REFLECTOR: Top NACA scoop VG location

[Mark Magee]

Bob,
Great pics. Thanks for posting as I wasn't clear in my mind where to apply my VG's.

Mark B. Magee
Sent from IPhone 4

On Nov 19, 2011, at 8:22 PM, "Bob Jackson \(Jax Tech\)" <bobj at jaxtechllc.com> wrote:

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> Kevin,
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> I don't remember getting much guidance on placing our VGs for the inlet scoops, but they do seem to lower our CHTs up to 10 degrees.  Hopefully, you can get a good idea from proportioning things from the photos -- I don't have any exact measurements.  We used two rows because we definitely see higher CHTs in the climb with lower climb airspeeds, so I'm assuming the air on the top of the fuselage is separating earlier than where we put our original set of VGs.  I would say our farthest set is about at the 18" mark that Scott mentioned.
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> Bob Jackson
> Turbo IO-500N
> N2XF
>  
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Scott Derrick
> Sent: Saturday, November 19, 2011 10:04 AM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Top NACA scoop VG location
>  
> I have been told that ideally its about 12 to 18 inches.  Mine are about 6 inches which did improve the cooling but I didn't, see the numbers that others have reported.
>  
> Now that its winter when running lop i'm running a bit too cold!
>  
> Kevin Baker <flykb at verizon.net> wrote:
>  
> >Hi All
> >What is the exact location and angle of the Vg for the naca scoops.
> > 
> >Example 3" in front of the front of the the naca scoope 1" left and right from midline of the scoope at an angle of 20deg rt and 20deg left from midline of the scoop
> > 
> >Thanks
> >Kevin
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