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VG placement

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wcm(at)tampabay.rr.com
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Posted: Wed Feb 08, 2006 2:13 pm Post subject: VG placement

All,



I really hate to beat a dead horse here but with regard to the Landshorter 

VG's their (Landshorter's) formula calls for installing the VG's at 10% of 

the wing chord, which on a FSII would be about 5.6 inches aft of the center 

of the leading edge. The spacing between the VGs is recommended to be 1% of 

the total wing span (in inches) minus approximately 3' for the cabin area 

which for the sake of argument works out to be roughly 3".



My question is : where or on what do you center one pair of VGs? On, the 

center of a rib? In the center of the valley? If a pair is centered at 

either place then an equal spacing of 3" between VGs cant be maintained (I 

assume that all the VG's not just pairs are the be spaced at an equal 

distance apart). Also would the VG's stop at the last outboard rib?



Any help would be very much appreciated.



Chris Mallory



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