Nearing completion on my build and I really appreciate you taking time out of your day to make videos like this, definitely helps out first time builders like myself! I never post comments but I feel this one deserves a big THANK YOU !
First time watching you... you got me hooked. Very educational and detailed information. Between you and Trent .Makes me re- evaluate my life and wanting to get back into flying. Especially the kind of flying you guys do. Never meet you or Trent, but you guys inspire me to try and reach some new goals. Thanks look forward to your videos.
THANK YOU! thank You so much. I have been watching Trent for several months now and up to now . He has been the only voice that I felt I could trust. Now You have given me that second voice. Two heads are always better than one. I am a NON-licensed Pilot trained by a U.S. Air Force Col. I can fly, but building them is a little out of my line. But I am trying, not easy at 63 yo. THANKS Again.
I’m hooked on everything! Such a amazing job with tips and incite! I just bought a Apex…now I just need the fuselage…wings, tail end, landing gear etc haha.
Thanks for the video. I agree I also have the stolspeed VG's on my SS7 at about 4-5% (thanks Trent) much better feel at slow speed and about 4 kts slower stall. I have the larger elevator with the 912 so I don't feel I need them on the tail. All the best!
I think it should matter more where the separation point is on the wing at stall right? it's not linear on a rectangular wing anyway but keeping the VG's in laminar flow would seem important.
Excellent video. I had been one of the folks poo-pooing VGs on a Kitfox. Now I'm intrigued too... It would be interesting to see with my modified elevator, much larger than OEM.
Alex Di Sessa and Mike Patey both got great results as well with VG's, they went more towards 3% and didn't install on horz. stab. just wing, my tail feathers on a J3 kitten are just flat surfaces, would i still benefit from VG's on horz. stab.? look up Alex Di Sessa install he has very clever install tools and templates to use for the VG's during install, maybe use a stronger (grey) 3M UHB adhesive tape as well? as Alex wasn't too impressed with the adhesion of tape that came with kit.
Wow that's incredible. Did you really not see any difference in top end speed? I have considered adding VG's but haven't yet due to an already low 40mph mild stall in my Series 5 stock. Do the stalls in your Kitfox become more dramatic with the VG's?
I put vg's on my kitfox 4 speedster A few years back, they lowered my stall Speed 4 or 5 mph but also lowered the Top end speed about the same. They didnt make short field landings any easier with the lower stall speed as when You slowed it right down the decent rate was to high to land safely. I ended up Taking them off and adding wing tip Extensions. The longer wings enabled Me to land in tighter spaces by lowering My approach speeds, also it climbed better and cruise speed especially at attitude wasn't affected. Only slight Negative slower roll rate and doesn't Slip as well with the longer wings
That's very interesting. Is it your impression that pretty much any airplane would get a reduction of 2, 3, 5, 8 mph stall speed with vortex generators, or only airplanes that are already designed to have [fairly] good STOL performance? Also, do the vortex generators reduce cruise or top speed or fuel efficiency? Thanks!
max bootstrap That is a good question and I’m not sure how it would effect faster flying wings, but some airliners have them on them so possibly. They didn’t effect my cruise at all and I didn’t notice any change in fuel burn.
This seems like a much more basic kit than I've seen advertised. No template to easily install. You did a lot more work deciding location and all the setup prior....What did this set cost? It seems like these should work on basically any plane. Doesn't need to be a STOL aircraft. It's physics. This was very informative.
K-Man S This is the STOL SPEED VG kit. It does come with a template to set the angle of the VG’s however the distance back from the leading edge has to be decided upon by the installer. They should work on anything with a wing. I believe the cost was $152 for the wing and the tail.
That's a steal from the prices I've seen on these VG kits. Like $1200+. I figured that $1200 plus was for the time spent testing and perfecting the mount location. I know they are standard equipment on the Carbon Cub now. Have you looked into slats at all? I hear they really help reduce stall speeds.
Ken Hurley when he had his big bore 912 he was putting out close to the same horse power but at 100 lbs lighter. To be honest, I have never flown a total powered Kitfox. If or when I build another, I will try and demo as many variants as possible. I would not do an O 290 again only because there are better higher hp options out there now, Titian is about the same weight at 180hp. I am very happy with the performance of my setup. Cruise over 100 at 5.5gph and climbs strong even out of the Idaho backcountry.
No VG's on the extended wingtips? Did you run short? I would expect that it would civilize the tip vortex, lower the stall speed slightly, and improve the character of the stall.
Good day. Fell in love with a Kitfox plane. I'm from Russia. I would like to build such a plane. Could you help with the drawings for the construction of this aircraft. Or say where to get it. drawings. thanks for earlier
Anri, there are no drawings available. The Kitfox factory protects the drawings. You would have to order a Kit from them. A good airplane to build from drawings is a Bearhawk. bearhawkaircraft.com
Tor Blackthorn Not sure what you mean? No trim tabs on the elevator on the Kitfox 5 and newer, instead the entire horizontal stabilizer moves up and down with an electric trim motor to control pitch trim.
you made vortex too far, 8 % no newer working anythink, but 3% have perfect to foxkit wing, just lookinmg has siimulated and calculater best position to vortex, and lot better have all test 3% than 7% 8 % has too lot and no work anythink. 5% have too lot . 3% have perfect all test. and simulations.
Thanks for your research and information.
Nearing completion on my build and I really appreciate you taking time out of your day to make videos like this, definitely helps out first time builders like myself!
I never post comments but I feel this one deserves a big THANK YOU !
First time watching you... you got me hooked. Very educational and detailed information. Between you and Trent .Makes me re- evaluate my life and wanting to get back into flying. Especially the kind of flying you guys do. Never meet you or Trent, but you guys inspire me to try and reach some new goals. Thanks look forward to your videos.
THANK YOU! thank You so much. I have been watching Trent for several months now and up to now . He has been the only voice that I felt I could trust. Now You have given me that second voice. Two heads are always better than one. I am a NON-licensed Pilot trained by a U.S. Air Force Col. I can fly, but building them is a little out of my line. But I am trying, not easy at 63 yo. THANKS Again.
If you get into difficulty John Gilpin at Stolspeed is your man.
I’m hooked on everything! Such a amazing job with tips and incite! I just bought a Apex…now I just need the fuselage…wings, tail end, landing gear etc haha.
Nice job....my findings also....they definitely work and worth the effort...
Thanks for the video. I agree I also have the stolspeed VG's on my SS7 at about 4-5% (thanks Trent) much better feel at slow speed and about 4 kts slower stall. I have the larger elevator with the 912 so I don't feel I need them on the tail. All the best!
Did you include the flaperon in the measurement when finding the 5% or just the wing cord?
Useful stuff - so many flyers don't like to get technical on film!
Just added VGs to my 7ac. Haven't flown it yet. Hope I get similar results.
I think it should matter more where the separation point is on the wing at stall right? it's not linear on a rectangular wing anyway but keeping the VG's in laminar flow would seem important.
Fantastic, thanks for your help. I'm sold
Excellent video. I had been one of the folks poo-pooing VGs on a Kitfox. Now I'm intrigued too...
It would be interesting to see with my modified elevator, much larger than OEM.
Alex Di Sessa and Mike Patey both got great results as well with VG's, they went more towards 3% and didn't install on horz. stab. just wing, my tail feathers on a J3 kitten are just flat surfaces, would i still benefit from VG's on horz. stab.? look up Alex Di Sessa install he has very clever install tools and templates to use for the VG's during install, maybe use a stronger (grey) 3M UHB adhesive tape as well? as Alex wasn't too impressed with the adhesion of tape that came with kit.
Nicely done, Bryan
Greatest video and info thank you.
Wow that's incredible. Did you really not see any difference in top end speed? I have considered adding VG's but haven't yet due to an already low 40mph mild stall in my Series 5 stock. Do the stalls in your Kitfox become more dramatic with the VG's?
I put vg's on my kitfox 4 speedster
A few years back, they lowered my stall
Speed 4 or 5 mph but also lowered the
Top end speed about the same. They didnt make short field landings any easier with the lower stall speed as when
You slowed it right down the decent rate was to high to land safely. I ended up
Taking them off and adding wing tip
Extensions. The longer wings enabled
Me to land in tighter spaces by lowering
My approach speeds, also it climbed better and cruise speed especially at attitude wasn't affected. Only slight
Negative slower roll rate and doesn't
Slip as well with the longer wings
That is interesting that it effected your cruise speed. I had a different experience.
That's very interesting. Is it your impression that pretty much any airplane would get a reduction of 2, 3, 5, 8 mph stall speed with vortex generators, or only airplanes that are already designed to have [fairly] good STOL performance? Also, do the vortex generators reduce cruise or top speed or fuel efficiency? Thanks!
max bootstrap That is a good question and I’m not sure how it would effect faster flying wings, but some airliners have them on them so possibly. They didn’t effect my cruise at all and I didn’t notice any change in fuel burn.
What was going on with your turn coordinator?
HAHA, so many comments about that dang thing. It was broken. It has been removed and upgraded to a Dynon D6.
Did you loose any cruise speed? Did not add any drag? How? Tnks
No loss in cruise speed at all.
Nice informative video,... thanks !
Fantastic results!!!
This seems like a much more basic kit than I've seen advertised. No template to easily install. You did a lot more work deciding location and all the setup prior....What did this set cost? It seems like these should work on basically any plane. Doesn't need to be a STOL aircraft. It's physics. This was very informative.
K-Man S This is the STOL SPEED VG kit. It does come with a template to set the angle of the VG’s however the distance back from the leading edge has to be decided upon by the installer. They should work on anything with a wing. I believe the cost was $152 for the wing and the tail.
That's a steal from the prices I've seen on these VG kits. Like $1200+. I figured that $1200 plus was for the time spent testing and perfecting the mount location. I know they are standard equipment on the Carbon Cub now. Have you looked into slats at all? I hear they really help reduce stall speeds.
Nice video man!
Hola. Cuántas hs lleva armar un kitfox 5. Saludos desde Argentina
What engine platform is your kitfox? 912 uls?
Jason Howes I run a Lycoming O290D 125hp.
Project Kitfox just getting ideas for how I want to build mine, and checking out the setup that others are running.
How does the 125 hp perform as compaired to Trent's 100 hp?
If starting all over,,,, would you install an engine with more hp?
Ken Hurley when he had his big bore 912 he was putting out close to the same horse power but at 100 lbs lighter. To be honest, I have never flown a total powered Kitfox. If or when I build another, I will try and demo as many variants as possible. I would not do an O 290 again only because there are better higher hp options out there now, Titian is about the same weight at 180hp. I am very happy with the performance of my setup. Cruise over 100 at 5.5gph and climbs strong even out of the Idaho backcountry.
Has any one staggered a set of VG's... Example 4 then 6 repeating?
No VG's on the extended wingtips? Did you run short? I would expect that it would civilize the tip vortex, lower the stall speed slightly, and improve the character of the stall.
I'll try VGs on my Piper SuperCub RC Model. ;-)
How about in a turn, like base to final?
Rock solid, much more stable at low speeds.
I take it that even with two-sided tape, the vg's are not easily removable or relocatable.
Peter Royers you can just pull them off and use more of the adhesive tape and place them elsewhere. It would be a pain to move them all.
one drop alchohol and 2 side tape drop out itself, no neew broken wing.
I have watched all the apex videos and alot of your flying videos. What is your name.? If you said it I have missed it.
Bryan Bowen
Good day. Fell in love with a Kitfox plane. I'm from Russia. I would like to build such a plane. Could you help with the drawings for the construction of this aircraft. Or say where to get it. drawings. thanks for earlier
Anri, there are no drawings available. The Kitfox factory protects the drawings. You would have to order a Kit from them. A good airplane to build from drawings is a Bearhawk. bearhawkaircraft.com
I put thos on my KitFox4.
It was around 19 minutes.
41 is good
Elevators? try your trim tabs.
Tor Blackthorn Not sure what you mean? No trim tabs on the elevator on the Kitfox 5 and newer, instead the entire horizontal stabilizer moves up and down with an electric trim motor to control pitch trim.
you made vortex too far, 8 % no newer working anythink, but 3% have perfect to foxkit wing, just lookinmg has siimulated and calculater best position to vortex, and lot better have all test 3% than 7% 8 % has too lot and no work anythink. 5% have too lot . 3% have perfect all test. and simulations.