Helicopter Physics Series - #2 Chopper Control - Smarter Every Day 46
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- Опубликовано: 27 авг 2024
- Tweet @SmarterRUclips . I would appreciate it if you share this by clicking here: on. Choppe... . Trust me, there's more to Chopper Physics than you think. Read this page to learn more: en.wikipedia.or...
will be releasing the videos at the end of the video over the next few weeks.
The wizard pilot is Carl Groover www.carlgroover...
Carl Flies for the Curtis Youngblood team bit.ly/w2ATpl
Carl's RUclips channel is here: bit.ly/yqgP12
Outro music "Polecat" created by "A Shell In The Pit" Get it here: bit.ly/SED_Album
Sarah Xu created the awesome time-lapse intro.
And the helmet? Thanks Will! I'm glad you also have a melon head!
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People have asked about the Da Vinci Book
Dewey Decimal system: 608.7 COO "The Inventions of Leonardo Da Vinci" Magaret Cooper
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Comments of interest:
This is the second video in the series. Click here to see the introduction:
• Helicopter Physics Ser...
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The series is working. I'm hoping you learn several things each video, and ask awesome questions like you just did. That topic is going to be a whole video, and the answer will blow your mind. I know it blew mine!
That man talking about the helicopters his eyes were like I am going to stare into you soul
thats was my first thought
EngSpringSpan Ikr
EngSpringSpan he looks super scared
I must be looking at a different video. I dont see scared or staring into my soul.
😂😂😂
Collective pitch = W(up) and S(down)
Cyclic pitch = Arrow keys (direction of tilting)
Anti Torque = Q(left) and E(right)
Yep, learned it all in GTA San Andreas
faking genius dude (y)
I didn't understand :(
Directions not clear, kite stuck in neighbor's tree
Bayezidh Tanu his keyboard
This is a much simpler and easier way to understand it, thanks!
The way he controlled that helicopter made it look like a dragonfly's movements.
The guy from the Smithsonian looks absolutely terrified.
+Soulless Ginger
You're going to explain how choppers work, and you're gonna ENJOY IT!
+ZeD More like "Explain Helicopters or your wife dies."
Oh my gosh he should be a meme!
Soulless Ginger m
what the flip!!! that piloting at the end was crazy!
I've been a big aviation buff for a long time so I mean this as a big compliment when I say your quick, simple visual explanation for how all of the controls work was an easier explanation than I've ever seen or read. Bravo!
Lead-lag hinges are on semi-rigid rotor systems. The terms you're learning about refer to "hunting". You're getting into very complicated aerodynamics, which is AWESOME.
80 hours of ground school and this blew my mind. Toy helicopters need to be implemented in the commercial course. Top gun high fives for your youtube wizardry
Watching that little RC helicopter fly, all I could think about were dragonflies. Very erratic, very agile, and yet very precise.
lol, great minds think alike :)).
I wonder if that could be possible with a real size heli, but even if it is i think the pilot would take a hit if on board.
To be able to make those maneuvers without losing control, I think the whole craft would undergo g-forces too strong for the pilot to withstand, let alone the craft itself.
Denver Eduard yes and no, aerodynamics work differently at bigger scales. And also, the pilot G force issue as u mentioned
This is possibly the best channel on RUclips, it doesn't even feel like learning something because it's fun to watch, it's just a bonus that you learn something as you are watching the fun video if that makes sense. Keep up the great work!!!!
I apologize for the hig gyration during the flip at the beginning. Not sure what I was thinking there....
Many larger liquid rocket engines have something called "Thrust Vector Control" or TVC. The entire nozzle can articulate, thus producing a thrust vector that is off axis from the rocket itself. The mechanism is similar to those little linkages in a gorilla pod, except usually there are two linear actuators which control the direction of the nozzle gimbaling. By the way, an ideal rocket nozzle will expand the gasses to atmospheric pressure by the time it exits the nozzle bell.
Wow, I had no idea a helicopter blade was so complicated or adjustable, or that it never changes speed in flight. Keep blowing my mind Destin! Thanks!
I fly RC helicopters and I make videos on how to fix cars. I LOVE THIS SERIES!
Noice
Do you like rc helicopter with a fly bar or without a fly bar
@@minepaperstudio5683 flybarless is cooler
Congratulations! The next few videos should be very interesting to you. I recommend paying close attention during the "why you don't need a parachute" video.
If the helicopter is designed for this type of flight, it would certainly be possible. Watch the next video and we'll discuss upside down flight with the use of high speed video for analysis.
Pitch is the change in angle of attack of the bade. As it goes around it takes more, or less of "a bite" of the air.
Good suggestion. We thought hard about that, but the forces involved could damage this very expensive helicopter.
That guy at 1:01 drank WAY too much coffee that day. LoL
@Maaartah (note that I have not watched the video) When the rotor spins the air doesn't just go straight, if also goes outward and in a circle around the helicopter. The air spinning around the helicopter creates the opposite effect of the helicopter spinning. That's why the back prop is always spinning(to compensate for this effect) when the main rotor changes speed the back rotor needs to change speed as well. Hope that answers your question.
4:06 OH GOD WHAT IS THAT.
3D flying. it's a style. I do it too.
*magic*
KpilotRCHelis Looks like the chopper was on drugs
SAME REACTION xD
Kothan Guzman Hahahahaa
I got it from my local library (libraries are like the internet only you can smell the books) Dewey Decimal system: 608.7 COO "The Inventions of Leonardo Da Vinci" Magaret Cooper
I posed the question hoping you would think about it. The answer you seek will be revealed in due time.
3 years after this series was uploaded and I'm getting smarter everyday trying to learn how to build better helis in Besiege, lol. The physics are amazing but Besiege doesn't allow such fine designs so you've got to fudge it a bit. =P
+The SilentCaay Channel Well technically maybe if you went into a bigger scale it MIGHT be possible, just not not very good because the rotor blades can't scale alongside it, only the rotor itself, basically adding weight on top of the very little lift you already had. Unless you use a steering block to turn the propellers, that could be useful for controlling lift,
The SilentCaapy Channel c ce
Same here. Im also doing it in a game called Plane Crazy. its on roblox but isnt autism
hahahaha "how you doing mr. ledbetter?" "i'm richard ledbetter" hahaha...dude..he said hi..
+alex hernandez I swear I thought he said he was ETHAN BRADBERRY!!!
Wow I've never seen such agility from a machine, that's incredible.
I aim to please. Thanks for trusting me with your subscription.
Love this series! It would have been cool if you guys attached a camera to the end of one of the blades as you were rotating them slowly to display collective and cyclic pitch. The camera would tilt at an angle relative to the horizon, depicting the angle imparted on the blades by the swashplate adjustments. This would have been especially useful for displaying the cyclic pitch because the camera would tilt at a different angle relative to the horizon depending on the blades position around the central rotor.
How these helicopters work makes perfect sense to me, now. But I'm STILL blown away by the fact that cyclic pitch changes the angles of both blades in unison every rotation... that's so fast...
04:06 was somehow so hilarious for me XD
The helicopter is possessed. That scene doesn't appear to physics. lol looks fake
Now my interests in everything RC and everyday science converge on Destin's channel. Awesome coverage of helis, Destin. KUTGW and Thumbs up!
I'm a Mechanical engineering student in Sweden, these videos are just awesome!
There are 3 ways we make helicopters stop "drifting" also called translating tendency. 1) pilot input 2) cyclic rigging 3) An offset rotor mast. The question was never really answered in the video.
You guys rock! My life honestly revolves around helicopters. It's such a treat to know you'll be working on this series over the next few weeks! I hope to be a pilot one day, and while I already know most of the content you've uploaded, it's great to get a refresher and see people getting excited about rotorcraft!
Keep it up! And make those videos as longer!!!
Destin is my alter-ego in America
If you want to help me make a Spanish version we'll publish it on my other channel, "FunnerEveryDay".
I already knew this from my RC Helicopters but I still felt like I learned something. Especially how the swash plate works that's so awesome.
That spiral rotor was so awesome, but even as a kid I thought "damn that thing must be spinning way too fast for it to lift all that wood"!!!!!!
angle of attack is the angle between the relative wind and the chord line (the rotor blade) pitch angle is the angle between the horizon and the chord line. angle of attack is decreased as airspeed increases because of the horizontal component of lift
Summing up:
Collective lever: thust magnitude change
Cyclic lever: Thrust direction / pitch change
all this years this is the channel i was looking for... answers to so many questions
Omg thanks for the tail rotor 'stop spinning' thing I can now fix my heli that I made. Thank you!
@Dialga355 In this series the diagram or animation is the toy helicopter. It makes it easier to show you what they are talking about on large ones.
i tell you what, i work on airplanes for a living, and this blew me away. smarter every day!! love it man, keep it up!!!
wow. helicopters are truly amazing machines. i had somewhat of an idea how it all worked but this video showed just how complex these things are. it's pretty cool. thanks for the video.
ive seen that guy do crazy stuff with his helicopter, and it still doesn't fully make sense how thats possible, thats amazing
So, I finally got around to it. I emailed the owner of my local helicopter flight school and asked him if helicopters use negative collective during autorotations. I also emailed robinson to ask their techies about it. They both said the same thing: that real helicopters enter an auto with neutral pitch (no lift) and then raise the collective to avoid rotor RPM overspeed. Keep in mind this is a robinson, so it could be different elsewhere.
@Dialga355 Animations are on the way. Sarah Xu (who drew the intro helicopter) is on board to start some hand-drawn animations once her course load at Vancouver Film School lightens up in a few months. Improving production is expensive, and a large reason this series has remained so good has been by limiting advertising which might negatively affect the program. All in due time.
At 3:04 if you look closely, it looks like the the rudder system isn't dynamically stable (i.e. wants to go or "spring" back to its original position when the rudder stick is centered). That's really interesting. So the heli will continue to yaw until you come all the way back across to the the other side of the stick...wow, it really does take skill to fly that well. My little heli has a contant pitch tail rotor which will change speed instantaneously as you move rudder left and right. Cool
This is how it's supposed to be taught, totally simple and neat. keep up the good work, thanks a lot Destin
Warm air rises because it is less dense than cold air. Water is the most awesome liquid in all of creation because it will contract like most substances as it gets colder... UNTIL it gets down to 4 degrees Centigrade. At this point it EXPANDS, meaning ice is less dense than ice water, therefore it floats. This is why we have icebergs and floating ice. Imagine if ice sunk? I wonder if the poles would cool down from the bottom and become totally frozen? Fish would die. Floating ice is critical.
StarWolf watched this.
Destin, your friend's helicopter skills are making the dragonflies jealous!
its either shock or information overload but all i can physically say is "i want one"
ever since i started watching (and subscribing after the first vid) i have found soo much knowledge
you are a champ
No. A water surface will act like a solid surface and provide the 'air cushion' for an In-Ground-Effect (IGE) hover. The helicopter's rotor system is 'pulling' air from above and forcing it through the system to create its lift. A helicopter actually requires less power to hover IGE. If the helicopter has enough power it can hover Out-Of-Ground effect (OGE) as well Sometimes, an overloaded helicopter may not have power to hover at all on any surface and this may be what you are referring to
The engine and rotor RPM are both constant. The gearboxes reduce speed (~20,000rpm at the engine to ~300rpm at the main rotor), increase torque, and split power between the main and tail rotors. The amount of lift produced is controlled by the collective changing the angle of attack of the blades, while RPM stays the same.
How fast you can fly and change direction without losing control, amazing!
That cleared up a lot of questions I had but never came across the time to go research myself. Can't wait for the rest of the videos!
I was a little confused by this too, but I thought about it and rewatched the video and it makes sense now. I had to make the rotor shape with my hands to realize that if you tilt both in the same direction while maintaining their positions relative to each other, one side will produce more lift and the other will produce less. However, the rotor tilts the opposite way each half rotation to keep lifting on the same side. Seems a little overcomplicated, but mind blowing nonetheless...
I am SO glad I decided to subscribe. This looks like on of the most badass educational series yet! Cool, awesome, informative, and actually teaches me something I didn't already know or understand.
how could anyone possibly "dislike" this vid!?!
Great work, and thanks for the awesome, educational videos!
Paused it at 0:13 at went and bought one! Can't wait to fly it!
Alpine Ace and do some crashing tricks
I don't know about RC helicopters, but most personnel helicopters do change the speed of the back rotor to change direction. if the speed increases it rotates right, if decreases, left.
You're almost right.
So what explains why a helicopter can be on the ground with the rotors still moving at full speed. Because the blades aren't creating any down force to push the helicopter up...Dustin...You're awesome!
This is super convenient for me because I'm currently learning how to fly a real helicopter! I just learned about all this stuff last week and in less than a month's time I'll be flying a real Robinson R44 helicopter!
dude that piloting at the end was unreal!
HOLY SHIT that guy is good at flying rc helos. That flying at 4:10 was INSANE.
man his chopper reminds me of a dragon fly in how it moves and even how it sounds
All this way loving helicopters without understanding their movement mechanics, thank you!
Some have electronic motors on the rear..... So the speed may vary depending on if its a belt drive, or a separate electric motor.
Once you have seen how it works it is pretty simple but oh boy inventing this system from scratch? Work of a genius :O
I always thought that helicopters could go up or down by changing the rotation speed of the blades. Now I can grasp this better.
The reason why he can get off the ground is because RC Helis have a high thrust to weight ratio, so it doesn't take much force to keep the thing aloft. The Red Bull Helicopter does not have negative collective, meaning it cannot sustain inverted flight. It only temporarily goes to 0 collective at the top of the loop (or when it's upside down in a barrel roll) so that the lift generated by the rotor will not "pull" it back to the ground.
You just explained something that i have spend manny an hour pondering and for this i thank you
when someones flying a helicopter like that and doing those 3D maneuvers, does anyone else start thinking about dragonflies?
same
Ok so if you see the rotor as a circle from above, cyclic pitch creates more lift in one area of the circle than another. This causes this area to rise, shifting the force keeping the helicopter flying from straight down to angled, so you can use it to get where you're going. g
I kinda always knew this, I just couldn't imagine that we had tech that kept a rotor-blade that's changing pitch a hundred times a second from shaking to bits. I mean I can see that now we can, easily, but when the first heli's went airborne this wasn't the case.
+Peter Timowreef , whoever designed the swash plate is a genius ;)
RC FunTime
Yea, that's proven beyond a shadow of a doubt. I still can barely believe it actually works like that.. the vibrations.. the loads... unbelievable.
+Peter Timowreef. That's right. It's hard to imagine but if at zero pitch the rotor blades are as close as possible to zero deg it will have minimal vibration. Also obviously the blades are both should be identical in weight and size.
There are Helis that can do limited aerobatics. The Apache and Comanche are examples from the US arsenel. Check it out. - watch?v=1GIiYV9YEnY - Full loop starts at 2:30. There is a severe limit to the amount of G a Chopper can tale due to the change in wing (rotor blade) loading as pitch changes, so the manouveres are much slower than a conventional aircraft (or a model which has smaller parts). There are probably a few russian/Chinese choppers that can do the same type of manouvres as well.
I guess an analogy to add that I didn't see in the video is that each blade is shaped as an airfoil, like an aircraft's wing and that's how the rotors generate lift. The collective changes the angle of attach of each blade just as an aircraft pitches upward during takeoff...Cyclic can best be visualized by drawing an imaginary circle around the rotor when viewing from the top. Blades change their angle of attack slightly as they make their way around the circle... Just an FYI... Force=Reaction..
As a tech geek I'm sure you've heard of the trw-17 rotary subwoofer. They used a swash plate instead of a traditional voice coil. This lets it control a HUGE amount of air.
That's because gravity is a very weak force, so basically he is allowed to suspend for a brief moment. Usually when you want to achieve a brief hover at an angle, you'll "throw" the helicopter into that hovering position.
If we want to briefly hover with the tail towards the upper left of the screen, we'd initiate that by accelerating up and left. When gravity takes over as thrust decreases, the helicopter wants to go right, but he pulls off another move before gravity has a chance. :)
awesome video. I was really hoping he would have shown that kids hands on the controller. I wanted to see him doing those crazy moves on the joysticks.
i love the music on all your videos
Man, that is so interesting. I just realized that the shuttle's engines ARE displaced sorta "above" the soldid rockets and liquid tank thus off of the axis of rotation. So you could get a moment by vectoring the exhaust sideways. That sorta explains why you can see the shuttle main eninges swinging when the engines start. Derp. (Facepalm) lol. Thanks Destin. I just got smarter today!
To change direction, you actually have to give a force in the opposite dirn... Much like a space capsule steering in space... In case of slowing down, you tilt the rotor back... In extreme cases, you see the helicopter pitch up for drastic braking, called a flare.
My guess is that it would help, but it would be very difficult to make it perfect. For example, when you pitch forward, any unbalanced areas would cause the aircraft to spin to some degree. Either way, a tail rotor is still a nice thing to have because it gives you yaw control.
Each helicopter has a fixed small range of rotor rpm when the lift force generated = weight of the helicopter. The heli is now "floating" off the ground. Any further change in angle of attack/pitch of the rotor is what causes the heli to go up/down... what you hear as an apparent change in rpm, is the distortion of sound waves as the blades change their pitch...
I think the main reason most real size helicopters do not perform these types of maneuvers is because they do not have negative collective. What you don't notice is his blades are not like an airfoil you would typically see on a real heli (near flat on bottom and curved on top), it is symmetrical on both sides meaning he can produce negative lift when upside down. If you put these same type blades on a real heli, it probly wouldn't produce enough lift to get off the ground.
I want to see actual helicopters do this!!
It's awesome and entertaining! Love the series!
Destin absolutely loves what he does.
One word... FUN!
Thank you!
Full size helicopters do have some negative collective pitch, but its generally only about 2 degrees at the most. If they did not have any negative collective capability, then they could not perform an autorotation landing from a high altitude, meaning certain death if the engines ever failed.... I'm sure they also use negative just to stay on the ground in gale force winds...
Just wait in this series, they are sure to cover Autorotation landings in a future video.
Thank you so much I learnt allot I'm going to nag for pitch helicopter for Christmas, and say how much it can improve my understanding of helicopter physics by actually trying it. Awesome vid.
Destin I decided to to Mechanical Engineering. I'm super stoked.
4:40 Because flying straight is too mainstream!
Anyway I did not know how the blade worked, I honestly thought that the speed of the blade determined the altitude of the heli. Can't wait for the next video!
destin i love you I've all ways wanted to be a helicopter pilot and you've helped me set that plan n motion thank you so much.
Think I'm gonna get myself one of these...that was awesome.
That guy flying the helecopter has some serious skills!
I mean i knew that heli's were very hard to fly but WOW. Thanks for these amazing vids.
i had to watch this video to understand the 90 degree out of phase concept, because only here i saw that the rods for the pitch control are no aligned or directly under the blades. now all makes sense :D