Boat-Tub-RubberBand
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Rubber band-driven boat provides the next generation fun in the tub and a bit of mechanical / fluids education.
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Model information
- Source
- Printables
- Category
- Engineering
- License
- Creative Commons — Public Domain
The kids might greatly enjoy having this self-propelled boat in the bath. They will learn how the angled blades push the boat (or pull it backward if the rubber band is twisted the wrong way.)
It employs a twisted 12-16" rubber band to provide the energy to turn the propeller. I found the rubber band on Amazon.
I reduced the propeller's diameter a little so that it did not break the surface when spinning. When it broke the surface, a net side force made the boat yaw.
The nose fitting can be angled 0-5 degrees (port or starboard (right)) to make the boat turn.
If you want to use a smaller rubber band, you could scale the hull along the keel axis and it should work out OK.
We have only showers in our retirement home. No tubs - Just two community pools.