ELI5: Explain Like I'm 5

Propeller theory

Okay, kiddo, have you ever seen a fan? It spins around and blows air, right? Well, a propeller is like a fan for an airplane! It spins around and moves the airplane through the air.

Now, let's think about how a propeller works. It's made up of blades that are kind of like wings. They're shaped in a way that creates lift when they spin around. Lift is what makes airplanes go up and stay in the air.

But the propeller also needs to push the airplane forward, not just lift it up. That's where something called "thrust" comes in. Thrust is the force that propels the airplane forward.

So, to create both lift and thrust, the propeller needs to spin through the air at the right speed. If it's spinning too fast, it can create too much drag (kind of like trying to walk through water when you're wearing a heavy backpack). If it's not spinning fast enough, it won't create enough lift or thrust.

There are also different types of propellers that are designed for different kinds of airplanes. Some are designed to be really efficient, so the airplane can travel further or use less fuel. Others are designed to give the airplane more power for things like takeoff and climbing.

So there you have it, buddy! Propeller theory is all about how propellers work to lift and propel airplanes through the air.