Design Concept
The design of the rubber band powered torpedo toy is inspired by simple and interesting physical principles, simulating actual underwater movement through a rubber band-driven torpedo.

Usage
This toy is suitable for use in swimming pools or bathtubs, bringing great fun and educational value to both children and adults, demonstrating the charm of basic physics.

Printing Recommendations
It is recommended to print with PLA material with a layer height of 0.2mm to achieve better detail representation. Use support structures to ensure stability.

Assembly Instructions
After printing, the torpedo body and propeller need to be assembled. A rubber band is required: the rubber band at the bottom is threaded through a hole and tied in a knot, and at the other end, a pin can be used to secure the rubber band to the front of the model.