Great video graphics. But you missed to explain how the 'flapping to equality' in forward flight causes flapback. And you also missed to explain how the (undesired) flapback is controlled in forward flight, which is by a forward cyclic control input.
@cir9968
Жыл бұрын
If you fly forward, then retreating blade is flapping down, so increasing angle of attack, and compensating lift dissymetry, so it means that the blade would have the highest positio over the nose ? But if you push cyclic forward, then blade pitch need to be channged on the retreating side, and that means it will start producing more lift and flups up, so the highest position will be over tail ?
@jayakin6296
Жыл бұрын
CHOPPERS DON'T FLY, THEY BEAT THE AIR INTO SUBMISSION...
@08mariobro27
7 ай бұрын
THEY SAY NO TO GRAVITY
@Shinji_104
Жыл бұрын
Nice explanation! Now i finaly understand the lift Dissymmetry and the rotor flapping.
@robhaylock7742
Жыл бұрын
Wow. Just a few errors here. First, the flapping from the inequality will tilt the disc BACK, not cause a roll. You even showed that the advancing blade flaps up and the retreating blade flaps down. This is the result of NOT moving the cyclic. The disc tilts back, the aircraft stops moving forward, and then goes backward. The reverse then happens and the disc flaps forward, but the inertia of the fuselage swinging below the disc causes it to flap even lower. Aircraft accelerates forwards faster, flaps higher, and the sequence will go for 3 or 4 oscillations before the aircraft crashes. However! If the pilot introduces forward cyclic to stop the flapback, he is using cyclic feathering to stop the flapback, lift is the same on both sides, and the aircraft keeps going forwards. The tendency to roll to the advancing side is from Inflow Roll, a different aerodynamic effect. Nice animations, but wrong explanations.
@G4AGamingForAll
2 жыл бұрын
Loved the animation. Top work. I will have all that into account. You understand a lot about physics. Huge Likeeeeeeeeeeeeeee 👍😉
@tedpergolizzi6455
7 ай бұрын
Horrible. It’s not explained properly. Plus, the robot voice and music are disgusting .
@javierb5672
Жыл бұрын
Don't undersand how the helicopter will roll sidewards. Due to gyroscopic precession, shouldn't it roll backwards?
@darthvader8804
2 ай бұрын
The stall starts at retreating blade side the effect of G Precession is felt 90° from stall in direction of wing travel being aft torque from the RBS causes roll to that side G Precession cause torque down aft causing the front to pitch up during the RBS roll.
@ankitagarwal3399
Жыл бұрын
Awesome work And thanking you for such a great understanding video
@Jeff-cp9xn
7 ай бұрын
I hate robot voice overs…. Everyones trying to do KZitem automation
@danielwackerman7749
2 жыл бұрын
I’m a new CFI and would like to use a video like this for teaching. Would it be possible to get a video made with only one of the helicopters that you presented here? Specifically looking for a Copter with three blades, rotating right-side back. Fenestron tail rotor. (Guimbal Cabri G2)
@workingsgotanimated
2 жыл бұрын
contact me with details.
@PrivateArmy666
Жыл бұрын
Yeah i watched it twice and, great video 😬
@squpsqup2708
Жыл бұрын
the best vidoe ever for understanding Lift Dissymmetry
@mariebcfhs9491
Жыл бұрын
But if the retreating blade flaps down too much, the angle of attack can surpass the stall angle and caused retreating blade stall. So the helicopter must fly slow enough that the forward motion does not cancel out the lift from the retreating half of the rotor disc.
@robhaylock7742
Жыл бұрын
If you are flying forward, then the retreating blade is flapping UP, so that the overall disc is tilted forwards. The cyclic has been moved forwards to stop the flapback. There is no "flapping to equality" in forward flight. Yes, if you go fast enough, or are heavy enough, or are high enough, the stall angle will be reached, but remember that the inner part of the retreating blade is stalled anyway.
@ericdixon2898
7 ай бұрын
Google Bo-105 rotor head. It's rigid. No flapping.
@TommyBahama84
Жыл бұрын
Disymmetry of lift creates inflow roll which is overcome by flapping to equality
@robhaylock7742
Жыл бұрын
Umm...no. Inflow roll is caused by the inflow (at speed) at the rear being higher than at the front. Flapping to equality only happens at low speeds, with the cyclic held fixed, and soon fixes itself by crashing the aircraft.
@kevingw5379
Жыл бұрын
I'm curious to know if this problem of lift dissymmetry is automatically cancelled out in helicopters with counter rotating rotor blades.
@fast28xxxlife
5 ай бұрын
Yes
@charlieteirney4252
2 ай бұрын
Fucking great video mate
@ronaldgreen5292
5 ай бұрын
Or you can say; "advancing and retreating blades!" The advancing blades will have more downward flow, than the retreating blades. This is the "rotor disk," area. This is caused by the tilting angle of the swashplate. In any direction of the cyclic lever, or handle for directional control.
@GIOACE
6 ай бұрын
It will pitch not roll... because gyroscopic precession affect.
@fast28xxxlife
5 ай бұрын
No, not to aerodynamics
@Geosbudy
Жыл бұрын
Machines that shouldn't fly... Has to fix every law of motion and aerodynamics
@feelingzhakkaas
6 ай бұрын
What if wind is not horizontal but inclined?
@Lost_boy_mkd
7 ай бұрын
What if the wings are not shaking
@archangel9114
Жыл бұрын
It was the spanish Juan De La Cierva who came up with the solution to the problem when he invented the autogiro by putting hinges in the rotorhead.
@danandrewkarpat3228
Жыл бұрын
You did not explain how it is done.
@DigitalArtisan77
5 ай бұрын
Yes he did. But if you want the mechanism that allows it it’s the swashplate.
@sebastianclaverizamora2305
Жыл бұрын
Thanks, it was perfect
@ariyarathneachala6234
Жыл бұрын
Thank you a lot
@figfire
Жыл бұрын
Way over my head
@ariyarathneachala6234
Жыл бұрын
Thank you
@jonathanarias2729
Жыл бұрын
Cool
@aleksandarzhelyazkov8399
Жыл бұрын
Awsome!
@421sap
Жыл бұрын
G-d bless
@danielwackerman7749
2 жыл бұрын
Great work!
@sanubionskiwalker957
2 жыл бұрын
Good job..problem is only 13 of us get it. Oh well. Heli most amazing piece of machinery
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