REFLECTOR: VG for naca scoop.

[Jim & Sharon Beck]

Al. 
I break ground at 85 MPH and the Rpm Runs right up to 2550 when I add full throttle and then keeps moving right up to 2700 at about 65 mph. Acceleration seems pretty good up to 60 mph and then seems to slow getting up to 85. I can lift it off before 85 but will settle back in and run a bit longer on the wheels. 
thanks 
Jim

  ----- Original Message ----- 
  From: Al Gietzen 
  To: 'Velocity Aircraft Owners and Builders list' 
  Sent: Thursday, March 20, 2008 7:09 AM
  Subject: Re: REFLECTOR: VG for naca scoop.


  Jim;  

  Could this be more an issue of thrust than lift?  At what speed do you 'break ground'?  What is your static rpm? What rpm do you see during takeoff roll?



  -----Original Message-----
  From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Jim & Sharon Beck
  Sent: Wednesday, March 19, 2008 9:57 PM
  To: Velocity Aircraft Owners and Builders list
  Subject: Re: REFLECTOR: VG for naca scoop.



  Thanks for all your good information on the VGs placement and other good ideas. I've been working on shortening my takeoff roll on my 173 Elite RG with 200 hp Lyc and MT electric prop. 2 people & 40gal fuel take me about 2700 ft to break ground at our 4000 ft elevation here in the winter at 50 degree temps and fully loaded in the summer much longer. So far I've added the lower winglets and gained about 300 ft on takeoff roll and just put 6 pr of vg on the outboard main wings, about 1/2 of the full recommended set. Hope to test that when the wind quits blowing and then will possible ad the full set on the main wings. may skip the canard or just put a few on as I don't have trouble rotating, just getting the main wing to leave the ground. will try your suggestions on the oil cooler and also a naca for back seat ventilation that doesn't seem to have much air coming through.

  Thanks again

  Jim





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