Spinny Bird - Weird Magnus Effect R/C Aircraft

Magnus Much?

[@rcbif101]

Yes, I really did mess up my video 2 seconds in. The aircraft has been renamed "Spinny Bird" - not flappy bird.

[@vibhu9725]

Please provide ur email address, we need some information regarding ur model

[@ahmdabdallah5811]

What Is Islam? Islam is not just another religion. It is the same message preached by Moses, Jesus and Abraham. Islam literally means ‘submission to God’ and it teaches us to have a direct relationship with God. It reminds us that since God created us, no one should be worshipped except God alone. It also teaches that God is nothing like a human being or like anything that we can imagine. The concept of God is summarized in the Quran as: { “Say, He is God, the One. God, the Absolute. He does not give birth, nor was He born, and there is nothing like Him.”} (Quran 112:1-4) Becoming a Muslim is not turning your back to Jesus. Rather it’s going back to the original teachings of Jesus and obeying him

[@PeterSripol]

Awesome! So thats who you were! loved this thing at FF. It definitely flies better than mine!

[@rcbif101]

Thanks! I hope you consider a re-visit to your bucket-craft. Perhaps a prop-wash assisted wing like mine with more of a minimalist carbon fiber design to save weight? Ramen noodle cups come to mind for a mini version ;). Stay in touch, I plan on doing an upset recovery video video soon on this. It's more stable than I though!

[@MustafaKhan-pv3qs]

PeterSripol , I watch your KZbin videos! I subscribed!

[@magnetosworld6311]

@@rcbif101 new subscriber here I like that design imagine it being a full-scale transport aircraft for American Airlines per se

[@magnetosworld6311]

The turbines will be at the tail end. I can see this happening reply P 10 times safer than your regular Air transport

[@rcbif101]

@@magnetosworld6311 Hi. Glad you like it, but it would be dangerous. It does not glide if the engine fails, and furthermore, it is very draggy and inefficient. It's mostly just a cool novelty.

[@jeremytenorio3099]

Me watching video, hears plane: "There's a plane' You filming, pans camera up: 'There is a plane. ' Very cool sir. And also.. 'Googly eyes, those are critical' Well done build!

[@Avetho]

I like this! "Alright, high speed pass." Meanwhile the sound is making me think the bird's internal thoughts would be "How many puny hoomans can I abduct this time?" Its definitely a unique sounding RC plane :)

[@BrianPhillipsRC]

Cool! Just don't look to close if you get seizures - LOL! "High speed pass" - LOL - loved it! I bet it's a lot harder to make than it looks - Good Job!

[@corgraveland4874]

What a great design! Great performance and control, what a showcase already. And sure you will continue! Thanks and look forward🛫👍👌

[@66tbird1]

Nice to see it fly. I called mine a tumble wing. That was 30 years ago using a 1/2A and balsa monokote. I needed more power so I only got an extended glide. I'm amazed how close my was to yours. I got the idea when a trim of monokote tumbled across the room.

[@belina65]

Awsome! Bravo. Fantastic slow fly.

[@Peter-zz9ur]

To Rcbif - Really cool aircraft, thank you. I had a Magnus effect KITE in the 1950's, it had a little sweepback and a little dihedral, on the wing rotor spars. This made it much more stable.. Maybe you could try that..? It had no end-plates, maybe they are not needed.

[@mickcarson8504]

Models like this already existed back in early 60's, but not motorized in any way. It was airlifted as a kite, helped by the rotating wings shaped like an S, while this model has flat wings. The whole thing would lift up while the wings were rotating against the wind and was held with a fishing line, exactly like flying a kite. In the distance it looked like a Hawk hovering above, and this model reminds me the same, a Hawk or some sort of bird with slow beat of wings. The 60's model wings were angled slightly upward like a kite so that the model would remain steady in the air. Amazingly, after all these years since the 60's I now see one, and it's electric.

[@gerardcollins1767]

one of my favourite toys,made a lovely whirring sound.

[@johnhardman3]

I had an acetate-plastic rotary-wing tow-glider with a wing like this back in 1958: it was bought as a present from a Woolworth's branch. I've never come across anything similar in the 60-odd years between then and now (in this video).

[@rcbif101]

Was it like the Gunther Turboprop?

[@Michael-yn7iu]

It was definitely cool to watch it fly at FFE2017.

[@Abderrahmane_Aitouche]

Un petit rotor d'hélicoptère manœuvré par des ailerons

[@wseucan]

Great RC Magnus effect plane. I didn´t know that this kind can fly so stable.

[@richardpeterson3753]

nicely done. not a lot of folks pull this off with sustainability. it often floats a bit then comes down. this clearly demonstrates sustained flight, and control. it's questionable if this will ever be a viable mode of flight on a large scale lol, but as a hobby craft, this is intreasting

[@TheRattleSnake3145]

looks like the best flying one of these things I have seen.

[@epicrainbowwolfy5709]

such beautiful sound, sounds better than an actual rc plane

[@rcbif101]

EpicRainbow Wolf - the whirring sound is defiantly unique.

[@epicrainbowwolfy5709]

I would like to request that you make more, or even tutorials on making things such as this. If you're familiar with free flight, perhaps some kind of Rubber band powered Magnus plane?

[@rcbif101]

EpicRainbow Wolf - a rubber band one could be cool. Will have to give it thought.

[@ianmathieson65]

It appears from the way the model tips forward in the ground that the C of G is too far forward which probably accounts for the difficulty in getting it to climb. The C of G needs to lie directly above or below the wing shaft to achieve neutral stability in the air. It may even be better to move it slightly behind the wing shaft but this is a matter of trial and error. The easiest way to move the G of G is to move the battery. Adding weight to the tail as an alternative will increase the overall weight requiring more power from the motor. If you move the C of G as suggested, you should find the elevator has more effect. At present the model relies on the motor’s elevated thrust line to keep the nose up and therefore the whole model from dropping. Once the elevator becomes more effective, height can then be controlled either using the elevator or increasing the thrust, assuming the model will them maintain level flight at less the full throttle. Adding a bit of dihedral to the wings will make it more stable by increasing the roll resistance, possibly allowing a more hands-off and relaxing method of control. Hope this helps.

[@rcbif101]

Actually the reason it tips on the ground is just because of the curve of it's belly. The belly curve starts behind the CG, so it tips forward on the ground. The CG is at or near the shaft. Experimentation showed CG best just behind the shaft. I just didnt bother to design it to have landing gear. After more experience and tuning, it actually does fly hand-off as the low slung battery mimics dihedral. Adding rear dihedral would be interesting, but that would require two shafts, stronger bearing carriers, more weight, ect. Also, unless the shafts were linked, one could spin faster than the other which would make uneven lift.

[@ianmathieson65]

Rcbif Many thanks for the update. You’ve confirmed what I expected, that a slightly rearward C of G would be best. Difficult to pinpoint its location in the video which is why I thought it was too far forward. Sorry I got it wrong. Adding an extension to the belly just ahead of the wing shaft would prevent it tipping forward on the ground. Not sure what you mean by rear dihedral. Does the shaft rotate in the fuselage with the wings attached to it or is the shaft fixed with the wings rotating around it? Simple bearing tubes made from a low friction plastic such as polythene or polypropylene should work ok without the weight penalty of metal ball races. Out of interest, have you tried firming the wings into an ‘S’ section as described in my reply to another further below? I’ve seen free-flying cylinders using this shape blade perform well in a good breeze when launched from a roof top. Anyway, glad to hear your tweaking has proved successful and it now flies hands-off. Well done.

[@almorlina]

Wonder if you could modify it for almost a vertical landing. I see a lot of possibilities with super manueverability... Also increase speed by your stopping the cylinders at horizontal.

[@jhiggz9258]

Very cool desigh and execution! I've seen the elevator raised waaay high to get some bite on the commercial FanWing design.

[@bernardscheidle5679]

Saw a video in KZbin a week ago about a "ducted fan wing?" by an inventor with backing from some university in Germany I think. Front Wing were tubes with something spinning inside the tube like a bagless vacuum cleaner. Cargo planes and short takeoffs were advantages. Try fan wing search. Update: Just saw a fan wing EU SOAR distributed propulsion von Karmen institute video that looks like what I saw last week.

[@Leberteich]

I doubt you are really employing the Magnus effect here. The Magnus effect applies to a rotating cylinder or sphere, and only when the vehicle is moving forward w.r.t. air. Your wings are rotating but they are not cylinders. Can you take off vertically with only wings rotating, no prop pulling forward? If so, it is not the Magnus effect generating lift, as this would require forward (horizontal) motion btwn aircraft and air.

[@rcbif101]

This aircraft cannot glide if hand chucked - but only because the wings are low inertia, and the aircraft is high drag. It need ls a constant source of power - as does any magnus effect aircraft. As far as the wings not being a cylinder....what is a cylinder, but a square with "more sides"? After all, from far away, a decagon looks like a circle. If I made the magnus effect aircraft with a decagon, or even hectogon style cylinder and it flew - would it count? Or no, because it still has "sides"? Food for though.

[@CraigLandsberg-lk1ep]

Totally agree, not the Magnus effect which uses drums and skin drag

[@armstronglance]

Maybe some small control flaps on the ends that can be controlled to help stabilize the horizontal axis.run a small cable thru the middle of the wing flaps.

[@FR33D0M_F1GHT3R]

Can I ask you a favor? What is the plane, espacialy wings are made of? I think it`s made of stirofoam or other lightweight plastic. Olso, how fast the flaps spin? I hope you can reply soon anyway very nice plane both at performance and design

[@jameswood6240]

Great video interesting plane thanks!

[@canadianperson4830]

Very cool.

[@indigodragon7129]

Cool! have you ever looked at those integrated rotors on a Russian helichopter? You should design a drone with intergrated. blades. Thr drone could lift heavy stuff. 😊

[@Brandon_Makes_Stuff]

I like the weird cooing kind of sound it makes. Nice work!

[@keithking1985]

it just wouldn't fly without the googley eyes...

[@whatnextjoe]

Very impressive. Thanks for sharing

[@aidanwelly]

woow, amazing 👍..

[@musk-eteer9898]

it's a bird, it's a plane...

[@Abderrahmane_Aitouche]

C'est un hélicoptère avec des gouvernes

[@MrWilliam.Stewart]

Is it a bird, is it a plane, no it's. ... ...

[@TechNed]

Googly eyes! Just hilarious.

[@CraigLandsberg-lk1ep]

U need bigger disks,much bigger than the flap/wing

[@josearnaldopinheirodossant7712]

Beautiful !!!!!!!

[@markvandesande8855]

Elevator is to small to counteract the Magnus effect. They maybe need to be a lot deeper pitch more like breaking flaps? 😁

[@ReevansElectro]

I think that it would also fly if you just fixed the "wing" at a good angle of attack. Try it?

[@Shinshi01]

can you please make tutorial video for making this spinny bird because i really want make it.

[@unalsel2432]

Very Nice!..

[@CaseyHerman]

I am taking a crack at making something similar at the moment. Hope to have it ready for FF.

[@rcbif101]

Casey Herman - cool, we can have a magnus effect flash mob, lol. This one should be back at FF - or perhaps a new revision...

[@isaaclyonsf1]

Flies good!

[@naughtyUphillboy]

You have a subscriber Now.......

[@DrKub007]

no cylinder , no magnus effect ......this doesn t use the magnus effect at all as the "wings" aren t cylinder but rotating flat planks .....

[@rcbif101]

DrKub007 - It is the magnus effect. The magnus effect does not require a perfect sphere or cylinder. Any symmetrical shape can be made to work. Just needs to be able to create a fluid deflection from rotation this changing pressures around the object.

[@OKFrax-ys2op]

I have a kite with the same style wings, if not magnus effect how does it work?

[@M.Hamidi.]

I was wondering the too. Would this still be considered Magnus effect?

[@M.Hamidi.]

@@Ghost8E lmao you replied to the wrong person

[@Ghost8E]

@@OKFrax-ys2op dont know the specifics of your kite but if it is anything like a air plane wing and if the "wings" arent rotating, then it is calle the "bernoulli Effect".

[@hicl5450]

How much total weight of the brid?

[@hakeemharun8177]

Wht if the wings uses conveyor belt?

[@kavorka8855]

it's beautiful it's smart it's amazing

[@lucasfalcon4079]

What would happen if you turn off the throttle mid air? Would it glide down like normal airplane or would it behave differently? Assuming that the wings are still spinning, of course.

[@rcbif101]

Significant loss of forward airspeed, and my guess if high enough, eventually a straight down drop. The worst case is the main rotor slowing, stopping, and then reversing, because when throttle is reapplied, the forces may be too great and the rotors may tear apart. I have been meaning to do an upset recovery video with this aircraft which unfortunately may destroy it, but it will be valuable info for other builders. Stay tuned.

[@itzzzsss]

Cool. Looks like a flying lawnmower

[@rcbif101]

yes, it is very reminiscent of a reel lawn mower.

[@poppycee3616]

Put some landing gear on it, and sell them!! anything that get kids outside in the park doing fun stuff with there folks is great!!!

[@Slider2732]

It has a great flapping action visual at a distance. A stunning 'thing' for the skies :) Am wondering about the 'wing' surface shape to increase lift...have you tried curving the blades or a KFm type ? Perhaps regular wing profiles that work great for lift but badly for inverted, helping the downward to upward transitions. Swappable wings would be an idea for tests.

[@ianmathieson65]

Slider2732 Around 50 to 60 years ago when I was in my teens, I owned a kite sold with the name Revojet. It too used the Magnus effect - the wings were thin plastic sheet formed into an ‘S’ shape with the axis of rotation lying along the centre of the ‘S’. The shaft was made from a single length of thick piano wire bent where it passed through the fuselage to give the wings some dihedral. This greatly helped its roll stability. The whole thing was made from the same thin plastic sheet as the wings to minimise weight. The kite string was attached to the fuselage beneath the wings and it flew extremely well in a wide variety of wind speeds from a gentle breeze upward. When rotating the wings made a loud whirring sound which probably accounted for the name Revojet. The aspect ratio of each wing wing was much higher than in the model in the video - the chord was a much smaller proportion of the wing length. I wish I still had it - it was great fun and was different.

[@terranovarain2183]

Love it that is so cool So only the prop and forward momentum spins the wings?

[@rcbif101]

Yes.

[@decode110]

Great job

[@gabrieldabadie8432]

Hello guys, I'm an engineering student, We are insterested in reproducing the drone you have built. Is it possible to have the measurement of your drone ? Thank you

[@M.SKhan123]

👍👍👍

[@aftershock2222]

That's cool. Looks like a real bird up there.

[@vingoboingo2372]

What if you make a hoverbord using the magus effect to acsend

[@mrsvirtuos772]

Wow! Hello sir what motor did you use between the spinning planks?

[@mroger29sh]

mark r pa usa did u design this ur did someone else sorry but this is insanely awesome . please who thought about this aero dynamic ?

[@garywardsr.4719]

how did you determine the cg ? nice job on the build

[@siriussotis2986]

Cool!!!

[@araujovirtual]

Parabéns , o próprio passarinho.

[@mjreyes4979]

what kind of material did you use

[@EMORY1977]

EXEMPLARY!

[@terrycollins2935]

Hi,how about useing two independant motors to drive the padels and increase the size of the tail and elevator ? just a thought, regards Terry

[@rcbif101]

If by "drive the paddle" you mean by air, I think the model could benefit from another propeller motor. If you mean drive them mechanically like being hooked up directly - I'm not sure the extra weight would be worth the extra paddle speed, but it is hard to say. If you do drive the paddles mechanically and much faster, you have to be sure the paddles are very balances, or else the high speeds may cause too much vibrations. If building lightweight, the tail could defiantly benefit from being larger, but for this model, it may be too much weight unless I change something to make it more efficient.

[@terrycollins2935]

Hi to counteract the balance how about lengthening the body and fitting fins on either side of the tail to help stability,regards Terry.

[@mydiscovery7924]

Nice bro

[@diecastmodsrc8492]

can you make flying car with this ..?

[@juanedoses8715]

that would make a fantastic drone! how far do you think it could fly?

[@rcbif101]

Not too far. It isn't very efficient. Just a novelty.

[@araofitz]

Is there a second motor that rotates the magnus 'flaps'?

[@rcbif101]

no.

[@curiexr8292]

Would a full cylinder (hollow) be more efficient than the open rotating style flap that you have in this one? Most wings I saw using this effect were full hollow cylinders. Thanks

[@rcbif101]

My guess would be no. It would weigh more to begin with, and then require a motor to spin it adding even more weight. This style self rotates once it gets going. I have to imagine the scoop like flaps on mine generate more negative pressure that the surface boundary of a cylinder could. I'm actually working on a new design now that will debut at Flite Fest 2019.

[@curiexr8292]

@@rcbif101 Good info, thanks. I'm also planning to experiment with this, I think I'll try to use the flap style like yours but cut out the inner section, so that I would essentially have 2 smaller scoops on the outer perimeter of the cylinder at a slight angle, similar to the FanWing but with fewer scoops. It will look more like a harvester but might be more functional than a complete hollow cylinder.

[@rcbif101]

@@curiexr8292 I also learned the prop washed powered paddles may not be the best idea. If I redesigned this bird, I would aim for maybe only 5% of the prop overlapping the paddle. My newest mag model, the prop wash does not touch the paddle at all. Using angled fingers/tabs, forward airspeed alone can self start the flaps spinning. I tried a variation with each flap panel angled 30deg in the middle to form a crude "S" or impeller shape, but for some reason it was very unstable. Did not fly.

[@curiexr8292]

@@rcbif101 I'm surprised that the prop wash isnt helping, actually I thought that the way you positioned the motor would benefit the magnus effect, as compared to some other motor configurations I've seen that actually work against the effect. I was just disappointed that I couldnt find more information about lift/drag differences between various configurations like flap peddles/tabs/complete hollow cylinders etc. Guess we are the few crazy ones haha. Most studies I found only dealt with cylinders.

[@rcbif101]

@@curiexr8292 with a hotter motor it may help, but with the slow, torquey dt750, I have a feeling the slow prop pitch speed was impacting the flap rotation speed.

[@Abderrahmane_Aitouche]

Les ailes supporte l'hélice hélico

[@238Hero238]

Sounds like a damn hovercraft or something, lol

[@santi4334]

buena mijo

[@FalloutNewNarwhal]

Title says Spinny Bird, first words in the video are "This is Flappy Bird" ?

[@rcbif101]

Mentioned it in annotations which youtube apparently removed.

[@user-zh1tw2gc9s]

проклятые ученые пара уходить от калес с вами или без вас скора калеса уйдут )))

[@mjt106]

Top

[@darrellhambley7245]

Amazing. How does it keep from getting pitched down? It seems that there would be a lot of torque from both the magnus wing and the prop itself, both trying to pitch the nose down. The horz-stabilizer can compensate for all that?

[@rcbif101]

The Magnus wing is free spinning so there is no torque, but there is a moment arm caused by the drag of the magnus wing and the motor being higher above wing centerline. So you are correct, the model does want to pitch down some. The solution was considerable positive motor thrust angle (motor pointed upward maybe 15 deg), so that some of the propwash hits the horizontal stabalizer, pushing the tail down, thus rotating the nose back up. This results in overall inefficiencies (along with the design of some of the propwash hitting the magnus wing for auto-start), but it works. My new design for this year has the motor below the wing. I lose the advantage of prop-wash autostarting the wing, but my prototype now climbs like a homesick angel at only 1/2 throttle.

[@yuniorprades3023]

I have a prototype yes this way is actualy tge real way birds muve wings

[@CUBETechie]

What if wings are wave shaped? Would something changes?

[@abhimanyu.g5287]

Im asking how to make

[@ddingus2254]

lots of how to....gets at it at 5:20......your welcome

[@alexsmits1960]

explain magnus effect?

[@rcbif101]

Do a youtube search for it and watch the video by Veritasium. They can explain it better than me.

[@jasmijnariel]

Too bad magnus planes are very unstable in flight

[@rcbif101]

My latest design is very stable. It is as easy to fly as a 2ch trainer plane.

[@jasmijnariel]

@@rcbif101 but no video of that one?

[@rcbif101]

@@jasmijnariel - coming soon once I have time and the weather cooperates.

[@guglielmodicarlo4139]

dont get it? why not just use a regular wing?

[@rcbif101]

- because there are million of models that do. Only a handful however have built one to fly with the magnus effect. Dare to be different ;)

[@johnhardman3]

Just to be different, I guess: I'll bet they're still working to perfect a "full-size" plane that uses this wing-design.

[@soullessone4681]

thats not the same as hallow cups i dont see this being successful

[@pat14162]

C'est quoi encore cette connerie ? n'importe quoi !!! on ne sait plus quoi inventer comme imbécillité

[@pratapmandal.6425]

Indians like here. 👇👇👇