The aerodynamics of flying wings (part 2)
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- เผยแพร่เมื่อ 14 มิ.ย. 2024
- In this video I look at the issues of roll and yaw stability, why flying wings are often swept back, how sweep produces a dihedral effect and unwanted yaw-roll coupling, as well as ways to reduce the unwanted effects of sweep.
I hope I've made this simple enough to understand and it encourages you to experiment with designing or modifying your own RC flying wing planes.
Please consider supporting this channel via Patreon so that I can continue to make more videos like this without littering them with interrupting ads every 5 minutes like some content creators are increasingly doing: www.patreon.com/user?u=2951605
MiG 17 picture by Robert Lawton
commons.wikimedia.org/wiki/Us...
A350 picture by Kiefer
www.flickr.com/people/xingxiy...
Both used under Creative Commons license:
creativecommons.org/licenses/... - วิทยาศาสตร์และเทคโนโลยี
I love these whiteboard videos. Whatever the topic I always learn something.
Love your videos and the information you impart. Keep up the work you do of pointing out the stupidity of the regulators and their paranoia against property destroying and life threatening small drones.
I wish I had physics teachers like you!
Just pure gold. You don't get to learn this kind of stuff on other RC channels. Thanks Bruce!
Yes, I would like to see to forward sweep wings also. Thx Bruse,For all you do for the hobby...
Ok honestly, don't get me wrong, I'm a 1st-year AeroSpace student and the professors at my university are very good. But this helped me so much, maybe he's not using the official terms but the concepts are explained perfectly. Thanks a lot, you made my homework and learning material much easier to understand.
There are no official terms but languages, university is official only for univeristy. Nicolas Tesla is not taught at university...
Awesome! I'm currently going to college for aviation / commercial pilot. Who would've thought an RC channel would help me understand my aerodynamics class! Thank You!!!
I came across this video and I was ECSTATIC... ☺ I'm a 59yr old and I fly drones, helocopters, and now fixed wing aircraft...
I need to watch all the previous videos and then catch up. This is so AMAZING and I feel like I'm back in school!!! 😃
The way it's taught is very educational and I'm delighted to have found this video... Now I'm subscribed and will be watching MORE...
May you Always remain in good health and many more years of teaching... God Bless YOU! ☺
I'm 16 and getting into 3D printing wings! Currently designing the first version of my very own wing, this video helped me understand the basics! Thanks! 😁
Would love to see one on swept forward wings. Also, your videos, energy and dedication contribute hugely to the hobby, and to our enjoyment of it. Thank you!
Thank you Bruce. Nobody else imparts such useful information in such an easily understood way with your unassuming dash of humor.
Best teacher EVER!!!
Can not thank you enough!
... Everybody deserves a teacher like you!...
Great video as always.
Your teaching style is second to none, and when it comes to the aerodynamics of flight, or anything rc flying related, there is no better source for the best information. even way up here in Canada, there's always discussions amongst the guys at our flying field that are based on your videos.
Always excellent info!
But you guys are upside down.
@@tedmoss Canada is upside down if you live in China and nobody know knows anything is in China
i love it when the white board comes out :)
I just want to say the very biggest thank you . Taking EASA ATPL Principals of Flight exams soon and am just overwhelmed by my missing knowledge from physics, you saved me from failure.
Really you need to not worry about your drawing, most of us can't draw but you get the ideas across and that is all that is important.
Thank you so much for these "classes", and thank you for all you do for the hobby.
I have subscribed mostly because of the "wibbly wobbly" line.
Great stuff!
Thank you Bruce for yet another fantastic educational video! I really enjoy your technical yet simple approach to explaining these awesome topics. Keep up the good work!
Man, these videos have helped me so much. Thank you for taking the time to make and post these beautys.
Really interesting, thanks! My Flite Test Mini Arrow wing has become my "fly me first" plane when I take models to the field, simply because it's so stable and friendly to fly. It's also fast and loud, which just adds to the fun. I didn't realize that so many factors go into the design of a flying wing until viewing your videos, so I now have a greater respect for the Arrow's designer.
one thing i've heard about wingtip devices (at least on conventional layouts, i.e. not flying wings) is that, as you mentioned, they function very much like an extension of the wing, that is, you get a higher aspect ratio without increasing the span - the drawback is increased drag - most airliners use them because it's easier to install than to re-engineer the entire wing - kit planes tend not to have them for the same reason.
A very good tutorial Bruce, and good use of the model to demonstrate how the various airflow influence can effect an aircraft wing. Thank you.
Sir, you have a rare skill for explaining complex subjects in an accessible yet humorous way.
I hope you do more and go into more depth as these videos are invaluable to those of us who design & build our own models. Thanks!
Very accessible! thank you. I designed and built my Fpv plane using the leverage principle , looks like a horseshoe with extending wingtips. Pic on RCgroups ,foufly blog. Long range 35mins on 1800mah, in the clouds.
omg this video was so good. ive always liked your videos, but this one tops them all because this is something ive been trying to figure out last few days. i got a new (my first) wing and it flew horribly. added som weight to the front and it turns out it flies like a dream now. Im speechless. you cannot point the importance of correct cg enough. amazing video again. thank you!
I chuckled every time Bruce made the wibblie-wobblie dance :D love this guy
Best Science Teacher ever...
Excellent! You are so right. Experimenting, developing the methodology, teaching yourself new skills. That's really good fun and so satisfying.
I was out of the Hobby for last 20 years. Thanks to you, Bruce I want to build a Delta Wing.
Sat here deciding whether or not to add fins / fences to my latest build and still finding this video useful. A+ !
great introduction. this will help a lot of people. thanks Bruce
Sir Bruce you're a clever bugger! Thanks for the video and I'd love to see one on forward swept wings too as I love the look of them but so far my attempts have been a tad unstable.
Bruce, please do more videos like this. I really enjoyed watching these videos and I definitely learned something, several things in fact. I "groove" really well with your style of sharing information, not a lot of fluff and mostly to the point with exactly the right amount of information. You really make this look easy and it's not. You're also to hard on yourself regarding your white board drawings. Very well done in my opinion.
Really enjoyed your explanations and the way you deliver them - both parts 1 and 2. Thankyou.
He’s such an amazing teacher
I was one who was going to ask about forward-swept wings, esp. as it relates to flying wings. Great video, and keep up the great work!
Thank you!! Just watched both parts! Now I have some understanding of what's going on with those flying wings!
Love the theory videoes Bruce.
The experimental stuff especially.
I Designed one of my experimental Delta winged aircraft off of the things you've shown in this video, It is currently one of my best flying planes to date!
A smashing introduction to aerodynamics! Thank you.
ive been thinking about making my own rc plane and this really did help me make changes to make the aircraft more stable
thankyou so much, your enthusiasm is infectious!
These aerodynamic videos are fantastic. I always learn something new.
This really explains why/what I don't like about flying wings. I've just never liked how they fly, and this is fascinating information. Thanks Bruce!
The Killer Spud you haven't flown the right wing then
Very interesting. A lot of experiments to do. I'm in the process of building a new wing. Thanks Bruce.
I wish i had calculus teachers like you!
I always learn something here!! I'm going to try these new skills in building with foam now. Thanks Bruce
Better explained than in my aerospace course. Thanks!
Thanks Bruce, great video.
Your videos are a joy to watch and learn from! Yes on Forward Swept Wings Video! And your funny tongue-slip, "McDonald Douglas" Skunk Works gave me a chuckle!
Wow.. learning much again.
Yeah, forward swept wings are very interesting, would like a video if you can.
Really like these educational type videos.
G'day,
Forward-swept Wings tend to try to twist and then snap themselves off the Fuselage, thereby requiring massively strong Spars, and heavy-duty Ribs to impart sufficient structural strength yo be able to resist such tendancies...; and when NASA tried flying an F-16 with Forward-Swept Wings, decades ago, they were looking for enhanced manouvreability (specifically, faster Roll-Rates...), but what they actually achieved was so aerodynamically-unstable that without a Computer to handle the Ailerons it was utterly unflyable, because no Human Pilot could wag the Stick fast enough to keep pace with the corrections needed in order to fly it level.
So Forward-Sweep, when it works, makes the Aeroplane much heavier than it would have been if built with Rearward-Swept Wings, and if the Computerised Artificial Roll-Stability System fails then the machine becomes utterly uncontrollable and promptly rips itself apart...; in the light of which findings it was decided that the small "enhanced Roll-Rates" theoretically available over those offered by not building the Wing backwards.., simply wasn't any kind of "benefit" worth chasing after.
But, Forward-Sweep looks "cool", perhaps even "kewel" ; so every now and then someone tries to find some kind of a loophole which might make the concept workable.
Such is Life,
Have a good one...
;-p
Ciao !
The normal F-16 is inherently unstable and flying is done by a computer, with the stick input from the pilot being sent to it digitally, with no mechanical connection to the control surfaces. F-16 pilots often joke about it's the plane that is flying them. And look at the F-117, it's flying diamond shape is so aerodynamically uncontrollable that it requires computer governed fly-by-wire.
Ahhh the bit about the tip-fins placement is interesting. Thanks Bruce!
Excellent video . Yes please do a video on wing fences and advantages of having vertical fins on a flying wing.
Great class, thank you. Looking forward to Part 3, and Part 4, and Part 5. :)
I appreciate the non-calculus approach.
It will be interesting when wing features are dynamically computer controlled.
Absolutely brilliant content! Thank you for making these videos. Take care
I’m preparing for my commercial check ride and this was very helpful. Thanks
Thank you. Great exploration on what's going.
Great video. Thanks for posting.
Hi Bruce,
Thank you very much for explaining the sweep wing planes design. Well done! I really appreciate your easy to understand logic that makes RC design more fun to learn. Perhaps you could write a book of your easy to understand explanations of RC design for those of us who love to experiment.
Ron
Funny thing about winglets/tip-fins. On the big airliners they can generate "lift" that is directed inward to the wing, but the lift vector can also be tilted slightly forward, so they help counteract their own drag.
This is very good Bruce:-) Thanks for sharing.
Really fantastic presentation!!!!!
Outstanding. Thank You for your series.
Excellent subject! Well understood and something learned!
Thank you.
Amazing explanation! Thanks for the video
Super cool lesson. Thanks for sharing.
Bruce, I am getting back into the hobby. I am mechanical engineer. I have always been a visual learner. Did best at school when prof could diagram out the “mechanics” of the problem is or theory. You videos are fantastic. I learn more in 15 minutes than reading hours of theoretical gobble-goop. Leave the detailed, in depth , complicated math to other..... just stick with your marker and whiteboard..... and keep doing those conceptual freehand sketches! You are really playing to people with good mechanical “instincts” ( not total math geeks) I love it !!!!
Request more videos on flying wing theory...... I am learning a ton!!!!
Jeff - Canada
Keep them coming Bruce, great informative video. Thanks
Great video and very informative, you solved my swept wing problem. You make the hobby interesting
, keep it up
Definitely one of your more informative videos Bruce. That should satiate the rumblings from the plankers :)
Reminds me of the hours spent trying to build a spaceplane in kerbal space program. Thanks for another great tutorial! Here's my wiki notes for anyone interested.
Planform
simple.wikipedia.org/wiki/Planform
Plan view
simple.wikipedia.org/wiki/Plan_view
Swept Wing
en.wikipedia.org/wiki/Swept_wing
Elevons
en.wikipedia.org/wiki/Elevon
Harmonic Oscillator
en.wikipedia.org/wiki/Harmonic_oscillator
Dihedral Effect
en.wikipedia.org/wiki/Dihedral_(aeronautics)
Dutch Roll
en.wikipedia.org/wiki/Dutch_roll
Wing Fence
en.wikipedia.org/wiki/Wing_fence
Washout
en.wikipedia.org/wiki/Washout_(aeronautics)
Wingtip Vortices
en.wikipedia.org/wiki/Wingtip_vortices
Thanks. Love the theory, it really helps. So hard to get an understanding straight from a book.
Itˋs all a bit Wibbly Wobbly, Timey Wimey... (Dr. Who to any that is unfamiliar with that expression). Love this aerodynamic video. Want more. 😀
amazing teacher, absolute legend
You are an excellent teacher.
The dangling wrench was hypnotic.
Excellent explanations! Thank you!
don't know why i'm watching this but video is really interesting
I admire your knowledge sir!
Thank you for sharing.
Thank you so much for this video. I have been flying wings and regular aircraft for many years, and could not get it through my head the how and why wings actually work. Again thank you so very much for this, this video is the first thing that ever made it through my ADD mind.
Gary
Marvellous, enjoyable and informative video Bruce. Many thanks.
Thank you for sharing this video. I’ve learned much.
Great video, finally some theory and analysis. We need a lot of this mister!
I really appreciate this informative video of yours. thankyou
Nailed it as usual. Thanks Bruce.
great video Bruce - thank you for your efforts
I am eager to learn about swept forward wings
good work thanks Bruce
Well done! I watch all TH-cam videos at 1.25 speed, and at that rate, you seem quite animated!! You deliver good content at a faster rate!
9:39 I think this explains why the YB49 did not have the stability to bomb accurately. thanks for the video
Very very interesting thank you for posting these videos Bruce. :)
I'm glad I stumbled across your page!
Thank you professor Beardy, this was extremely valuable.
Such a wealth of knowledge. Great video.
Thanks for the basic but always usefull information and explanation. A pratical experience for the S800 Sky Shadow... Thanks Bruce
Great video [as usual] RCMR. I guess that's why both my Opteras are such fine flying birds.
Good stuff, Bruce. Thanks.
So beautifully explained and fun to learn. Thanks for your video
Awesome explanation, Bruce!!
Wibbly wobbly??? No idea where that came from, but I love it.
Thanks for the education. I am learning a lot
Chuck
Over two years in to tuning quads and the best example of I and P gains to high are a passing comment in flying wing whiteboard video. You should post a P.I.D to high, 10 second video LOL
Thanks again Bruce
An old video but learnt a lot from this.
Thank you. It is very educative.