How Good Are Stepped (KF) Airfoils Actually?

Ғылым және технология

Ooh, a palindrome.
In this video, I find out how Kline-Fogleman airfoils perform, compared to regular airfoils.
Thanks to my Family for making this video possible.
Build Plans:
Tielo Full - docs.google.com/drawings/d/13...
Tielo Printable - docs.google.com/document/d/1f...
(Let me know in the comments if you would like a version of the plans with dimensions and measurements of each part.)
I used Onshape to help me design this aircraft. These are the CAD files if you want to look at the dimensions: cad.onshape.com/documents/900...
Filmed entirely on iPhone SE camera
Made in Adobe Premiere Rush & Videoleap
(Adobe Premiere Rush is kinda buggy so that's why there are some glitches in the video)
This project was done under adult supervision.
Music:
Ibrahim - Land Of Petals
Temporex - Nice Boys
glue70 - Casin
Chapters:
0:00 Intro
0:36 Explanation
3:44 Build Montage
7:32 The Experiment
11:08 Conclusion
DISCLAIMER:
This video is purely for entertainment purposes. I am not a credible source of information. Any re-creations of these creations, experiments, or anything similar is at the person(s) own risk. I am not responsible for any damages, injuries, or even death due to the results of your re-creation. PLEASE be safe out there, I don't want you to hurt yourself or others.

Пікірлер: 65

  • @_BL4CKB1RD_
    @_BL4CKB1RD_10 ай бұрын

    Remember, I’m not an expert on this subject so I probably got some facts wrong in this video.

  • @ZapTeam

    @ZapTeam

    8 күн бұрын

    Please make some rc models

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    7 күн бұрын

    @@ZapTeamis this not remote control?

  • @ZapTeam

    @ZapTeam

    7 күн бұрын

    @@_BL4CKB1RD_ Issa glider

  • @ZapTeam

    @ZapTeam

    7 күн бұрын

    @@_BL4CKB1RD_ no radio controlling

  • @ZapTeam

    @ZapTeam

    7 күн бұрын

    @@_BL4CKB1RD_ nm I saw ur flying wing build

  • @ryderphillips4464
    @ryderphillips446410 ай бұрын

    My dad showed me this airfoil in the70's. It was thought to be stall proof in a canard way. The rolling air in the gap would push the nose down just before stall speed.

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    10 ай бұрын

    That's very interesting.

  • @realreal3070
    @realreal307010 ай бұрын

    THIS GUY IS SO UNDERRATED BRO

  • @ralphbronzin9721
    @ralphbronzin972110 ай бұрын

    Great little experiment, definately something nobody has ever thought of. Maybe for more consistancy, you could simply run wind tunnel tests on the two standalone wings and compare the lift and drag data. If you don't have that, then it's always a great idea to find an excuse to build another airplane. Good work!

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    10 ай бұрын

    Originally, I meant to use a bungee launching system to help with consistency, but it never worked, so this was my Plan B.

  • @SvenGray-hx5to
    @SvenGray-hx5to2 ай бұрын

    I think KF airfoils are great in the RC field as a static wing shape. Modern commercial aircraft can modify wing shape via slates and flaps. Great video!

  • @ethanbarnes3973
    @ethanbarnes397310 ай бұрын

    Damn man thanks! Amazing video!

  • @dudermcgavin
    @dudermcgavin10 ай бұрын

    This Guy could make The D.M.V. Exciting!

  • @BrainDeadEngineering
    @BrainDeadEngineering7 ай бұрын

    I very enjoyed this ! rock on !

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    7 ай бұрын

    Thanks, you too!

  • @pacificWebsurfer
    @pacificWebsurfer10 ай бұрын

    good work for consistent air, best to try in dead calm (often best early morning or dusk), and possibly more effective to tow the glider and release by flying off a tow ring on a consistent length of line, on a big field, and timing the flight from release - preferably in a straight line, because turns induce drag that supposes equal speed for both if max distance is the comparison, otherwise you will be comparing "hang time" as the measurement fwiw, v tails look good, but they don't steer as well as rudder / elevator

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    10 ай бұрын

    Gotcha👍

  • @user-oe7el2sc2f
    @user-oe7el2sc2f10 ай бұрын

    Great video with potential

  • @Silvan-re1og
    @Silvan-re1og12 күн бұрын

    This could be a great slope glider or if the Wings are bigger it would be a probably good thermal glider

  • @basemandog
    @basemandog2 ай бұрын

    Great job! Was very informative. Would you mind sharing your dimensions for the high aspect ratio wing?

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    2 ай бұрын

    As of now, I have put the dimensions in the “Tielo Full” Google drawings file linked in the description. It can be found under the reference images section to the right. It is just a screenshot of the dimensions from the Onshape CAD file. Let me know if any part is unclear or if you would need any more help. Thanks for your time.

  • @PritneyBears
    @PritneyBears10 ай бұрын

    Nice video. Would have been cool to compare these airfoils to a straight flat plate. To eliminate the variability from the tosses, maybe drop them from some consistent height instead of tossing them.

  • @ninehunnerdriver
    @ninehunnerdriver7 ай бұрын

    Thanks new to RC and KF's now I know thank you

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    7 ай бұрын

    Glad to help. This hobby is very fun and cool, hope you the best.

  • @Elnufo
    @Elnufo10 ай бұрын

    The Duck is on the leftmost edge of the Screen, sitting in a plant. Can be seen from 3:44 to 3:48. And thank you for 8:39 i havent been franced in a while 😂

  • @yaimem
    @yaimem3 ай бұрын

    underrated channel. im gonna build the tileo plane u built. do u have a build video?

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    3 ай бұрын

    Oh nice, but umm I don’t plan on doing a build video. I like to showcase an extended build montage which shows most of the build process. I’d recommend some basic knowledge with working with foam board, and it uses the same build techniques as flitetest kits do. Maybe I could write some instructions, but most of it takes some intuition. I’m glad you found my plane design worthy enough to build. Edit: also, I found that one drawback to the Tielo is that it requires a heavy nose weight in the front, you could modify the design to have an extended nose in order to need less nose weight.

  • @yaimem

    @yaimem

    3 ай бұрын

    @@_BL4CKB1RD_ alright! Thats perfect i have built a few flitetest planes before so im familiar with those building techniques. I’ll modify the nose just like you suggested. Im always on the lookout for neat pdf plans and your plane is just that. Neat, elegant and also extremely simple to build. Thank you for this video man, subbed🙂

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    3 ай бұрын

    That’s great to hear. One thing I forgot to mention is that on the Google Drawings “Tielo Printable” file, make a copy. Then, drag any part into the checkered area (which is sized for a 11x8.5in printer paper). The design is meant to be printed to allow slightly more faster and accurate cutting of the parts, but if you would prefer, I could also list the dimensions and angles of each piece. If printed on paper, I’d recommend using pins to poke holes where corners are or hold the papers in place, you can also use them to trace straight lines. For the curves on the nose pieces, I poked a lot of holes following the path of the curve and used my trusty dusty pencil to connect the dots. I appreciate you asking. Let me know how it goes!

  • @VikashSingh-th9ez
    @VikashSingh-th9ez8 ай бұрын

    Nice & simple 👍

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    8 ай бұрын

    Thanks!

  • @AerialWaviator
    @AerialWaviator7 ай бұрын

    Great experiment, with an entertaining presentation. Really like how you designed the fuselage using foldable facets that mated triangular tail boom. Simple, but very effective design. Environmental conditions likely the biggest variable (ie: wind, turbulence) While inconclusive, your two data sets have many similarities. Plotting the data on a graph (two colours) could help show that data is evenly distributed. Being similar can be a very valid result. Nothing wrong with this. Would have like to have seen similar data on the higher aspect ratio wing (assuming it has the same wing area).

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    7 ай бұрын

    I appreciate the feedback. The high aspect ratio wing doesn’t have the same wing area, I just made it so i can fly it as an actual glider. If I do another experiment, I will keep graphing in mind.

  • @scottriddell7893
    @scottriddell78937 ай бұрын

    Nice video. Don't forget to add weight for the KF airfoil so that you are testing at the same flying weight. 👍

  • @patrickradcliffe3837
    @patrickradcliffe38374 ай бұрын

    So a few things that will make things easier and more consistant. A bungee launcher will give consistant launches. Also measure your steps and pace off the distance instead of the tape measure dance. In your next test try the Klein-Foggel airfoil with the step on the bottom I think you'll be pleasantly surprised at how much better ot does then the step on the top.

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    4 ай бұрын

    Thanks for your tips! I originally tried to do a bungee launch but couldn’t get it to work so hand launching was Plan B. I guess feet measurement would be more accurate and quicker(wouldn’t need to suffer as much through summer heat and barraging mosquitoes).

  • @user-zi2by5ss7i
    @user-zi2by5ss7i3 күн бұрын

    Please make more videos

  • @sidariell6762
    @sidariell67629 ай бұрын

    Im the 101 sub! And does the foamboard have paper cuz mine dont

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    9 ай бұрын

    Yes, it has paper. This is foamboard from my local Dollar Tree. Are you using depron foam?

  • @sidariell6762

    @sidariell6762

    9 ай бұрын

    @@_BL4CKB1RD_ no my country's foam board doesn't have paper but it's still foam board though

  • @IndraKurniawan-vk2qb
    @IndraKurniawan-vk2qb20 күн бұрын

    I like this editing style, hmmm, Need better mic tho

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    20 күн бұрын

    Yep, just my phone mic

  • @ralphjohnson4041
    @ralphjohnson40417 ай бұрын

    Can’t cope with anyone talking to me through a mask.

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    7 ай бұрын

    That’s fine.

  • @raypeery6317
    @raypeery63177 ай бұрын

    Why are you wearing a mask?

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    7 ай бұрын

    Cause identity reasons

  • @planker
    @planker3 ай бұрын

    MASK!!! BAD!!!

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    3 ай бұрын

    I respect your opinion. I don’t have anything else to hide my face tho.

  • @thetwogardens6048
    @thetwogardens604813 күн бұрын

    Why you wearing a nappy on your Face. ?????????

  • @grim4this
    @grim4this7 ай бұрын

    nobody wearing a mask should be listened too.

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    7 ай бұрын

    Then don’t. If you don’t like this content, don’t watch it. Simple, now go work on your grammar.

  • @grim4this

    @grim4this

    7 ай бұрын

    @@_BL4CKB1RD_ kzread.info/dash/bejne/jK6K3Mt7XcjFlco.html

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    7 ай бұрын

    Hey, you are wearing a mask too. Your anonymous online identity acts like a mask where you can rattle on mean things to people. Like you stated, no one should listen to you. Have a nice day!

  • @Sandokans
    @Sandokans2 ай бұрын

    Please ware the mask, it's very dangerous..

  • @danielcockerspaniel
    @danielcockerspaniel10 ай бұрын

    Everything in this video is wrong

  • @_BL4CKB1RD_

    @_BL4CKB1RD_

    10 ай бұрын

    Elaborate?

  • @yaimem

    @yaimem

    3 ай бұрын

    okay cocker spaniel

  • @NeilGaede1
    @NeilGaede12 ай бұрын

    Why are you wearing a mask?

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