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  #1  
Old 03-19-2018, 05:42 PM
Michaelpk3 Michaelpk3 is offline
 
Join Date: Dec 2016
Location: Sarasota, FL
Posts: 86
Default Micro VG installation

Thinking of pulling the trigger on some micro VGs

https://microaero.com/ocs/?socs=rv-ocs.pdf

$400 and seems like cheap safety insurance.

Anyone have these installed? Pros/Cons?
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  #2  
Old 03-19-2018, 05:54 PM
Davoakes@att.net Davoakes@att.net is offline
 
Join Date: Dec 2012
Location: Greenfield, IN
Posts: 240
Default

I put them on my 7A and saw very little difference in stall speed. I would not do it again.
They were not a negative, only money spent that was a waste.
Dave
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  #3  
Old 03-19-2018, 06:00 PM
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Dbro172 Dbro172 is offline
 
Join Date: Apr 2012
Location: West Fargo, ND
Posts: 1,017
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I dont know what the bugs are like down in FLA but I would not want to clean around VGs up here. A wipe down of the wings is a standard post flight routine here in the summer months. From the research ive Done I have not found them to be real noticeable, like on a skywagon, Maule or supercub...
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  #4  
Old 03-19-2018, 06:13 PM
Gisnar Gisnar is offline
 
Join Date: Nov 2012
Location: Northern Nevada
Posts: 129
Default

Put on my Longeze, 8% decrease in stall, no change top end. Would do again, easy to install
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  #5  
Old 03-19-2018, 06:18 PM
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N941WR N941WR is offline
 
Join Date: Jan 2005
Location: SC
Posts: 11,374
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If you want to lower your stall speed, sell the -7A and turn the cash into -9A.
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  #6  
Old 03-19-2018, 06:21 PM
Michaelpk3 Michaelpk3 is offline
 
Join Date: Dec 2016
Location: Sarasota, FL
Posts: 86
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Maybe I can just glue $20 bills on top of the wings instead...
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Donation gladly paid!
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  #7  
Old 03-19-2018, 06:28 PM
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RV8JD RV8JD is offline
 
Join Date: Jan 2005
Posts: 839
Default

My previous RV-8 had VGs and my new one does not (although both have the fuselage strakes installed). I can detect no difference between the two airplanes at high AoA, at the stall, or during normal approaches and landings. But I think they may cost a knot or three at high cruise speeds.

Nigel Speedy recently did a great article in KitPlanes on VGs on his RV-8. He flight tested before and after he installed the VGs. He found basically what I mention above, IIRC. Well worth reading before you install them on your RV-7A.

I am told by a knowledgeable and very experienced aerobatic RV pilot/builder that the RVs will hold on for a tad longer at high AoA while maneuvering with the VGs installed. But this is not noticeable in normal flight scenarios.
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Last edited by RV8JD : 03-19-2018 at 06:34 PM.
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  #8  
Old 03-19-2018, 06:47 PM
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humptybump humptybump is offline
 
Join Date: Feb 2011
Location: Eastern Shore of Virginia
Posts: 3,052
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The builder of my RV-8 installed VGs, tested, and decided to remove them. He then installed the wing root strakes (which are still installed).
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  #9  
Old 03-19-2018, 09:55 PM
SHIPCHIEF SHIPCHIEF is offline
 
Join Date: Mar 2008
Location: Seattle
Posts: 1,366
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You can make your own vortex generators and install them with double sticky carpet tape. I made 4 "Hall" type V-Gs and put them in front of the ailerons (2 ea) on my T-18. It had a profound effect on aileron control in stalls. They did not effect stall speed or top speed (that I could tell) but I didn't expect them to.
My RV-8 does not have V-Gs nor strakes. I did compete one season in IAC aerobatics, Sportsman Class. I don't see a need for them on the -8.
I don't see a down side, except washing the wing or snagging a finger.
VG's are fun to play with, then you can take them off and say "Been There Done That".
Might be a different story on a different aircraft type.
http://aircraftproducts.wicksaircraf...erator-kit/vtx
http://www.hallwindmeter.com/vortex.php
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Last edited by SHIPCHIEF : 03-19-2018 at 09:59 PM.
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  #10  
Old 03-19-2018, 10:11 PM
Gt-401 Gt-401 is offline
 
Join Date: Oct 2012
Location: Wray CO
Posts: 69
Default Rocket VG's

I have them on my Harmon Rocket, and like them. I bought the plane that way, so I can't tell you what a difference they made in that plane, but I can tell you that I can easily land the heavier shorter wing rocket shorter than the RV-4 I owned before it that didn't have the VG's.

The builder says that the VG's also dampen out the tail waggle that happens in turbulence, and the Rocket is more stable in yaw than the RV-4. Is it because of the VG's? Don't know, but I'm not taking them off.
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