REFLECTOR: VGs for engine cooling NACA scoops

[Chuck Jensen]

The boundary layer my be pretty thick in that area on the fuselage and the taller VG may reach up through the boundary layer into the slip stream to get better turbulence and attachment.....makes sense, anyhow.

[Chuck Jensen] 
 -----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]On Behalf Of Chuck
Sent: Monday, March 09, 2009 1:58 PM
To: reflector at tvbf.org
Subject: Re: REFLECTOR: VGs for engine cooling NACA scoops



 
 
I still had some cooling problems after I installed the stock 3/8" VG's, so I upsized them by using 3/4" thin aluminum angle (Lowes or HD) that are 1 1/2" long in the same positions (using equivalent radius). Temps dropped about 15 degF. I know of another V that did the same and got same results. I also pop riveted them on.
 
Chuck
Std RG

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Here is a picture of the VG's from Brett Ferrell's Wike site

http://wiki.velocityxl.com/images/6/66/NACA_vg.jpg






 

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Douglas Holub
Sent: Sunday, March 08, 2009 6:44 PM
To: reflector at tvbf.org
Subject: REFLECTOR: VGs for engine cooling NACA scoops


Does someone have a picture or dimensions of the VG placement in front of the NACA scoops on top of the fuselage?
 
Doug Holub
Standard FG w/ electric nose lift
3 hrs down, 37 to go

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