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Helicopter Piloting is a Dance of Mutually Modifying Control Systems - Smarter Every Day
Helicopter Piloting is a Dance of Mutually Modifying Control Systems β Smarter EveryΒ Day
Everything is much harder that it appears to be.
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In a video, MagzTV accidentally described how a helicopter flies in an amazingly intuitive way that I've never seen before. Watching how the War Thunder helicopter flies I noticed that my helicopter was wrong in EXACTLY the same ways. After seeing the explanation of why it was wrong and how to make it right, I was very curious to see what might happen with some simple changes to an old helicopter of mine.
There were two main changes I made. The first was that that all forces were now applied at the positions they would be in real life. This means that the rotor applies lift above the center of mass, pitching and rolling is induced simply by tilting the rotor blades, while yaw is induced through a tail rotor. The second was that I brought in the SimpleWings from a previous project and added wings in reasonable places to represent body lift and the small wings on the tail.
The results are pretty amazing. It's a night and day difference and the helicopter now flies similarly to how is described that a realistic one should. With just these two changes, a great many properties of helicopter flight just emerged naturally as a consequence of the forces involved.
The main example he used was how rolling onto the side did weird and artificial things in the fake physics, but with realistic-ish physics, once you pass a critical threshold you just kind of lose control because of the way the forces are being applied. You can watch my inputs and it's just doing it all on its own once I passed like a 45 degree bank angle. It was super neat.
Another example is how the helicopter is kind of self-stabilizing to an extent. With the center of mass below the rotors, it generates torques on its own to put the helicopter into an almost hover. It won't hover precisely or anything, nor would it in real life, but there is still a sense of the helicopter always trying to correct itself just due to how its forces are applied.
Really neat stuff. I also might be talking completely out of my ass because I don't really fly helicopters in sims much, so I don't have much of an intuition of what should happen like I do planes. Still it definitely seems more right.
Physics Friday
Helicopter Physics - Episode #7 Smarter Every Day
What happens when you add LEDs to the rotors of a helicopter and fly it at night? What happens if you take long shutter exposure pictures of that helicopter? Some stinking cool stuff! Check out these light paintings of a helicopter in flight - at night!
Physics Friday
Helicopter Physics - Episode 6 Smarter Every Day
What happens when you attach a laser to a helicopter? Really cool stuff. This video helps tie together a lot of the concepts discussed in the previous videos from this helicopter physics series. To watch the rest of Destin's videos in this series scroll down.
Physics Friday
Helicopter Physics - Episode 5 Smarter Every Day
How come helicopters don't have parachutes? It's because they don't need one. Why? Check this out. To watch the other episodes in this series scroll down to see the rest of Destin's series on helicopters.
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Physics Friday
Gyroscopic Precession Veritasium
My previous video today featured episode four of Destin's Helicopter Physics Series. In that episode Destin discussed gyroscopic precession and how it effects the flight characteristics of helicopters. This video by Derek from Veritasium elaborates on gyroscopic precession and helped me understand it better.
As you apply changes to the rotor blades of a helicopter the effect happens 90 degrees after where you would expect it to, because of something called gyroscopic precession. Scroll down to watch Destin's video from Smarter Every Day and watch Derek's video above and learn something really cool. Enjoy!
Physics Friday
Helicopter Physics - Episode #4 Smarter Every Day
Helicopters are big gyroscopes. Gyroscopes are weird! Seriously, this video will blow your mind. Everything happens 90 degrees out of phase. It's freaky! Watch this and make sure to catch the first three episodes below. Enjoy.
Physics Friday
Helicopter Physics #3 Smarter Every Day
Physics Friday continues as we highlight Destin from Smarter Every Day's series on helicopter physics. This episode deals with how helicopters can fly upside down and features some really cool high-speed shots! Check it out. If you missed the first two episodes, scroll down and watch them too. Enjoy!
