So in this picture you see that rotor four is spinning faster and rotor two is spinning slower.

Where's the propellers?

So it has four rotors.

Cockpit, propeller, engine.

And then finally, if you spin opposite pairs of rotors faster than the other pair, then the robot yaws about the vertical axis.

Curls on Green

I never should've taken the freighter. Should've gone by clipper.

Yes, it must be a flying machine. It's got, um, propellers.

You're not powering the propeller, you're powering the wheels.

If you spin these rotors at the same speed, the robot hovers.

If this plane is imaginary, then so are those engines and so are those props.

So these are helicopters with four rotors and they're roughly a meter or so in scale and weigh several pounds.

If you increase the speed of each of these rotors, then the robot flies up, it accelerates up.

But if my theory is for the birds and those props are real, make sure you notify my wife.

And the other way around, if you increase the speed of rotor three and decrease the speed of rotor one, then the robot pitches forward.

And despite the aerodynamic interactions of these propeller blades, they're able to maintain stable flight.

X ray diagram, he thought was comparable with the helix.

There's a gyroscope in it.

Helix

The Spiral

Spiral

Spiral1

Spiral2

Complex number

Spiral number

Helix

Spiral

Squiral

Monkey wrench? Oh.

In a helicopter you feel and it's still a remarkable sensation you feel like you're being hauled up from above by a vibrating crane.

That's nothing new that's a propeller clock that's the rims that you can buy for your car.

People have been struggling for years to try and design a very fast rotating boat propeller that doesn't cavitate and literally wear away the metal and put holes in it, just like these pictures show.

Currently stationed in the main hangar at the airforce base are two Mi 24V helicopters without the blades for their main rotor and one functioning Mi 24P with blades (registration TU VMO).

And they've already found that by being more intelligent about better propeller design, you can reduce that noise by 90 percent.

Squiral

Toxic spirals

Helix 2

Helix 3

Helix 4

Handedness

Spiral Shape

Change spiral

A spiral shape

Hexacopters and octocopters, with six and eight propellers, can provide redundancy, but quadrocopters are much more popular because they have the minimum number of fixed motor propeller pairs four.

OK, so here, this is the book spiral.