a NACA on the belly for cooling where he picks up
filtered ram air. I just wonder the specific difference at say 10,000 FT
MSL the MP difference between similar sized (inlet size) NACA scoops vs P51?

Thanks
Mark

On Thu, Mar 21, 2013 at 2:54 PM, David Rene Dugas <renedugas at gmail.com>wrote:

> I think a filter is good. Like Scott I don't like even the thought of
> sand/dust in and machinery much less something that can kill me. When I
> clean my K&n filter I never see much detritus but I know it's there. My 2
> cents. My engine is too expensive to dust. 😎
>
> Rene' Dugas
> Sent from an Apple.
>
> On Mar 20, 2013, at 10:12 PM, Mark Magee <edjonesbrady at gmail.com> wrote:
>
> > All,
> > My XLFG was built with a NACA scoop where the bottom engine cowl marries
> to the fuselage for ram intake air. As I am nearing painting, and did not
> build this into the bird, the PO did, I'm considering eliminating the
> filtered lower NACA ram-air configuration for scat tubing to a cooling air
> NACA scoop topside for simplicity. As well the NACA down low where it is
> does catch considerable FOD from the nosewheel, yet is filtered.
> > I know some folks are running straight unfiltered from a scat tubing
> routing from an upper engine cooling NACA with no alternate air. Any
> feedback from the group on how well this is working? If I were to make this
> change I fear I might lose a slight loss of manifold pressure, but for the
> simplicity would be better off overall. The sealing on the airbox to the
> lower cowl is problematic.
> > Thanks in advance for the feedback.
> > Mark Magee N34XL XLFG
> >
> > <N34XL Lower NACA intake.JPG>
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