The Rubber-Band Powered Hovercraft

A toy for the young mind.

Target Age: 7-11

Concept: This simple toy helps children explore the concepts of stored energy and propulsion. By turning the fan blades on the rear of the toy, the child can store energy in the rubber band. As the blades are released, the rubber band will release its stored energy and spin the blades in the opposite direction. The shape of the blades will generate propulsion as they turn. Depending on which way the blades are originally turned, the toy will move either forward or backward. Of course, instead of actually hovering, the toy will roll on small wheels.

The toy as currently envisioned by the creator.

Technical considerations: As shown in the drawing, a single piece fan blade drives the toy. In order to allow the toy to go fast, it should be constructed of a light material such as balsa wood or plastic. Additionally, the wheels must be well-aligned and have little friction to make sure it goes fast.

Safety concerns: Clearly, fan blades spinning fast pose a safety hazard. Using the single piece ring blade set up should reduce, but not eliminate the chance of small fingers getting caught in the blades. Additionally, the rubber may snap and go flying. Future prototypes may enclose the top of the hovercraft to minimize this risk. Finally, the wheels, if by some chance they detach, may present a choking hazard.

Probable Cost: This toy is both fun and education, but can be made from low priced materials. If packaged well and nicely designed, it could be a popular toy. Ideally, even a young child should be able to purchase this toy with allowance from a week or so. Final Estimate: $5 - $7.

 

Credits:

Toy Design and Webpage Design: Lars Hanson

Link to Class Website: Rapid Prototype Design

Go to: Concept2: Paddle Game