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Vortex Generators/Turbulator's

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clint_bazzill(at)hotmail.
Guest

Posted: Thu Sep 06, 2007 7:11 am Post subject: Vortex Generators/Turbulator's

My tests are complete on Harrison Designs Vortex Generators.



I had approval from FAA to test these generators and am wrting up my results 

on Kitfox Model IV-1200.  I revisited early flight tests and did a complete 

calibration of system.  Had a chase plane follow and video tape tuffed wing 

prior to installation.   I  am in the precess of writing up a 3 part series 

on procedures and results.  Stay tunned in  Clint Kitfox IV-1200 912ULS  

1250 Hours.



_________________________________________________________________

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dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Thu Sep 06, 2007 7:41 am Post subject: Re: Vortex Generators/Turbulator's

Clint  good stuff,  I have several sets of Vgs here and am contemplating doing mine soon.  My IV  flies great but I have just gotta know .....

I have harrison VGs as well as stol speed ones.

I did use VGs on a lower cowl redesign and they contributed to a 20 F drop in water temps .

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Fox5flyer
Guest

Posted: Thu Sep 06, 2007 8:24 am Post subject: Vortex Generators/Turbulator's

That is definitely good news Clint.  Please keep us in the loop.

Deke

do not archive



---

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Fri Sep 14, 2007 5:15 am Post subject: Re: Vortex Generators/Turbulator's

Clint, 



I used some harrison Vg;s on the lower cowl mods i did and they contributed to a 20F drop in coolant temps 

http://www.cfisher.com/cowl.html



Last weekend I put some Vgs on my wings.

I have started a page here   http://www.cfisher.com/vg.html

I put up a video of some flying with them on to be found there as well.

I placed  the leading edge of VGs    4.625 inches back from leading edge as measured through the chord not following the curvature of the top of the wing.  This puts the centre of the VG at exactly 10%  of the chord. 



So far favorable results, but nothing like I have read about the 8 mph stall speed drops.   Looks like about 2 mph drop in stall to  about 36-37 mph clean. No speed loss and if any less than 1 mph but no gain either. 



Slow speed flight  does seem a little more stable  but I have never complained or had any issues with slow speed flight on my IV.  I have been reluctant to put on the VGs as the Kitfox of mine has had such good performance. 



I did do another mod that has added favorable results this week as week which was correcting the exhaust form how Skystar had cut the 90% elbow and shortened the actual header length. If definitely has added HP as RPM has increased at idle, static and wide open throttle in flight by 200 to 300 rpm .   I have now re pitched and picked up some speed as well but will post data once done another re pitch and some more flight data.

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Fri Sep 14, 2007 6:32 am Post subject: Vortex Generators/Turbulator's

Glad to see you're back to the list.



Do you think the VGs on the lip of the cowl will help cooling without the

radiator scoop?



Noel



[quote] --

_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Fri Sep 14, 2007 6:32 am Post subject: Vortex Generators/Turbulator's

Dave can we see a straight down view of the installation showing the spacing

and angles between individual VGs?



Liked the video!...  Beats the tar out of Flight Sim but the plane seems

strangely familiar.



Noel



[quote] --

_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Fri Sep 14, 2007 6:51 am Post subject: Re: Vortex Generators/Turbulator's

Noel, 



I am not sure but I think the rad scoop does help with cooling.

The same setup  without the scoop? should be ok  but i will have to remove to validate for sure. 



 	  Quote: 	
		  Do you think the VGs on the lip of the cowl will help cooling without the 

radiator scoop? 



Noel

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Fri Sep 14, 2007 7:15 am Post subject: Re: Vortex Generators/Turbulator's

Noel, I cannot help you with a pic other than  at   http://www.cfisher.com/vg.html  but you can see how the spacing changes



But I followed these directions  http://stolspeed.com/content.php?id=27

from last outer rib for a about 3 feet  60mm  spacing 

Then rest of wing to windshield  I spaced them  90 mm 



 	  Quote: 	
		  Dave can we see a straight down view of the installation showing the spacing 

and angles between individual VGs?

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Fri Sep 14, 2007 12:59 pm Post subject: Vortex Generators/Turbulator's

As you know I don't have a scoop on my plane...  Then again I haven't had

any cooling issues either.  I'm just trying to keep options open.  Is it

advisable to use the same rad for the 912 that I am using with the 582?

Noel



[quote] --

_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Fri Sep 14, 2007 1:51 pm Post subject: Re: Vortex Generators/Turbulator's

Noel, I think the rad is the same one -- 4" x 20 " approx. but surely someone will comment for sure to confirm.

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Fri Sep 14, 2007 2:49 pm Post subject: Vortex Generators/Turbulator's

Found what I needed on the link you provided...  Thanks



 

[img]cid:899513722(at)14092007-2DB8[/img]  

 Noel Loveys, RPP, AME intern

 Campbellton, Newfoundland, 

 Canada

 Kitfox Mod III-A, 582, B box, Ivo IFA

 Aerocet 1100s

 noelloveys(at)yahoo.ca (noelloveys(at)yahoo.ca)

 

 

 Do not archive

 

 

 



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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Mon Sep 17, 2007 4:07 am Post subject: Re: Vortex Generators/Turbulator's

Update on VG testing .........



just in from more aggressive stall testing. 



power off -- full aft stick - just get a 500 fpm mush with less buffet that without VGs and no nose drop. 



power on --  3 stalls - one right wing dropped  other 2 no wing drop .

still less buffeting that before .



So far, satisfied with VGs and no cruise speed loss it seems. as far as claims of  these 8 + mph  stall speed drops -- in my case that just a myth so far but 2 or 3 mph about the most of got  SO FAR . 

http://www.cfisher.com/vg.html

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Wed Sep 19, 2007 5:48 am Post subject: Re: Vortex Generators/Turbulator's

one more attribute on the Vg's that I failed to mention originally was a greater AOA on climb out was evident.

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Fri Nov 09, 2007 8:11 pm Post subject: Re: Vortex Generators/Turbulator's - Clint

Hi  CLint,  I am still anxious to read your report on Vgs.  Where can I expect to read it ? 



 	  Quote: 	
		  Posted: Thu Sep 06, 2007 11:11 am    Post subject: Vortex Generators/Turbulator's   



--------------------------------------------------------------------------------

 

My tests are complete on Harrison Designs Vortex Generators. 



I had approval from FAA to test these generators and am wrting up my results 

on Kitfox Model IV-1200. I revisited early flight tests and did a complete 

calibration of system. Had a chase plane follow and video tape tuffed wing 

prior to installation. I am in the precess of writing up a 3 part series 

on procedures and results. Stay tunned in Clint Kitfox IV-1200 912ULS 

1250 Hours.

clint_bazzill(at)hotmail.
Guest

Posted: Sat Nov 10, 2007 9:09 pm Post subject: Vortex Generators/Turbulator's

Juat got back from a trip to Israel and put together a video that has taken most of my time.  Alao am working on house design in airpark.  Haven't forgotten and will get it out.  Clint

 



 	  Quote: 	
		   Subject: Re: Vortex Generators/Turbulator's

 From: dave(at)cfisher.com

 Date: Fri, 9 Nov 2007 20:11:55 -0800

 To: kitfox-list(at)matronics.com

 

 --> Kitfox-List message posted by: "dave" <dave(at)cfisher.com>

 

 Hi CLint, I am still anxious to read your report on Vgs. Where can I expect to read it ? 

 

 

 > Posted: Thu Sep 06, 2007 11:11 am Post subject: Vortex Generators/Turbulator's 

 > 

 > --------------------------------------------------------------------------------

 > 

 > My tests are complete on Harrison Designs Vortex Generators. 

 > 

 > I had approval from FAA to test these generators and am wrting up my results 

 > on Kitfox Model IV-1200. I revisited early flight tests and did a complete 

 > calibration of system. Had a chase plane follow and video tape tuffed wing 

 > prior to installation. I am in the precess of writing up a 3 part series 

 > on procedures and results. Stay tunned in Clint Kitfox IV-1200 912ULS 

 > 1250 Hours. 

 > 

 > 

 

 

 --------

 Rotax Dealer, Ontario Canada

 Flying Videos and Kitfox Info

 http://www.cfisher.com/

 

 

 

 

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