REFLECTOR: VG for naca scoop.

[Jim & Sharon Beck]

Kurt.
Fallon is 4000 ft and temps in the summer go over 100 so we try to leave early. So far  I have placed 6 sets of vgs on each wing starting at the outboard end . I flew this weekend early with the temp about 35 degrees and it did seem to jump off the ground when it did leave but not much less runway than before. just a more positive climb. stall speed not really effected. will try the rest of the wings next and maybe a half set on the canard. My wings were made by Alan Shaw and I was told they are a bit heavy. my empty wt is 1520.
Will let you know what happens after the next changes.
Jim
  ----- Original Message ----- 
  From: NMFlyer1 at aol.com 
  To: reflector at tvbf.org 
  Sent: Thursday, March 20, 2008 10:44 AM
  Subject: Re: REFLECTOR: VG for naca scoop.


  Jim, 

  I would be interested in knowing the results of your tests. Those numbers are the reason I chose to change power plants on my 173 Elite. My airpark is at 5000' and temps are routinely 90 in the summer. Can you imagine what that would do to your takeoff roll? I have to fly to Gunnison Colorado every other week and the 

  I have 1/2 lower winglets on mine, and kept the elevator cuffs off . I have purchased a set of VG's but hadn't planned on putting them on right away. I would rather keep the wing & canard nice and clean if the performance is acceptable. I plan on seeing how the thing performs with 340 HP (700'/lbs. of torque at the prop) and a 76" 3-blade constant speed. 

  I used NACA scoops for my cooling too and plan on using VG's on them if needed. 

  Did you build your own wings & canard, or did you have them built?  


  Thanks for your info.   Kurt 





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