Uber performance helicopter?

[evelrod]

I'm not really 'into' helicopters but since looking at the X3 I kinda segued into the RC realm...I'm not too sure what to make of this thing.

http://www.flixxy.com/coolest-rc-quadrocopter.htm

Rod

 

[MiketheEngineer]

THAT is a very good pilot. You can buy these online or in upper class hobby shops for $200-$300.

Pretty amazing little machines!!

 

[berkshire]

It sounds like a demented bumble bee.
B.E.

The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor

 

[evelrod]

Just curious about what control inputs for yaw? Either this pilot is a genius with super reflexes or he is a computer controlled android.....;o)

Rod

 

[thruthefence]

What amazes me, is that it seems to tumble end-over-end, and then instantly resume stable flight!

 

[GregLocock]

My guess - yaw is controlled by accelerating all the rotors while reducing collective. Or as is more likely if they are fixed pitch then diagonally opposite rotors are reverse pitch, so when you accelerate FL and RR and decelerate FR and RL then the net lift stays the same but the body yaws.

The end over end flips are amazing, although some of the other tricks are prettier.



Cheers

Greg Locock


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[tbuelna]

The end over end flips are amazing, although some of the other tricks are prettier.

GregLocock,

At higher speeds, the X3 wings are producing a fair amount of lift and unloading the rotor. So the X3 becomes much more responsive; more like a fixed wing aircraft.

One benefit the single rotor X3 configuration has over the coaxial X2 is the rotor tip deflections. Take a look at the picture below. Even with the X2's small diameter rigid rotors, at high speed you can see the blade tips can potentially pass very close to each other on the side where the upper blade is retreating and the lower blade is advancing.

 

[GregLocock]

that's the other thread i think

Cheers

Greg Locock


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[epeus]

that is neat, i soo want one

"quadrotors use fixed-pitch blades, whose rotor pitch does not vary as the blades rotate; control of vehicle motion is achieved by varying the relative speed of each rotor."

 

[FeX32]

Cool vid.
There is a company Quanser in Canada that sells that type of model to universities around the world for research related to control theory.
Neat stuff.

http://sites.mecheng.adelaide.edu.a...s.php?wpage_id=44&title=37&browsebyauthor=115

http://www.quanser.com/english/html/UVS_Lab/fs_Qball_X4.htm

Fe (IronX32)

 

[swearingen]

This pedestrian version has two cameras on it and can be controlled by your iPhone/iPod Touch/iPad. You can also get a VR app for it that allows you to shoot missles at another one and have AR battles.

http://ardrone.parrot.com/parrot-ar-drone/usa

-5^2 = -25 ;-)

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