REFLECTOR: NACA scoop

[Andy Millin]

Hey Dave,

The simple answer to making my own is ... because I could. :)

I image the factory scoop would work just fine.  The factory scoop is
naca-esque.  I wanted a true NACA, and I could.

NACA inlets work best when placed in areas with a thin boundary layer.  For
our purposes, anywhere in the nose area should work pretty well.  At this
point your placement decision will be more aesthetics.  I'll bet that if the
nose of the inlet is within a couple feet of the nose, you'll get plenty of
fresh air.  With this placement I doubt you will need VG's.

I used a simple saber saw to make my fuselage cuts.  Always cutting 1/8"
inside the lines and filing the hole to the correct size.  File and fit
(repeat ... and then repeat some more)  (big grin)

Fly you plane up to Michigan, give me a ride, and I'll install it for you!
;)

Best regards,

Andy




-----Original Message-----
From: Dave Philipsen [mailto:velocity at davebiz.com] 
Sent: Monday, September 11, 2006 8:37 PM
To: amillin at sbcglobal.net; Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: NACA scoop

Hi Andy,

Why did you decide to make your own instead of the factory one?  
Currently, the oil cooler
inlet on the belly is a NACA scoop.  So, I suppose it would be better for me
to locate one for cabin cooling on the side, eh?  Since I'm an owner and not
a builder, I'm looking for ideas...how to orient the scoop to work best, how
large to make the scoop, what kind of saw to cut the scoop with, whether VGs
ahead of the scoop would be beneficial, etc.

Andy Millin wrote:
> I made my own NACA.  I still have the factory provided inlet molded part.
> If you want it, it's yours.
>
> Andy
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] 
> On Behalf Of Rene Dugas
> Sent: Monday, September 11, 2006 10:28 AM
> To: velocity at davebiz.com; 'Velocity Aircraft Owners and Builders list'
> Subject: Re: REFLECTOR: NACA scoop
>
> I recommend smaller than the factory NACA and a large 3" nozzle inside.
> The NACA could also be placed on the belly of the nose on a FG.
> Rene'
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] 
> On Behalf Of Dave Philipsen
> Sent: Sunday, September 10, 2006 9:51 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: REFLECTOR: NACA scoop
>
> I've got about 12-15 hours now on my newly acquired STD FG and one 
> problem I'm noticing is that I don't have very good ventilation in the 
> cabin.  The guy who built it used a 1-1/2 inch hose collecting air 
> coming into the oil cooler chamber.  Even on 75-80 degree days it gets
pretty stuffy in there.
> It seems like I've seen some builders use a NACA scoop on the side 
> near the front.  Is that normally used for ventilation?  If so, how 
> big of a scoop would I want to use?  Any suggestions/ideas?
>  
>
> --
> Dave Philipsen
> STDFG
> N171SP
>
>
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>   

--
Dave Philipsen
STDFG
N171SP