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VORTEX GENERATORS

 
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JetPilot



Joined: 10 Jan 2006
Posts: 1246

PostPosted: Fri Jan 13, 2006 7:35 pm    Post subject: VORTEX GENERATORS Reply with quote

I am building a Kolb MK-III Xtra and have been reading about vortex generators. People with the Firestars seem to like them, so im wondering if they are worth putting on the MK-III ? If anyone has done this I would like to konw how much they help the stall speed and slow speed flying qualities. People with firestars only report losing a couple MPH in cruise, but being that the MK III does 80 in cruise with a 912S I would think that the speed penalty might be greater on a faster airplane.

Michael A. Bigelow


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Larry Cottrell



Joined: 10 Jan 2006
Posts: 35
Location: Klamath Falls, Oregon

PostPosted: Fri Jan 13, 2006 9:48 pm    Post subject: Re: VORTEX GENERATORS Reply with quote

I also put them on a Mark III that I had for a while and they definately helped. I just sent a post about the placement on my firestar wing and (note that the word is singular, your experience may be different)I found this particular placement to give me the best benefit. That was 11 inches back on the full ribs, and the ones on the false ribs were set so that the back of the new ones were even with the front of the old ones. I did not in the interest of science do any further experimenting. My result was a stall of 26 MPH. Down from 36 MPH. I cannot tell you for sure what my original stall was since I put a static port in the bottom of my pod just under the rudder pedals. When I got the plane it was stalling at 46 MPH, but as I say I do not know how accurate that was.
Larry


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JetPilot



Joined: 10 Jan 2006
Posts: 1246

PostPosted: Sat Jan 14, 2006 4:11 pm    Post subject: Re: VORTEX GENERATORS Reply with quote

With all the people using vortex generators out there, I was hoping to get a little more information.

It seems that I definately want them, so what I need to know now is which ones are the best. I hear of kits, I see some people make thier own. I just dont know which design of vortex generator works the best.

Also, how many should I put on the wing, and what is the best location ?

Thanks,

Michael A. Bigelow


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Kolb MK-III Xtra, 912-S
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Mark



Joined: 13 Jan 2006
Posts: 5

PostPosted: Mon Jan 16, 2006 6:23 pm    Post subject: Re: VORTEX GENERATORS Reply with quote

Jet pilot,
Look up Possums on this site. I installed VGs on my Twinstar and the results are outstanding. I cut 80 of them from thin plastic,1" long,1/4" high. Found a template and installed them along the entire wing. Do it.


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Mark Shimei
Twinstar, 503
Phantom, Kawasaki 440
Weight shift Quick, Chrysler
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JetPilot



Joined: 10 Jan 2006
Posts: 1246

PostPosted: Mon Jan 16, 2006 6:33 pm    Post subject: Re: VORTEX GENERATORS Reply with quote

Mark wrote:
Jet pilot,
Look up Possums on this site.



I get like 1000 hits back when I search "possums", someone with that name posts a lot !!!

Mark wrote:


Weight shift Quick, Chrysler


Oh my gawd Shocked The weight shift quicksilver was my first solo !! I had one of those in high school. Do you still fly that ? Talk about a peice of history ! Tell me more about it Mr. Green

Michael A. Bigelow


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Kolb MK-III Xtra, 912-S
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