Flite Test - Airfoils - PROJECT
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- Опубликовано: 20 авг 2024
- Flite Test - Air Foils - PROJECT
In this episode of Flite Test Josh and Josh teach us how to build planes out of foil? Well maybe not, but they do explain airfoils pretty well. Watch this to learn more.
There is an old saying in aviation: "Put enough power on anything and I can make it fly." The real secret in aircraft design is to get the most speed/load with the minimum of power. I encourage everyone in the hobby to study the theory of flight and aerodynamics. There are many RUclips videos and even library books about it.
For me looking at illustrations of airflow around wings and other objects really helped me getting a feeling of what a wing is going to do in different airspeeds
Robert Evans thank you for those encouraging words! My grandpa got me into this hint and he's been flying since before even one channels came out. He's an expert in the science of this stuff and is teaching me! I hope everyone else learns about the science about this too, it really helps!
agree, they should do a spaghetti/marshmallow competion but for flying thing that flies with a payload from point A to point B using all the same raw building materials (same battery, same motor etc... but different aerodynamic designs).
you said library !
flitetest , can you please make a episode on how to design a wing for a glider or simple aeroplane .like the video should tell the step in determining the selection of airfoil , Coefficient of lift, wing span , chord length for a given weight of aeroplane .
an*
It doesn't look like they are knowledgeable enough to answer this question.
I would kinda like to see the foil covered airplane....though that's going to make radio reception a problem....
Tim Hyatt they should do a duct tape plane challenge.
not really much of a challenge... duct tape was created as an expediant battledamage repair means during the era of fabric wings...when the metal skinned birds started being developed in WWII, they developed better adhesives. it's why you'll sometimes hear it called 100 mph tape...cuz it'll stick on a plane flying that fast...
Tim Hyatt huh. Didn’t know that! You learn something new everyday!
Its actually really easy to add dihedral to any wing without hindering its structural integrity, all you have to do is hold it over the stove for a second why applying light pressure it the way that you want the dihedral and once it cools its just as strong as when you started, but with dehedral! I didn't come up with this, give Daniel of RCTF the credit for this idea! Anyway, hope this is helpful to someone and great video!
basal wood frame tin foil outer shell pellet or bb gun try to shoot down sounds like an awesome ep
Great idea!
or a plane made out of single sheet 3mm FFF
I believe this was the very first flitetest episode I ever watched. Nostalgia after 8 years or what!
Preciated balsa wood 🪵
you guys should create a small scale wind tunnel, make a whole series long testing different airfoil, take this to the next level.
À la rigueur, ces deux braves hébreux sont benifiques... bravo
Great episode! I just started doing scratch builds and it is nice to have an understanding of the various airfoils available
Josh Scott droppin the spinal tap reference! knew I liked that guy.
Love "The Tap!" Maybe you could incorporate "Gimme Some Money," into future episodes.
10years back the guy was shooting his video on high resolution camera 💕❤️
Hey flite test love the videos! But after I have personally done some fairly extensive testing in a wind tunnel using a 3dimensional force analyzer I can absolutely tell you that in the scale we use, a "kf" airfoil is just as inefficient as a flat wing. I tested 8 different styles of foils and a sanded blue foam foil worked e best ,
Got to love the S.T. reference though i think it went over tall Josh's head!
hi guys, ive been watching your videos for the last couple month, you guys great, im a noob in this hobby,.and probably thousands of people like me out there that start cheap, making scratch build and end up crash, i think it would be great if you guys make a video about scratch build, what do's and dont's..what props match to what setup..finding CG etc...you know what i mean...keep up the good work..cheers
@monboy10:
I'm glad they didn't because the equal-transit-time thing to explain lift is completely incorrect, just think about undercambered and symmetrical airfoils and inverted flight. Angle of attack is all you need, the air gets deflected downwards and generates lift as a counterforce.
I did a scratch plane , made a KF2 airfoil, put the CG where the geometry of the wing dictated and it flies fine.. used 40% of the chord for the step and 7% higher
That plane at 1:22 is the one I wanna build also!
You guys should do a compitition, where you have a certian motor, and you have to make an a, airfoil, ect ect. Amd then at the end put them to a couple tests to see whos design is better
ok so you guys make planes! cool! but you are making smaller versions right now and i cant wait for those but you should also make bigger versions also! it would be good because i fly at a field and when flying my spit its kinda hard for me to see it! hope you take this idea into consideration!
Kentucky Fried Airfoil, I laughed that out! Haha! Cute!
I'm excited for your next episode, that thing looks awesome.
@monboy10
Gliders, too. I'm doing mostly cross-country flying, most adventurous and exciting type of flying.
Can we please get more Josh Scott on the show? PLEASE????
Kline-Fogleman is actually two people, Richard Kline & Floyd Fogleman. Their airfoils don't get used enough IMO.
wow guys! absolutely loving these videos! i REALLY need to find some dollar store foam, and go out and build my own plane :D i definitely have an idea for a wing now!
Great! I now want to make a scratch built with a KF airfoil for my GoPro!
Would have been nice if you posted a link to a reference of airfoils or similar resource:
Interesting video, more in this vein, please.
P47- The plane at 1:40 is a scaled down FT flyer, the plans are on the Flitetest site. Just print them at 50%
just out of curiosity, the mini dart/ftflyer @1:23 in this video is really cool and id love to know what electronics one might buy if they were going to build one? Id love to try and build 40-50% models of some of the planes for indoor flying.
Turbolence = more drag and less lift, but if you have a lot of thrust... You can fly
@coa106 yes
Good job guys ,great info.Thanks
HOLYSHITHOLYSHITHOLYSHIT!!!!!! I've been wanting to build an rc avatar gunship for a long, long time. I LOVE YOU GUYS!!!!!
How do you know what is the right (or best) airfoil for the conditions you want?
you guys should make a video on how to make the airfoil
KF airfoils are more of a build technique to replicate yhe other airfoils.
Flatbottom=KF2
Symetrical=KF4
Undercamber/flat=KF3
when you change airfoil, do you see a significant difference in flight time with the same battery fully charged ?. you should make a competition for RC flying things that flies the same payload from point A to point B (everybody using the same battery+same electric motor+same propellar+same RC electroncis+same payload in the form of a good camera that delivers you good images for your video of the event, same amount of building material (balsa or foamboard). it would be fun and super interesting from a aerodynamics innovation perpective people being free to choose their design within these constraints and not necessarily in the shape of a airplane. ( something like the marshmallow/spaghetti competition the winner being the one with the most remaining battery charge after reaching point B).
Good question. One wishes they had given a comment, though one thinks a definitive answer might have been difficult
Thanks, guys, for showing people some of the benefits of,the KFm3 airfoil. Have you checked out the KFm4yet?
@monboy10
Well, quite a lot of full size airplanes have an undercambered wing, especially those who need lots of lift at low speeds. Read the wikipedia article on aerodynamic lift if you like. I'm a full size pilot and I'm happy to know that I'm flying not because of pressure differences but of newton's law about active and counterforce.
On the cessna is i think a KFm3 airfoil
Using undercamber airfoil for scratch built plane
i just built my first armin wing in an hour
(With apologies to Queen):
"Flat-bottomed wings make the RC-ing plane go round!" :D
Damn you FOILED my plan...
This comment was made 5 years ago and idk if anyone at all is gonna see my reply, but thanks for sending ur sense of humor to the future.
How does the symetric produce "lift". Looks like it produces lift for both sides, please explain :P
Kline - Fogalman. I believe it was developed between two people whos last names were.... Kline and Fogalman.
also could have went over the 4 main KF airfoils.
lol. sorry to nit pick.
guys, CG question. did you balance aircraft with KF airfoil at 1/3 back from leading edge?
Followed closely by the armin airfoil. All were same chord camber and span
for an aerobatic plane, especially something delta wing like an F16, if there any difference between a flat airfoil and symmetrical one? it seems they both rely entirely on AOA for lift, so why bother with the curved symmetrical profile like you get on a real extra 300/edge 540 kind of plane?
so proud of josh, the guy learn so much lol
Where can we find different graphical airfoils already designed so that we can just take a screenshot of it, print it, hotwire etc and make a perfect efficient wing. Or if you can tell me how to design your own very efficient airfoil design
How does a symmetrical airfoil create lift? If the air takes the same time to get across on both sides, then the air pressure on both sides of the wing is equal. The Bernoulli effect works on the basis that the pressures are not equal. someone explain pls?
Well I'm 13 so don't expect a scientific answer, but from what I've learnt, the symmetrical airfoil produces no lift although that's what the elevator is for, I'm sure if you are flying an aerobatics plane, you don't want it to go up or down without you touching the elevator. Because if you are going for a stunt, you don't want it to move out of the barrel roll. (Pardon my punctuation.)
Yeah I remember stunt planes have symmetrical and so do fighter jets. I just didn’t get the point of that against just a flat wing... oh well. I’m 14 by the way haha
Im not sure. LOL
Gautam Krishna I just realized it's because those planes always go upside down so it's just so it's more agile when upside down
Are we gonna get a video on the little BluDar looking plane? I would like some specs.
Not to steal any attention away from these excellent Flite Test videos, but if anyone is curious to learn a little more about the Kline-Fogleman family of airfoils there is an interesting (IMHO) article about Richard Kline and Floyd Fogleman and this weird airfoil technology on Wikipedia. Won't post the link here, Just search "Kline-Fogleman airfoil" and you'll find it. Thanks, Josh and Josh and everyone at Flite Test.
good advice flite test
still waiting on tinfoil plane?
2019 and still waiting...I have folded tin foil to make planes the same way you can from paper, although I don't think that's what we are expecting from these guys
is there a episode on that black scratch built micro plane?
Yeah foil squared. Great idea
What ever happened to Josh Scott?
It's November, 2020. Josh Scott now has a channel Memoirs of WWII where veterans tell of their experiences. IMO this is a great thing to do while the opportunity to hear their stories first hand still exists. If you are remotely interested in WW2 history, I would suggest you check it out.
what airfoils would you use to make one for a glider
Is it a Hobby King Sezna or a Cessna?
Awesome as usual! :)
awesome
why do KF airfoils not work on full sized aircraft?
Out of curiosity, is it possible to build an aerobatic wing like the KF? (Mirror the top to the bottom?)
Yes, look at a KFM 4, it's a symmetrical wing.
"if it's not going to work it's going to crash" lololol
@binini1 Yeah, that's exactly what I thought! Did work good though.
GR8 info Guys
no worries :)
Hey Flight Test, I know that from watching your videos and most of the websites that I have visited, people recommend foam boards to build airplanes. I wanted to build one out of another material though and I was wondering if you had any good recommendations for me. Also thanks for all the videos, they are all very helpful.
I know I'm a bit late but balsa and monokote is probably the next best thing.
Kline-Fogelman airfoil is named after two guys, Kline and Fogleman.
so exited for the avatar gunship :D
usa-35b is the best for trainers and small stunts
is there build plans for that mini ft flyer?
what's the name of the airfoil on Cessna wing?
what plane is that first one you showed, do you have plan? It looks nice
Can you make a KF airfoil as a symmetrical airfoil??
"So why is it....? (I was expecting an educational explanation) Because we're LAZY." hahaha
@monboy10 I meant on the foam wing :)
can't wait for he avatar gun hip or scorpion from halo 3
you guys rock...
Kline-Fogleman airfoils are named after two different people, not a single person.
@mxf7010g8k - Richard Kline & Floyd Fogleman
Voice crack by Josh Scott at 7:23!
When are you going to review that P-51 in the background?
Anybody realize the Flitetest logo at 00:7?
Can you do a video over the dogfighter?
designed by Richard Kline & Floyd Fogleman :)
I really want to get into the hobby but im 13 and scared that im going to get it in the air and im going to loose site of it... any advise? PLEASE? Anyone not just Flitetest...! :)
@thumper248 "says nah" ? :)
what do you cut foam with ?
Prayag Desai a fork
make the foil plane :3
@EnterpriseXI go to their channel and search FT flyer
140 how did u make that I really want one
Make A Tutorial Of The plane in Josh Scott's hand at 1:22 :D
Smart Dart XS
Is it just me or does 3 hours to build a Kf airfoil sound like a really long time. Mine normally take about 10-20 minutes
0:42. Your welcome for josh's face
Actually more like 0:41.8
What was that Intro Song?