Helicopter Lift Dissymmetry 

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.

Nice explanation! Now i finaly understand the lift Dissymmetry and the rotor flapping.

Loved the animation. Top work. I will have all that into account. You understand a lot about physics. Huge Likeeeeeeeeeeeeeee 👍😉

the best vidoe ever for understanding Lift Dissymmetry

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.

Awesome work And thanking you for such a great understanding video

Yeah i watched it twice and, great video 😬

Thanks, it was perfect

Thank you a lot

Thank you

CHOPPERS DON'T FLY, THEY BEAT THE AIR INTO SUBMISSION...

Awsome!

Great work!

Cool

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)

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.

What if wind is not horizontal but inclined?

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.

I'm curious to know if this problem of lift dissymmetry is automatically cancelled out in helicopters with counter rotating rotor blades.

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.

What if the wings are not shaking

Disymmetry of lift creates inflow roll which is overcome by flapping to equality

Don't undersand how the helicopter will roll sidewards. Due to gyroscopic precession, shouldn't it roll backwards?

Fucking great video mate

G-d bless

It will pitch not roll... because gyroscopic precession affect.

Google Bo-105 rotor head. It's rigid. No flapping.

Machines that shouldn't fly... Has to fix every law of motion and aerodynamics

You did not explain how it is done.

Way over my head

I hate robot voice overs…. Everyones trying to do RU-vid automation

Horrible. It’s not explained properly. Plus, the robot voice and music are disgusting .