Single Rotor Blade Helicopter. (Experiment)

[fuck1fuck2fuck3me]

haha f**k realty

[jjpl2001email]

WOW!!! but i think it can't hover no? I think it needs some speed to control the wind with the tail wing, or am I wrong?. Great video... its fun I study phisics and I was thinkin that you were wrong until I saw this video... great!

[RienVesseur]

Great video. Love the experiments. I've often thought that if a maple seed can fly with one blade, why not a helicopter. What I don't understand is how it can steer without tail rotor. Anyone care to explain? Much obliged.

[pospalte]

i domt get it ... how does it work without rudder

[danne6a]

holy shit

[nz3rdsqr]

to my knowledge this wouldnt work full scale the vibration would be intence not because of mass imbalance but due to asymmetric blade effect and that the rotor blade is producing a lot of of center lift this is usually dampened by the opposing rotor to some degree but as speed increases this usually decreases creating a larger off balance in thrust as the into wind rotor has a higher speed than the downwind blade

[sootydave1]

Awesome Dave just Awesome.

[TheBeladog]

When I think of all the half broken props and blades I have tossed in the bin...ARGHHHH

really nice work. Very cool!

[Culturealimprovement]

go to 2:30 to skip the bull....

[lazarra101]

I like this dude, he makes it seem like your never too hold to be playin with rc heli's.

[warpmarc]

Dave is the man ! , plus hes very stressreleaving . . .

[lynlrp]

amazing.



[raceman73200]

Dave you inspire us thanks you crazy dude !!

[cessna815]

I wonder if one blade would work on a full scale helicopter like the R-22

[quickguesswho]

Thats cool but I I think it looks better to have both blades.

[C4ITA]

Did you use a gyro for the tail? Do you think it is possible to make it hover by putting under the airflow a command like a vertical flap under the tail?

[ap0lmc]

Good luck Dave you are a genius! Hope you can make some money on this.

[britinozoz]

G'day Dave . Very good review.I remember many years ago these models being available but unfortunately I never got to see one.You would have to think in this day and age a model like this with a brushless set up and a throttle would be a good line to market. I have been looking on Ebay ,with no luck Happy Landings Chris.........

[MisterNifty]

This is a great American. I bet we have lots of these guys around who can't do anything because our nation has become a legitimocracy of counterfeiting lawyers.

[luismon2005]

Hi Dave! How heavy should be the counter weight? The same weight as the missing blade?

Thanks

[NameWasInvalid]

Fixed pitch?

[TahoeMtnMan]

For airplanes or fixed pitch helis I wonder if you could use a higher pitched single blade of equal length to the original two blade version?

[TahoeMtnMan]

I wonder if you could use a higher pitched single blade of equal length to the original two blade version?

[420ampd]

H ey Dave i am Kris Bruce. I am from athens Ohio,i love your videos, i never miss an episode. You are the king of RC as far as im concerned. You allways have the most interesting videos and they are allways very infomative. Keep the videoes coming or i will be devestated. I would love to meet and fly with you sometime. If your ever in Ohio drop me an E-mail bkris53@yahoo.com and we will get together. thanks again Dave your the BEST.

[MrZync]

Hi Dave, Well Done! I have always been fond of your Hyperfly and have one that I fly quite often. As for the engineering behind it, do a web search on the Everel propeller. There is a pdf file that details what is happening fairly well.

The Everel single bladed propeller dates from 1937. Interestingly, the center of pressure shifts from the hub to the center of areodynamic pressure on the blade. See the pdf for details.

Hope this helps.

Mr. Zync

[janjan215]

Hey Dave I had a question for you about what a good helicopter would be within a decent price range. I currently have the Blade Msr and The Exceed Rc Warhawk 300 Police and i wanted your expert advice on what i should get next that would be around the same price range and also a good quality heli. Can you help me out? Thanks, Jon

[ronatoju]

Hi. how about for ccpm 450's?

[kingkingkalle]

CRAZY

[baileythedudeman57]

take this to a rc fly in thing with a lot of people there and dont let them see your heli with blades not spinning until you land

[macdaddy1600]

i can fly can you nightflyyer is far far from the best pilot

[macdaddy1600]

THIS GUY GOT TO MUCH TIME ON HIS HANDS GET A LIFE

[josephagp]

@macdaddy1600 srfu noob he's better than you'll ever be.

[damagedgoods1975]

@macdaddy1600 Retired US Marine...Show some respect!

[outbackjack1974]

So this only will fly forwards right? No hovering, or Backwards, sideways flight.

[dansweazen]

I flew a Kavan Jet Ranger fully controllable 5 channel RC helicopter with one main blade back in about 1975. I had lots of un matched blades so I added a weight to the empty blade grip and flew it with one blade a lot!

[MrGamingAddicted]

Nice!!!

[Tretboot]

I would have not thought that this was possible... amazing!

[TimmyEriksson]

how can the other prop make turbulanse when the plane, or heli is moving??

sorry for my bad english.

[ArionRaine]

Guys, dont give this guy too much credit for this stuff. It has been done time and again. There are full scale helis that have used this single rotor blade concept, and other it has been done with RC as well!!! Same goes for single blade airplane props!!!

[krustyda]

How can you control the yaw rotation if there isn't a tail rotor?

[BladeKiter]

Amazing

You have any advantage features for controll in the air, with this setup?

And why you can fly less tail blades?

[KozmykJ]

Keep making those great videos Dave. Long live the spirit of experimentation. Don't know how far patenting will go though. Google brought this up first page :- freepatentsonline.c_o_m/661958­5.h_t_m_l . Also Ber60beltcp's Channel in Belgium went single bladed in 2009 but hey!, it's all good clean fun.

[tomterahedrob]

would a one bladed autogyro work just as well?

[NightFlyyer]

@tomterahedrob No.

[tomterahedrob]

@NightFlyyer Thanks for posting this great proof of concept.Why would it not fly as well as agyrocopter? I was thinking of making a one bladed (hinged)gyrokite.Thanks

[Silverexpress01]

This is just awesome. I'm eager to try it on my micros. Thanks for sharing!

[TheWingflyer]

Cool man. I wish I had your job.

[Ispintechno1]

Could you make the counterweight lighter by moving it farther away from the center? Maybe this could work with the MSR. Maybe it would save even more energy?

[NightFlyyer]

@Ispintechno1 The further you move it away, the heavier it will get.

[Ispintechno1]

@NightFlyyer Correct, and you are using less weight!

[Insomniac535]

@NightFlyyer

Hang on... I'm sure you would require a smaller counterweight if you move it further from the center of the rotor disk... Of course, the longer supports may end up adding extra weight in the end, but I'm pretty sure what you just said is backwards. Cool experiment!

[pommesschranke2]

@NightFlyyer  are you sure ? my blade is 15g, my counter weight is 29g

[pommesschranke2]

@NightFlyyer

[TR4351]

@NightFlyyer surely not?? Turning moment ("balance" required by other blade) = force (the mass of the weight) x distance from the pivot, therefore the further away from the pivot (heli's head), the smaller the weight will need to be, hence why so little force is required to undo a bolt with a long wrench, but a lot is needed if the wrench is short to undo the same bolt. Great video by the way.

[ircmaxell]

@NightFlyyer You don't understand basic physics, do you? It's all about the moment of inertia. So the further it moves out, the lighter the weight needs to be due to the relation I = mr^2. So since the radius is increased, mass needs to decrease (by a stronger factor) to maintain a constant moment of inertia.

The only benefit to moving it further out would be an overall decrease in mass. The moment of inertia will stay the same (which creates the balance).

[lolziloveminecraft]

@NightFlyyer what he means (i think) is decrease the balance weight and move it farther away from rotor holder thing

[TheArfdog]

@NightFlyyer Sorry this is not correct. The further out the counterweight is moved, the more centripetal force it creates because it is moving at a faster speed. Therefore yes, a lighter counterweight can be moved outward to balance.

[extraflyer1]

@NightFlyyer I think he means that by moving the weight away from the center of the blades the overal mass of the counterweight could be reduced therefore making a lighter heli.

[tomterahedrob]

in 1958 MBB came out with the bo 103 ,even the tail rotor was one bladed.kudos!

[Alexvideoclip]

I don't see the tail rotor !

:o)

[NightFlyyer]

@Alexvideoclip There is none

[raj0530]

Thanks for all your test videos on anything that flies i guess.i have watch several. I just dug out my Apache hyper fly from the 90's and found it to be in good shape. Never had much fun or luck flying the thing, mostly to heavy not enough power. What mods do you suggest to liven this apache up. I was shocked to find out you invented these. I am also shocked they will fly one on rotor blade, just shows your a Genius!

[RCFlyer132]

@raj0530 Get a new lipo battery insteed of the old heavy battery that came with it?? :)

[violinbubi]

@NightFlyyer

does it have a balance weight on the other side of the rotor blade where the other blade used to be ?

how does it work without tail rotor ?

greets from germany

[shield400]

Amazing! Who'd a thunk it!?

[joehandsome99]

...

Great job.

I like this video very much.

Thumbs Up ~ Eric

[bloodhound122]

well i wouldn't of believed it if i didn't see it, coming from Missouri lol well show us you did and did it well great video and experiment Dave.

[Gig540]

Dave that is to cool! I remember reading about this and using with planes for more speed. Was a big article on it and was interesting. This right here though is a whole different level to cool!.

Okay so I guess now a test or Turbulance would be to try it out on a two bladed boat lol. Water is sticky with drag so that would be a good test there.if it would work. Nice job as always!

[funkchild75]

Cool video Sir. Thanks.

[funkchild75]

Cool. So :0)

[exiledconnections]

oh my stars thats AMAZING leave it to dave wow really wow

[goastdoggg]

I don't know if anyone asked already. But did you have to use a longer blade like with the airplane?

Amazing stuff Dave I would have never thought.

[xxmarkpipxx]

Nice 1 dave

[puggster]

wow

awesome,

i think the biggest challenge is offsetting the weight from the oposit blade, but yeah ive read a few articles on single bladed props/rotor systems that there actualy more efficent as you said there is no ripple in the air from the other blade so should be smoother

anyways nice work, i love your crazy experements, thats how technology advances due to this stuff from guys like you :)

[g0fvt]

Excellent and thought provoking experiment, I wonder how well a motorised glider would work with a single large bladed prop? Probably would need geared reduction from the motor but may offer mad efficiency due to lack of "slip" and drag reduction.

would be interesting to see what flight durations you could achieve....

Once again well done!

[sickler4201]

WOW...that's awesome! Bet you wish you tried that sooner! Good luck on the patents. It flies (and dang close to hovers) awesome! Keep up the excellent vids Dave!

[avi8torace]

That is amazing! Nice landing, just like a plane!

[hl2vshalo2]

not supprised. as long as its balanced it will work.

[jsnhart]

wow dave.. really cool!

[oakland002]

Hey Dave , you might already know this but on the remote controller, if you push the throttle adjust thing (tweak control) all the way up while the throttle is still at the down position, your air craft will start on it's own without any throttle , then if you push the throttle control up it's like a massive power boost.

Maybe you already know that but just my 2 cent for others out there.

[kydawg1]

Awesome....Love your Videos. Nice work on such a unique rotary wing....truly singular rotary WING.

[covertyankee]

Before you made this video you should have went to different people in the hobby and bet them a thousand dollars this would work. I would have lost! It is hard to believe.

[BrainyBoy7]

How in the world do you come up with these ideas?!

[justfly60482]

wow can this be done on a full scale chopper? and will this work on ducted fan units?

great job and flying

[vortecroush]

do a wind tunnel test,,,,1 blade vs 2 blades. lets see the turbulence :)

[manuelbeltranmeza]

Sorry but i don´t know how this fly...

saludos desde Mexico.

[TraxxasRCFreak]

WOW...... Thats just plain amazing Dave!!!!! Thats soo crazy, nice experiment! =)

[BeaMeUpMrScott]

WOW!!! Dave...awesome... just awesome!

Who'd a thunk it eh?

[johncirri]

Great Dave, How did you do the counter weight for this.

[skiingany1]

just when you think you have seen it all. great job!!!!!!!!!!!! YOU ARE THE MAN

[ramis182]

That is amazing, i still find it amazing that this works! amazing video and great job. That was really nice. But what i still don't get is: if the aircraft fly more efficiently on one blade, why are there two?!?!? I mean why don't the manufacturers just do that from the start?

[catfishmudflap]

Wow. Amazing. Your videos are always great fun. Thank you.

[mrbuki77]

Do you think that this would also work on larger models...or real helis and planes?

[MrBillTroop73]

Thumb's up!

[suvyMan2007]

try that with the blade 400

[ivanchantt]

Simply awesome.

[andrewsmc]

Dave, That was beautiful!

[birdmanbl]

Man I can't believe that you answered my email twice. Thanks Dave, I know how many people are interested in your projects. Keep it up Teacher! Bye for now

[RealMash]

Hi Dave!

Please bear with me-what about the Bearings?

Even though you balanced it -statically- isn't there a lot of dynamic stress coming from flying it and using the pitch that is increased by it not beaing aerodynamically balanced?

Just a thought, might be wrong. Nevertheless, nice concept;-)

Cheers,

Michael

[NightFlyyer]

@RealMash Maybe so, but It is hard to argue with success. Ill keep my eye on the bearings, but this is way smoother than 2 blades, so it is at least a constant pull. Thanks.

[Arkferret]

How bout trying a single rotor blade, single tail rotor blade next?

[RamosDa81]

Awesome. Does this system work in a coaxial helicopter?

[michaeld747]

Dave, are you going to try single rotor with CCPM?? I'd love to see that with some 3D manuvers!!

[NightFlyyer]

@michaeld747 Coming.

[timothyrbates79]

@NightFlyyer seeing is believing but how on earth is this possible dave??

[timothyrbates79]

@michaeld747 seeing is believing but how on earth is this possible??

[michaeld747]

@timothyrbates79 It's just a matter of balance and the fact that one less blade produces less drag, however, you will lose lift so I'm curious as to how a CCPM Single blade machine would handle 3D, if at all.

[NightFlyyer]

@michaeld747 I only see an increase in perfomance not less. IT easily flies in 3 directions. and if you want loops etc, then stay tuned. I am waiting for weather.

[michaeld747]

Hey, you never know, single rotor/prop concept may take off in the market! No pun intended. I enjoy your videos Dave, keep up the great work!

[michaeld747]

Hey, you never know, single rotor/prop concept may take off in the market! No pun intentded. I enjoy your videos Dave, keep up the great work!

[bearinstincts]

Hey Brother..... no surprise to me that you could fly this without a tail rotor! Awesome video! Sis

[NightFlyyer]

@Silverlyx Thanks. I never saw it. This was simply my progression from the one bladed airplane prop. Did he use a tail rotor or the hard way without one?

[Silverlyx]

@NightFlyyer Lol, Nope he did it the easy way with the tail rotor !.. Still all good fun a use for those odd blades lying around !

[spektrum33]

Well i would not have said that this would have worked >>??? but i stand corrected

{+_+}

[stot2614]

This is what we need more of... innovation and capitalism. They go hand-in-hand. I really hope that you are able to sell this new concept. Good luck, Dave!

[Malivictus]

thanks just amazing think of UAV's or better yet next Gen helis that the Army could build with this in mind I understand that it is just a model BUT it is based of the principles of a Real heli I can just see the Stealth of some helis with that 1 blade Idea

[minfinger]

That's nuts, great video!

[startazz]

I've seen this done before Dave but with a Belt CP about a year ago and the bloke had great success ;-) i'll send you a link in a PM ok ;-) but great job with this heli = thumbs up.

[CH0Rigi]

so, why do we put 4 blades on our helicopters? I mean if this works why should someone even think of putting for on?

[connickjoseph]

I AM TRULY AMAZED, IT DEFIES A LOT OF COCEPTS, WELL DONE MY FRIEND.......CAJUN JOE CONNICK

[redflyier1993]

do you think in time, this could be applied to a actual helicopter? amazing vid :)

[NightFlyyer]

@redflyier1993 Well, since I tried something outrageous and so far in left field that no one would believe it would have worked, so maybe the Manufacturers may study the idea. I hope so. And I hope it is made here in USA,. 'cause we could use the Jobs.

[CJVideoProductions]

I saw another one blade heli on youtube. Search for "Dragonus Single Blade Rotor" That one really seemed to fly well too! It was collective a pitch heli. I love the combination of the one blade and the Hyeperfly's no tail rotor. Pretty cool!

[NightFlyyer]

@CJVideoProductions Thanks kindly. I appreciate your comments.

[extremesniperdx]

Wow in your vid when you did that on a plane i comment Does it work on a helicopter? and you did a vid!

[NightFlyyer]

@extremesniperdx It had been on my mind too. Several others asked also but I think you were first, so thanks for the inspiration.

[MultiNAZIzombies]

omg thats strawsome strange and awsome

[NightFlyyer]

@MultiNAZIzombies Thanks kindly.

[robojot]

awesome dave :D ceep them cooming !

[NightFlyyer]

@robojot Thanks very kindly. I will try.

[nishbrown]

OK, now ride your bike with only one wheel.

lol

[NightFlyyer]

@nishbrown Haha. Naw, too many people already have done that. LOL :-)

[Venom3761]

This is Amazing, Great Job!! :)

[NightFlyyer]

@Venom3761 Thanks very much

[flyingchimp99]

try an mcx with 1 blade cut off the top and the bottom i dont think it will work though cuz the bottom will have interfirence with the top

[NightFlyyer]

@flyingchimp99 Been thinking about that too. Only way is to try, right.

[Berijs]

think u just invented something for the mass produce , thumbs up for THE Dave Herbert!

[NightFlyyer]

@Berijs Thanks so very kindly. I appreciate your comments.

[beverke7]

excellent test result, I will keep my broken props and blades for sure now ! LOL

[NightFlyyer]

@beverke7 Thanks very kindly. I'm with you. I am now saving any broken props too.

[TOMOFONO]

Can you do a review on the Air Hogs Osprey? I saw it in the store today!

[NightFlyyer]

@TOMOFONO Do you mean Switchblade? I haven't seen the Osprey yet. I'll keep an eye out.

[zinkfv61]

Another amazing video! Thanks Dave.

[thehilitereel]

Chances are this has happened.. But only by accident, like something came loose and the propeller flew off, but nothing ever came of it.

But I guess you are the innovator.

[NightFlyyer]

@thehilitereel Yes, the blade could fly off my lawnmower too, so I make it way more stronger than needed. The weights are simply washers bolted on, and cant come off. As long as it is smooth, nothing should fly off....Thanks.

[SvenOkonomi]

The reason this is rarely used is lateral torque. The one blade will want to push up, and through leverage it will put a terrible strain on axle and bearings. Small helis like this dont notice it as much, but dont attempt this on a 450 or youll be in a whole new level of hell. :')

[NightFlyyer]

@SvenOkonomi Good point The stress on the small helis, since the blade is balanced, does not seem to affect the bearings or power at all, possibly due to the flexible blade holders. I do not expect my bearings will fail. Windmills have the highest bearing failures Ive heard, so If they can make bearings that will work (all real helis have high time on their bearings and are regularly changed, so I do not think it would be impossible to design something to work, especially for the benefits.

[SvenOkonomi]

@NightFlyyer That would be a sight to behold, a single bladed army helicopter, imagine how stealth they could be with only one blade.

[tjtg]

Still a pioneer of the hobby all these years later. Thanks for sharing Dave, this is a great experiment !!

[NightFlyyer]

@tjtg Thanks so very kindly for your comments.

[taofledermaus]

This is stunning! If this video doesn't get millions of views.... I dont think anyone has ever tried this before.

[NightFlyyer]

@taofledermaus Thanks so very much. I appreciate your comments.

[hellsrage619]

WOW thats genius now we just need one crazy pilot to try this in a real heli.

[NightFlyyer]

@hellsrage619 I'll do it.

[hmpeter]

Impressive!

In the late 90s I saw an experimental single bladed wind turbine at university and thought it would be cool to build a similar propeller since then. But I am not that good at model making.

Great work and video!

[NightFlyyer]

@hmpeter Thanks so very kindly for your comments.

[NightFlyyer]

@lordkesil Easy. Send me the heli.

[rele30]

holy heck that is awesome, wasn't sure it would work.. but WOW! Excellent work. gonna link to this in our Club newsletter in Nov.

[NightFlyyer]

@rele30 Thanks very kindly sir. I appreciate that. Say hello to your club, for they were kind to me when Jeff and I visited.

[JollySwagman2006]

Nice Flting Dave, and on One blade too, simply ingenious ,

[NightFlyyer]

@JollySwagman2006 Thanks very much. I appreciate that.

[shoado]

In a phrase....Your the man Dave, cant believe the things u have been showing us lately u r truly stepping outside the box on these ideas. Well done BRAVO! and im with ifish, absolutely on ur side hahaha.

[NightFlyyer]

@shoado Your comments are very kind and I appreciate them. Your right, I have found out there is way more room outside the box for sure.

[roberttreboranita]

good job Dave! i knew that if it were going to work you would make it work! Great vid.

[NightFlyyer]

@roberttreboranita Gosh, I appreciate your comments. It was fun to try....and especially succeed with an idea that everyone thought was bizarre.

[WhiteLightning1220]

Oh My God! It actually Works!!

[sirnubenegra]

how about a 6ch?

[NightFlyyer]

@sirnubenegra Should be no difference and actually easier, since this Hyperfly is the same size as my Blade 400 and heavier, thus making it the better test bed.



[zcxvasdfqwer1234]

Oh yeah!

[Delaypat]

That is sooo awesome!!