Rubber Band Helicopters - Engineering Projects for Kids

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Introduction: Rubber Band Helicopters - Engineering Projects for Kids

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The rubber band-powered helicopter is a favorite of my students because of the ease of construction and the exciting end product!

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Please message me to report broken links. All of these materials are used in my other Instructables for kids, so your purchases can be used across multiple projects.
Materials and Tools:


How It Works:
1. Energy is stored in the sport rubber by winding the propeller.
2. When flown, the sport rubber rapidly releases its energy by unwinding, which turns both the propeller blade and the paper cutout.
3. The paper cutout pushes against the surrounding air, which creates horizontal air resistance, or drag. This makes it harder for the cutout to spin. Because the cutout does not spin as easily, more energy from the sport rubber is released into the propeller, which is much easier to turn. In this way, the paper acts like the rear rotor of a real helicopter
4. As the propeller spins rapidly, it begins to create lift by pushing air downward. With enough energy, the helicopter will fly in whatever direction it is pointing.

Tips and Troubleshooting:

- The number one reason helicopters fail to fly is due to simply not winding the rubberband enough.
- The second biggest reason is caused by letting go of the whole helicopter at once. When I show students how to fly the helicopter, I say, "Let go - let go," as I release the top and bottom. Tell your students that verbalizing "Let go - let go" in one's head or out loud can help coordinate one's hands.
- You may want to tie the sport rubber for younger students during your prep time.
- Try making templates of bird wings or a helicopter silhouette. For one Halloween, I made cardboard templates of bats. For added flair, the project was renamed "Baticopters."
- In my experience, a long rectangle approximately 6" x 1.5" made out of cardstock is the most efficient shape and material.
- Cutouts which span less than 3" typically do not perform well.
- With a little practice, students can throw the helicopter as it is being released for additional height
- Spinning propellers can get caught in long hair.
- Stay far away from buildings, trees and fences!

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    17 Comments

    Too Cool! In a neighborhood clinic near me they have a counseling meeting for parents.I needed an A&D counseling credit for school, and found myself in this group meeting one day. As this meeting The kids they bring generally have nothing to do for the hour, as the focus of the group is on the adult's parenting skills. When I realized what meeting I was in,I figured on Boring,Boring,and more Boring. I couldn't have been farther from the truth. To try and settle down a fidgety and uncomfortable little girl of 3 or 4, (they were all about that age), I made her a 'shuttle' type paper airplane- (the kind that kinda floats slowly, instead of zooming straight into the ground). She loved it! the other kids immediately took notice,and quit squirming and whining - now I was the one having fun.
    I would like to use the helicopter design,and find a way to deploy a parachute when the band's tension is gone. Just a tiny 'chute, more for the looks than anything. 2 projects in one! I'll post whatever I come up with. Race Ya to It!

    i'm in Vietnam and i CAN'T order the Nose Hook Propeller so PLEASE HELP ME MAKE THE Nose Hook Propeller

    I love this project, but where could you buy cheap propellers? Could you make a propeller out of paper or something? Thanks!

    The propellers from Kelvin.com are pretty cheap, only about $0.50 each

    Cool activity!

    One question though, what site were the blades purchased from?

    but wont it spin like a helicopter with out the rear rotor???

    Yes, both the propeller and propeller shaft + foam cutout spin in opposing directions. The whole point of having a foam cutout is to create lateral drag, which reduces the spinning of the propeller shaft so more energy from the wound rubberband goes toward the propeller. It also makes the copter look cool :)

    so its a airplan that fli's up. nice

    Awesome and simple project, tomorrow I make one!