Contra Rotating Propeller Toy Torpedo

thingiverse

The contra rotating propellers minimize the torpedo's spin, making it travel farther and more efficiently. A pin (like part of a toothpick) is required to hold the middle gear in the casing. A small motor can fit inside, along with small batteries. This can also be powered by a rubber band, I have had success by using superglue to put a hook (a paperclip can be used) onto the propeller shaft and the nose. A rubber band can be strung between them. Twist the propellers to wind it up. MOTOR: https://www.amazon.com/gp/product/B07FV8RT3L/ref=ox_sc_act_title_3?smid=A18IHNL4DD28Y&th=1 If you appreciate my designs and would like to support my work, consider leaving a tip. Your generosity helps me continue creating and sharing more exciting models in the future.