Print and assemble your own functional torpedoes!
 
This package includes the front and rear torpedo bodies in 1/32 scale, along with a 3-bladed propeller. Buyer is responsible for sourcing all components needed for construction of the functional weapon, including 3V LiPo battery, micro motor, reed switch and timer. The timer module is available for purchase separately here. 

Download includes the three STL files and an instruction sheet. 
 
Want to see what a functional torpedo would look like? Check out my video here.