Backcountry Pilot • Vortex Generators

Vortex Generators

Have you modified your aircraft? STC? STOL Kit? Major rebuild from just a data plate?
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Re: Vortex Generators

Interesting old thread. Some do and some dont like them. I guess the debate will always be...
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Re: Vortex Generators

Wasn't there more to this thread? There was some interesting post's this morning. Just asking.......
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Re: Vortex Generators

58Skylane wrote:Wasn't there more to this thread? There was some interesting post's this morning. Just asking.......


You've got thread confusion.
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Re: Vortex Generators

1SeventyZ wrote:
58Skylane wrote:Wasn't there more to this thread? There was some interesting post's this morning. Just asking.......


You've got thread confusion.


Yep, it was thread cunfusion :oops: . dang, I'm getting old. The comments about Vortex Gen. were on the "Tail Draggin Endorsement" thread. Something I had thought about installing on my plane, that's why I thought it was interesting reading. Anyway.......sorry for the mix up :oops:
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Vortex Generators

gbflyer wrote:I'm often times in the minority, but I don't think VG's do much for the 180/185 wing that Glidergeek is asking about. Not sure about the other Cessna's or Maule. Cub wing, been my experience that they work as advertised. I've tried both brands of VG. I'm not a very good pilot, so I've tried to take advantage of any "improvements" I could afford. If I had it to do over again, I'd take the $2K for the VG's/installation and put it towards Horton or Sportsman, or some more gas.

Have done before and after on 3 C180's and a C185.

The first C180 was a '55 with virgin wing. Put on the Horton. Was a low time pilot at the time, but it did certainly seem much more stable at slow speed.

The second C180 was a '57 with Sportsman. Flew for 50 hours and put on the BLR VG kit. No big difference, but it was a really light, excellent performing airplane to start with.

The last C180 was a '53 and had Sportsman plus MicroAero VG's. Flew it for 100 hours without VG's, then put them on. Only difference myself or my dad could tell was it became slightly heavy in cruise flight on the left wing after the VG installation.

The C185 had the factory cuff first, then the BLR VG's. No big change. Then we put on the Horton. Made a different airplane out of it.

By far the STOL kit, which ever one you choose, makes the most difference. Just remember to slow it down and fly it like it has a STOL kit, and you'll love it. Fly it like it still has the virgin wing, and you might float right on by the end of the strip. It has also been my experience that there is a bit of a speed penalty with all of the airfoil modifications. But there again, any aircraft I have owned has been at least 10kts. slower than what everyone else has.

Never tried the Wing X, but most reports I have gotten are positive, with the exception of possibly losing just a bit of aileron authority. But that is all hearsay as I have not flown one.

gb


That's very interesting. I've had a devil of a time working a left wing heavy characteristic out of my 170 ever since I bought her. You can compensate by various methods but by the time everything is tweaked she is out of rig and slower. Never in a million years would I have thought that the VG installation *might* have something to do with it.
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Re: Vortex Generators

once&futr_alaskaflyer wrote:
gbflyer wrote:I'm often times in the minority, but I don't think VG's do much for the 180/185 wing that Glidergeek is asking about. Not sure about the other Cessna's or Maule. Cub wing, been my experience that they work as advertised. I've tried both brands of VG. I'm not a very good pilot, so I've tried to take advantage of any "improvements" I could afford. If I had it to do over again, I'd take the $2K for the VG's/installation and put it towards Horton or Sportsman, or some more gas.

Have done before and after on 3 C180's and a C185.

The first C180 was a '55 with virgin wing. Put on the Horton. Was a low time pilot at the time, but it did certainly seem much more stable at slow speed.

The second C180 was a '57 with Sportsman. Flew for 50 hours and put on the BLR VG kit. No big difference, but it was a really light, excellent performing airplane to start with.

The last C180 was a '53 and had Sportsman plus MicroAero VG's. Flew it for 100 hours without VG's, then put them on. Only difference myself or my dad could tell was it became slightly heavy in cruise flight on the left wing after the VG installation.

The C185 had the factory cuff first, then the BLR VG's. No big change. Then we put on the Horton. Made a different airplane out of it.

By far the STOL kit, which ever one you choose, makes the most difference. Just remember to slow it down and fly it like it has a STOL kit, and you'll love it. Fly it like it still has the virgin wing, and you might float right on by the end of the strip. It has also been my experience that there is a bit of a speed penalty with all of the airfoil modifications. But there again, any aircraft I have owned has been at least 10kts. slower than what everyone else has.

Never tried the Wing X, but most reports I have gotten are positive, with the exception of possibly losing just a bit of aileron authority. But that is all hearsay as I have not flown one.

gb


That's very interesting. I've had a devil of a time working a left wing heavy characteristic out of my 170 ever since I bought her. You can compensate by various methods but by the time everything is tweaked she is out of rig and slower. Never in a million years would I have thought that the VG installation *might* have something to do with it.



My 182 always had a left wing heavy problem. I flew her for the last 7 years and everytime I told the mechanic doing the annuals that it had a heavy wing, they would just kinda muse out loud about it being 'out of rig', and never did attempt to address the problem. This year I helped my DM do the annual on the 182 and we just pulled the wing root flashing off and adjusted the attach point eccentric bushings. Problem solved. On another note, the 180 my cousin and I bought for the 135 cert. earlier this year has the Wing X extentions, Sportsman cuff, Vg's, and flap and aileron gap seals. That bird outperforms our PA-12 (which has VG's). Sure it's a PA-12 (not an -18), but we're talking about a C180 outperforming a Cub on gravel bars with a load (2 pax + gear). It's by far the most fun aircraft I've ever flown.
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Re: Vortex Generators

We took great pains to rig my 170B to fly absolutely hands off after I first took possession of it. Actually it was quite easy, and that bird cruised and stalled with the best manners ever. There's nothing mysterious about it unless there's some bent metal or...out of whack VG's. :)
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Re: Vortex Generators

My 182 always had a left wing heavy problem. I flew her for the last 7 years and everytime I told the mechanic doing the annuals that it had a heavy wing, they would just kinda muse out loud about it being 'out of rig', and never did attempt to address the problem. This year I helped my DM do the annual on the 182 and we just pulled the wing root flashing off and adjusted the attach point eccentric bushings. Problem solved. On another note, the 180 my cousin and I bought for the 135 cert. earlier this year has the Wing X extentions, Sportsman cuff, Vg's, and flap and aileron gap seals. That bird outperforms our PA-12 (which has VG's). Sure it's a PA-12 (not an -18), but we're talking about a C180 outperforming a Cub on gravel bars with a load (2 pax + gear). It's by far the most fun aircraft I've ever flown.


I would be surprised if Flap Gap Seals enhanced your STOL performance?? Agree with all the rest however.
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Re: Vortex Generators

JamieG wrote:
I would be surprised if Flap Gap Seals enhanced your STOL performance?? Agree with all the rest however.



I don't know what it flies like with the gap seals off, but as it is I can land it in about 300ish feet empty, and takeoff is shorter. All the while on landing the nose is at this incredible angle and the tailwheel will want to touch first. It just won't stall, you have to burst the throttle and come in hot to make a 3 point landing. I've flown it backwards taking off into a 35 knot wind before.
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Re: Vortex Generators

born2flyak wrote:
JamieG wrote:
I would be surprised if Flap Gap Seals enhanced your STOL performance?? Agree with all the rest however.



I don't know what it flies like with the gap seals off, but as it is I can land it in about 300ish feet empty, and takeoff is shorter. All the while on landing the nose is at this incredible angle and the tailwheel will want to touch first. It just won't stall, you have to burst the throttle and come in hot to make a 3 point landing. I've flown it backwards taking off into a 35 knot wind before.


Flap gap seals tend to interupt the flow of air designed to flow through the gap on the Fowler flaps. Some add them for speed. A friend put them on a 185 and it turned it into a dog at the low end. He took them off smartly. You have so many STOL mods that I suspect it is performing well because of them and despite the Flap Gap seals. Take them off and see if you notice a difference although I suspect that is easier said than done. Aileron gap seals are a different story however, they will improve aileron performance.

Just my 02
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Re: Vortex Generators

on heavier birds like my 182T, they are a definite advantage when low and slow...fly around at 50 and land when u want!
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Re: Vortex Generators

I have a 185 and was looking at the Knots-2-U Flap Gap Seals as they are easily removed for maintenance.
Might help make up the speed loss due the Cargo Pack.
Thinking most of my flying doesn't require STOL Ops, they would be beneficial during those times.
Also thinking that before going into areas that require the extra performance, I could take them off (last fuel stop before going in).
Does anybody here have any experience with the Knots-2-U Flap Gap Seals?
Any comments would be appreciated.
They are $500 and would hate wasting money.

Thanks

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Re: Vortex Generators

I put the Knots 2U flap gap seals on my 170B.
They are no longer on. Glad I did not put on the other brand that came as extra stuff when I first bought the plane in McCall because they are not removable. Well not easily removable. If you are intent on doing your own empirical testing then do go with the Knots-2U version.

I asked the fella I bought if from why he did not finish up with the flap gap seals. He said he was told not to use them for short field work. I thought he was just BSing me. Later, after not being able to get a good (usual) high sink rate for a steep approach, and almost making a mess of my plane on a no go around strip, I went back and questioned him some more. Seems that the advise came from one of the design engineers directly. My plane was rebuilt using some major resources at Airborne Express. One of the top mechanics allegedly knew one of the designers of one of the brands. All I can say is that I will never put the flap gap seals back on again, except maybe as a sales gimmick some day.

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Re: Vortex Generators

Forgot to mention, our 180 with the wing extentions has a roll rate of about 360 degrees per minute I'm guessing...horrible low/slow handling on gusty days, downright scary sometimes in fact...but other than that she sure is a blast!
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Re: Vortex Generators

born2flyak wrote:...
My 182 always had a left wing heavy problem. I flew her for the last 7 years and everytime I told the mechanic doing the annuals that it had a heavy wing, they would just kinda muse out loud about it being 'out of rig', and never did attempt to address the problem. This year I helped my DM do the annual on the 182 and we just pulled the wing root flashing off and adjusted the attach point eccentric bushings. Problem solved....


The wing attach eccentrics are the first thing to check with a heavy-winged Cessna. No offense, but I'm surprised it took you 7 years. My C150TD and my buddy's C180 both still had heavy wings even after taking both eccentrics to the (opposite) stops. His solution was to rig the flap down on the heavy side. My (better) solution was to tweak down the trailing edge of the aileron on the light side, and tweak it up on the heavy side. Worked great- just like adding an aileron trim tab. You don't have to tweak much- just put your thumbs in between the corrigations & lightly deflect the metal. If you can see what you did from more than about 12" away, you went too far.
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Re: Vortex Generators

The wing attach eccentrics are the first thing to check with a heavy-winged Cessna. No offense, but I'm surprised it took you 7 years. My C150TD and my buddy's C180 both still had heavy wings even after taking both eccentrics to the (opposite) stops. His solution was to rig the flap down on the heavy side. My (better) solution was to tweak down the trailing edge of the aileron on the light side, and tweak it up on the heavy side. Worked great- just like adding an aileron trim tab. You don't have to tweak much- just put your thumbs in between the corrigations & lightly deflect the metal. If you can see what you did from more than about 12" away, you went too far.



I have to agree. I bought a 180 about a year ago with a heavy wing. The plane had a "minor" groundloop years ago but the airframe looked really solid to me. After maxing out the eccentrics, rudder trim and dropping a flap the heavy wing was "corrected". The plane was just at Beegles to fix a rock ding so I had them re-rig it. After trammelling it (and determining that the airframe was straight) they put the eccentrics back to their recommended position (they don't use neutral but I forget exactly where they like to set them). They took the heavy wing out by massaging the trailing edge of the ailerons. Ailerons are airfoils in themselves. Steve
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Re: Vortex Generators

Quite a few jets even have VGs. The bad news is that since they came with the airplane they are also on the MEL. One gone is normally OK, depending on the type airplane, but two and you are grounded.
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Re: Vortex Generators

I had the Micro dynamics, the only brand PMA'd for the Maules installed 3 years ago. Like someone else said makes a big difference on slow speed landing control as does gap seals and little or no trim.
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Re: Vortex Generators

porterjet wrote:Quite a few jets even have VGs. The bad news is that since they came with the airplane they are also on the MEL. One gone is normally OK, depending on the type airplane, but two and you are grounded.


My installation came with an addendum sticker to the AFM indicating the airplane is unairworthy if four or more are missing.
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Re: Vortex Generators

once&futr_alaskaflyer wrote:
porterjet wrote:Quite a few jets even have VGs. The bad news is that since they came with the airplane they are also on the MEL. One gone is normally OK, depending on the type airplane, but two and you are grounded.


My installation came with an addendum sticker to the AFM indicating the airplane is unairworthy if four or more are missing.


I remember that same addendum but I also got a bunch of spares and some glue. I have only lost one in 3 years when I got a paint touch up that I attribute to human error. VG's is just another prefilght check that is on the list.
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