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Kitfox - Vortex Generator Install and Test Flight

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Hope you enjoy watching as much as I enjoyed making this video
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#Redfox #Kitfox #Bushplane #HighSierraFlyin #TrentPalmer #bushflying #StickRudder #KitfoxTraining #MavicPro #cirruslife
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Опубликовано:

22 авг 2024

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Комментарии : 73

@vg23air 8 месяцев назад

THANKS GREAT RESEARCH EFFORT ,I have watched a ton of these and everyone else gets about your results before after. I am refitting a Loehle Sport Parasol and was concerned most about making part 103 stall speed and I have been convinced VG is the way to ensure that I can meet that, and this is just one more video that says its the way to get there. The only other way is to install >50% flaps ($$$$) and then the FAA gives me a few points on the lift coefficient on paper ( i dont have to actually ever use the flaps) but VG is a lot cheaper and a ton less work.

@walterbenson5275 3 года назад

Great 👍 information & tutorial!!!

@glenns6923 5 лет назад

Great video loved it, You know what mite make a fun video.. To show how busy your feet are (rudder) and stick are during some of your back country flying and off-airport landings ..I know would like. Thank you for your time in the making of all of your videos.

@AlexDiSessa 5 лет назад

Good suggestion.

@vancamjr 5 лет назад

Excellent video & experiment Alex. I especially liked the simulations for placement and type of VGs. We’re neighbors, I’m just over the hills at KLVK South hangers M20P.

@songmaster9308 5 лет назад

Excellent video!

@100clagman 5 лет назад

Missing good weather in Fresno too. Getting there, great video

@hotrodray6802 5 лет назад

Id like to see a pivoting pitot (on a ball) so it's always directly into the relative wind. I played around a lot decades ago in my Cessnas, and old rag planes, but never did it. I did modify so slips were equal.

@mikercflyer7383 5 лет назад

backcountry182 flies with vortex Generators and his low speed is 45 mph very impressive for a 182. Enjoyed the video.

@hotrodray6802 5 лет назад

indicated air speeds are misleading becausevof pitot angle

@michaelguy7168 5 лет назад

That’s it, I’m moving my VG’s forward. Thanks for the info.

@AlexDiSessa 5 лет назад

It works!!

@DanYocum 4 года назад

IIUC the Kitfox Speedster airfoil is a Riblett GA30-612. I’m *guessing* the STi wing is a Riblett GA30-613.5 (but I could be completely wrong on both of these). I wonder if adding a strip of dimple tape at 10% of chord length would make any difference in cruise efficiency and drop the stall speed another mph. Might be an interesting experiment to do.

@EZ_shop 5 лет назад

Love your home made tools, Alex. Ciao, Marco.

@JeffGillis1 5 лет назад

Alex, this was a fun test with real life before and after results. Mike Patey in his building of Drako has a great video on the difference between a slotted and a slatted leading edge and the drag effects of the airfoil when landing a tail dragger. If you wanted to get your stable slow speed down under 35-6 knots perhaps a slatted leading edge could bring you down to near 29 knots?

@JeffGillis1 5 лет назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-7hXOzES7fZE.html

@AlexDiSessa 5 лет назад

I am sure it could... but then I need to redesign my wing and it means no flying!

@flyingmaniac3827 5 лет назад

hey Alex happy you got the VG install , 2 to 3 Knots is a good gain , thanks for sharing , like the way you did the stencil , i would of go 1 Centimeter further back but three so meany opinion on the subject, i think you did great

@johnfife3062 5 лет назад

Great performance gains! Enjoyed your process and precision application methodology. Question: I didn't catch whether you applied VGs under your horizontal stabilizer. I'm curious whether doing so will help you maintain a higher angle of attack during low-speed flare.

@AlexDiSessa 5 лет назад

I did. I had 16 VG's left over and installed 8 on each side. I do feel my elevator with much more authority.

@johnfife3062 5 лет назад

@@AlexDiSessa Sweet!

@Kalimerakis 5 лет назад

would be interesting to put some strings on the wings and film them with and without VGs to see if the flow disconnects differently also couldn't it be that your flaps stall at that speed?

@AlexDiSessa 5 лет назад

I did computer simulations instead of the "strings".. Here's the video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-IYHuXs2F3ds.html

@Kalimerakis 5 лет назад

@@AlexDiSessa right I forgot about that Love your approach

@badr_marfou 4 года назад

There must be kind of sacrifice, I mean cruise speed or gas burn? Doesn't the VGs induce a slightly more drag

@spadesofaces1980 4 года назад

VGs on the wings don't really have much effect on cruise speed. They have more effect at higher AOA giving better control at lower speeds therefore lowering stall speed. He goes over this better in his first VG video.

@jayphilipwilliams 5 лет назад

When you said you're not going to put yourself in that position, do you mean you don't do full-stall landings? That seems like an odd statement to me. The goal is to be able to land more slowly and now you can. Nothing wrong with that.

@ChuckJ1944 5 лет назад

True airspeed might be better because you obviously have different angles of attack on the pitot tube (VTs on and off), don't you? Loose any VTs? Great tool and experimentation Alex! Chuck PS When I was a very young pilot, I tried full power on stall and ended up upside down, then spinning for 4,000 feet before I regained control. Be careful.

@hotrodray6802 5 лет назад

Vortex Generators

@hotrodray6802 5 лет назад

50 yrs ago we had to do 2 turn spins right and left at full power and idle.... just to pass a checkride.

@hotrodray6802 5 лет назад

as well as accelerated stalls, too

@kitfox7ss 4 года назад

Hi Alex, Great video. How did you determine the distance of 34mm? Stolspeed recommend positioning at 8 to 12% of Chord line?

@AlexDiSessa 4 года назад

I did a video on that distance. Check it out Vortex Generator video

@NicHolmes 5 лет назад

Curious as to why your stall speed is so much higher than mine... full flap power on I'm down at 27mph, power off at 31mph. Also STOL speed Vg's and placed at 3%. I have a video up on it as well

@AlexDiSessa 5 лет назад

It's likely because I am 300+ pounds heavier than yours. My total weight is 930lbs

@NicHolmes 5 лет назад

@@AlexDiSessa ah... that makes sense

@swlimitedbg 5 лет назад

Alex, Nice job and excellent video. I need to borrow thst clever tool to mark my cord line on my Kitfox V when I go to do mine. Hey, are those solar charging panels mounted on your turtle deck? If so, who is the manufacturer and do you like them? Thanks

@AlexDiSessa 5 лет назад

Yes, solar. They charge my cameras batteries. Works really well. www.amazon.com/gp/product/B06XBGSS2R/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

@bladerunner6282 5 лет назад

pretty convincing test...

@JeffGillis1 5 лет назад

Alex, sometime would please give us a tour of your panel set up?

@AlexDiSessa 5 лет назад

You can see a Kitfox tour here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mPMe8-3Ktfs.html

@dandaly7305 5 лет назад

There is a lot of movement on the plexi turtledeck; if it were stiffer, there would be less movement, probably less drag, and better airflow. Might be worth doing some testing with tufts to see how the air behaves, then install a thicker plexi, and compare. Do you recall what your speed was before putting on the bigger tires?

@AlexDiSessa 5 лет назад

The plexi will vibrate no matter what I put there. I was at 120mph before the big tires.

@hotrodray6802 5 лет назад

Alex. vibration or alternating vortices? Makes me wonder if tiny /short VGs might smooth the flow.

@hotrodray6802 5 лет назад

I know there was flow disturbance at the windshield top on my Cessnas. I was doing speed experiments.

@scsirob 5 лет назад

Alex, would you mind sharing your experience with crosswind landings when you have the VGs on? I've had them on my Rans and found that due to the lower stall speed, crosswind landings became harder. Lower forward speed means bigger crosswind component. Curious to hear if you noticed a difference

@AlexDiSessa 5 лет назад

I have not noticed any difference it. Although I did land on some nasty cross winds last weekend,.

@martinjnee3986 5 лет назад

Hi Alex, was your roll control improved much if any at low airspeed?

@AlexDiSessa 5 лет назад

Yes a little. A massive change on elevator authority as well.

@jrisinlove 5 лет назад

Love your setup. Would like a similar functionality. What does your control buttons for?

@AlexDiSessa 5 лет назад

Which buttons?

@jrisinlove 5 лет назад

@@AlexDiSessa on the stick. If I saw correctly you have four of them. Bit curious.

@AlexDiSessa 5 лет назад

@@jrisinlove It's my elevator trim UP/DOWN and my radio frequency toggle.

@larryehrlich57 3 года назад

No VG's on your tail????

@daveinwla6360 4 года назад

Alex, it would have helped immensely if you said the units when you said a number. When you were referring to 105, 110, and to 40, 41, 39, 35, I didn't know if that was airspeed, or horsepower, or gallons per hour, or descent rate, or degrees of angle of attack, or cylinder head temperature in centigrade, or what. Remember that we can't read your thoughts. The audio was really bad, which added to the confusion.

@gvrose1 5 лет назад

Alex, is the Garmin displaying knots or MPH?

@andrewmorris3479 5 лет назад

Gord Rose MPH.

@andrewmorris3479 5 лет назад

HotRod Ray The G3X display clearly shows MPH.

@hotrodray6802 5 лет назад

Alex says knots on my video.

@flutetubamorg 5 лет назад

Are those solar panels in the back? For battery maintenance?

@AlexDiSessa 5 лет назад

Yes, to charge the batteries of my cameras.

@bartgoins1782 5 лет назад

No VGs under the Horizontal Stab?

@AlexDiSessa 5 лет назад

I did place 8 on each side after the fact. It did help.

@ttt66372 5 лет назад

Link to purchase??

@AlexDiSessa 5 лет назад

stolspeed.com/

@hotrodray6802 5 лет назад

I find it strange that Alex repeatedly says KNOTS... yet the chart at the end says MPH. The comparisons are still valid but the terminology confusing... Speaking of which... the captioning is not accurate to vocals. lol.

@AlexDiSessa 5 лет назад

Yep, habit.. still getting used to MPH..

@hotrodray6802 5 лет назад

Yes thank you Alex. 50 yrs ago we were all MPH... it was rare to see an AS indicator in knots. As I recall the FAA used knots and all light planes were gauged MPH. Now its all Knots. Of course, I still prefer the old analog gauges instead of glass. :-)