REFLECTOR: NACA scoop

[Andy Millin]

I agree Brian.  NACA's are easy to make.

Vlad's spreadsheet is good, but it doesn't calculate the lip.

http://www.tvbf.org/docs/NACA%20Submerged%20Inlets.xls

Andy

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of michalk
Sent: Tuesday, September 12, 2006 9:30 AM
To: amillin at sbcglobal.net; Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: NACA scoop

NACA's are easy.  I made my own from Vlad's Excel calculator.
Download it here: http://www.tvbf.org/docs/nacascoop1.1.xls
Other good NACA stuff there as well
http://www.tvbf.org/docs/


Andy Millin wrote:
> 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
> 
> 
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