RuBoat - Rubber Band-Powered Bath Toy

Description: 

RuBoat is not just an ordinary bath toy—it's a thrilling adventure waiting to unfold in your bathtub! Inspired by the design of racing boats, it harnesses the power of a twisted rubber band to propel itself across the water. But RuBoat isn't just about fun; it's also a valuable educational tool that introduces children to fundamental physics principles interactively and engagingly. 

Physics background: 

Twist the rubber band to store energy, then release it to unleash RuBoat's full speed. Two water wheels on either side of RuBoat transform the stored energy into a rolling motion, propelling the boat forward with each twist. RuBoat doubles as a tool for teaching children about the principles of energy transfer, propulsion, and motion, making it an ideal addition to classroom demonstrations or home science experiments.

Assembly (for V1.01)

Begin by inserting the axle through the designated cutout in the RuBoat body, ensuring it is positioned correctly. Attach a water wheel to each side of the axle, securing them in place with a small drop of super glue. Next, thread an appropriately sized rubber band through the hole at the front of the boat and tie a knot to secure it. Stretch the rubber band from the hook to the axle, allowing it to store power for propulsion. To charge the rubber band, roll the water wheels backward. Once ready, while holding the wheels place RuBoat in water and release to watch it glide effortlessly across the surface, powered by stored energy from the rubber band.

Maintenance 

After playtime, rinse RuBoat with clean water and allow it to air dry before storing it for future adventures. If printed in PLA, do not use hot water. 

Warning: 

Remember, 3D prints are not food-safe. This product contains small parts that may pose a choking hazard, particularly for children under the age of 3. Keep out of reach of young children to prevent accidental ingestion or aspiration. Adult supervision is recommended during playtime to ensure the safety of children and to prevent any potential choking incidents. Inspect the product regularly for any signs of damage or wear, and print spares immediately if any small parts become loose or detached. 

Changelog:

V2.00_RC (03/02/2024):

• Rework wheels and axle. They are stronger and easier to assemble. Easier to print.
• The rubber band can be now fastened in the axle with an M3 screw or plastic from a 3D pen. Less preparation of the band = more fun!
• Added cover so splashes don't enter the RuBoat. 
• Not tested yet! New info soon.

V1.01 (19/02/2024)

• Better clearances for the wheels.

V1.00 (19/02/2024)

• Proof of Concept - Tested. Works. Probably will do some small adjustments.