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Old 09-30-2011, 12:11 PM
Dmadd Dmadd is offline
Join Date: Jul 2008
Location: Camas, WA
Posts: 465

A few VG's on the inboard section of wing will do the same thing. Keeps the inboard wing section active at high AOA. Did it to my four, but it lowered stall so much it floated too much. I took them back off.
On the up side, NO ONE could turn with me.... So there was that.. :-)

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Old 09-30-2011, 05:10 PM
drakerv drakerv is offline
Join Date: Feb 2006
Location: Redmond Wash
Posts: 95
Default strakes

Please contact Brad Heinitz as he now handles the RV-8 strakes at:
360.588.2325 (shop)
206.818.4767 (mobile)
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Old 09-30-2011, 09:07 PM
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Wardo Wardo is offline
Join Date: Jan 2009
Location: Baker Florida (Sky Ranch)
Posts: 71
Default strakes

Please contact Brad Heinitz as he now handles the RV-8 strakes at:
thank you drakerv.
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Old 10-01-2011, 02:02 AM
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JordanGrant JordanGrant is offline
Join Date: Feb 2006
Location: Virginia
Posts: 291
Default learned something RV today

I had no idea about that mod. Interesting.
Jordan Grant
RV-6 N198G
Subscription renewed Nov '17
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Old 10-01-2011, 02:13 PM
Dragonfly Dragonfly is offline
Join Date: Jul 2009
Location: New Zealand
Posts: 51

As mentioned VG's should do the same thing, much easier to fit, and temporary if you dont like them.
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Old 10-01-2011, 06:14 PM
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DanH DanH is offline
Join Date: Oct 2005
Location: 08A
Posts: 7,844

Carl, I noticed you have strakes and VG's. Can you tell us how each affected performance and flying qualities?
Dan Horton
Barrett IO-390
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Old 10-01-2011, 06:35 PM
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humptybump humptybump is online now
Join Date: Feb 2011
Location: Eastern Shore of Virginia
Posts: 3,073

Dan, the builder of my RV-8 tested with the strakes and later added (and then removed VGs). He expressed that his VGs did not measurably improve any characteristics of flight.

Carl - do you have before&after experiences. I too am interested in your comments.
- Glen, ESVA
RV-8 FP IFR | Track my RV-8 | 53VG
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Old 10-02-2011, 12:44 PM
drakerv drakerv is offline
Join Date: Feb 2006
Location: Redmond Wash
Posts: 95
Default strakes

a response to me

I flew the RV-8 this morning for the first time since I installed the strakes. Wow, what a difference in the landings. I made three landings here and at Omak, and it is now very docile, even in three point landings. The attached picture is of--- landing at Okanogan, and he agrees it is a great improvement in landings.
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Old 10-02-2011, 12:56 PM
scsmith scsmith is offline
Join Date: Jan 2008
Location: Ashland, OR
Posts: 1,882
Default Another data point

I started my Phase I testing without intersection fairings (or any other gear fairings) and had a nice stall, nothing alarming.

After I put the gear fairings and intersection fairings on, I found a very strange sound more than feel just at stall. I don't get any tail shake, but a funny whooshing sound and slight vibration in the side of the fuselage that I believe is the vortex forming at the gear junction and running by the side of the cockpit.

I know this is odd - the reverse of common experience. Also, my stall speed seems high, but I have not thoroughly chased out any possible leaks in the static system. The instrument reads 3 kts high at 55 kt, and my "indicated" stall speed with flaps UP is 61 kts.

So, I don't know if I hit some magic shape with my intersection fairings that does this -- they look about like everyone else's. I've been thinking about adding the strakes.
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 515 in 9 years (would have flown more this year if not for fire smoke)
also LS-6-15/18 sailplane
VAF donation Dec 2017
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Old 01-24-2018, 12:38 PM
Boyd Birchler Boyd Birchler is offline
Join Date: Sep 2014
Location: IN
Posts: 158

We used strakes in an identical manor on a Pitts S1t experimental. The stock fabric covered gear had no problems, but when that was changed to aluminum gear; it limited max G in high G pulls. Adding the strakes got you about one G more, before onset of buffet, in a pull. Similar science but on a different airframe.
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