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

You can do gears and nuts and bolts that you can buy at Whole Foods.

This is DNA in its classic double helix form.

All stop valves with screwed spindles shall close by a clockwise motion of the handwheel.

All stop valves with a screwed spindle shall be closed by a clockwise motion of the handwheel.

If we unwind the double helix and unzip the two strands, you see these things that look like teeth.

There's a gyroscope in it.

Helix

The Spiral

Spiral

Spiral1

Spiral2

Complex number

Spiral number

Helix

Spiral

Squiral

Monkey wrench? Oh.

Squiral

Toxic spirals

Helix 2

Helix 3

Helix 4

Handedness

Spiral Shape

Change spiral

A spiral shape

Gears

Gear size

Gearhead

A gearhead

In the middle we have a motor, and we also have a gear in it, and we use the gear to transfer the circulation of the motor.

Curls on Green

Where's the propellers?

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

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.

So it has four rotors.

OK, so here, this is the book spiral.

It's a double helix.

Spiral In

A tiny cog in the great wheel of evolution.

Cube Gears

Cockpit, propeller, engine.

Italy s Downward Spiral

A snail's shell is spiral in form.