Sweet Helicopter Moves

[beam]

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[MoeMag]

OMG. That is the most incredible thing I have ever seen. flat out

I had no idea that anything so far had that kind of flight capability. Incredible. Im going to show the aerodynamics instructors at school tomorrow.

That thing needs to have a weapons system on it in the middle east. could you imagine a fleet of those things.

[wetwrks]

I have questions about that vid. I have always heard that a helicoptor cannot fly upside down. If that is correct then that puts some doubt about the validity of this vid.

[wetwrks]

Here is my favorite:

http://www.youtube.com/watch?v=-I5OpvXbhbE

[Ninjeff]

[devildog]

helicopters can fly upside down just fine. you can buy a 150 dollar rc heli that can do it (eflite blade cp pro).

this is called 3D flying, and the guy in the vid is one of the masters.

its even more amazing in person ::leaves to fix his broken rc heli::

[neppo1345]

Video won't load for me at work...is it Szabo?

[Hilltop Customs]

wow, that thing is just insane. I used to fly rc helis and was decent....but theres no way I could keep up with judging the orientation.

what hes doing is at least 50x harder than what most people think. Simple acrobatics with helis is extremely difficult...the reaction time involved for something like this is something most people just dont have.

Helis can fly upside down, it just requires a change in pitch of the blades. Just like if you have your hand out the car window, angle it up it pushs up, angle it down it pushes down....same thing with the blades of the heli.

neppo1345 I think it is Szabo

[skife]

wow, that thing is just insane. I used to fly rc helis and was decent....but theres no way I could keep up with judging the orientation.

what hes doing is at least 50x harder than what most people think. Simple acrobatics with helis is extremely difficult...the reaction time involved for something like this is something most people just dont have.

Helis can fly upside down, it just requires a change in pitch of the blades. Just like if you have your hand out the car window, angle it up it pushs up, angle it down it pushes down....same thing with the blades of the heli.

neppo1345 I think it is Szabo

definatally extremely hard, he's probably gone through 100's of hours of sim time and broke thousands of dollars in roatars and tail shafts.

[zondo]

Theoretically helos could fly upside down I guess, the blades are neutral in camber so it should generate lift in either orientation. But you would have to take into account strain on the body, torque and counter-torque considerations, being able to get fuel to your engines and transmission, and oil through the engines among other things. You could take a look at some of the things the Lynx can do and there is a video out there of an MH-53 doing a barrel role. Shoot, even the scrapped Comanche was capable of a lot. But I'm not a test pilot ...

[acropilot19]

Theoretically helos could fly upside down I guess, the blades are neutral in camber so it should generate lift in either orientation. But you would have to take into account strain on the body, torque and counter-torque considerations, being able to get fuel to your engines and transmission, and oil through the engines among other things.

The problem lies in engineering a Rotor/mast/drive system that is stout enough to support the aircraft inverted. Helos today, even the super-customized RedBull Eurocopter, MUST maintain a positive G load 99.9% of the time because the craft is designed to "Hang" from the blades. Negative G's kill real helicopters (just Google "Mast Bumping"). A small scale model like the one in the vid is "over-engineered" to do what its doing, without having to carry the weight of its full-sized counterpart. "Scale" makes all the difference.