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Book 23, Question 138 · Video

How Can a Twisted Rubber Band Power a Tiny Airplane?

Video · 1:59 · Crafty Clover explains, from A Million Whys Book 23

A tiny plane has no battery. Just a twisted rubber band. So how does that power flight? Rubber-band planes were popular long before batteries were small enough for toys.

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. How can a twisted rubber band power a tiny airplane?

The Big Idea

A tiny plane has no battery. Just a twisted rubber band. So how does that power flight?

Store Energy

Step one: store energy. When you wind up a propeller with a rubber band, you store energy, like in a stretched spring. The twist holds that energy ready.

Unwind and Pull

Step two: unwind and pull. As the rubber band unwinds, it turns the propeller, which pulls the plane through the air. That is the whole engine.

Light and Safe

Step three: keep it light and safe. Little rubber-powered airplanes can fly for a minute or more if they are light enough. Wind them gently and keep your face away from the propeller.

A Closer Look

Let's take a closer look! You wind the rubber band tight. It stores energy like a spring. As it unwinds, the prop spins. The light plane moves forward.

Quick Facts

Quick facts! Rubber-band planes were popular long before batteries were small enough for toys. Little rubber-powered airplanes can fly for a minute or more if they are light enough. The propeller pulls the plane through the air. Wind them gently and keep your face away from the propeller.

Think Like a Scientist

Now, think like a scientist! Wind up a toy with a rubber band and watch it unwind. Count how many turns it makes before it stops. Keep your face and fingers away from the propeller. Ask a grown-up to help you wind gently. Write the number of turns, and share what you learned.

Outro

A twisted rubber band stores energy like a spring and turns a propeller that pulls a light toy plane through the air. Science is amazing! Stay curious! Every question is a new adventure, so keep wondering and keep exploring with me! Ask a grown-up to help you wind safely. Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

Why I wrote this