This is a lego ship design for electric motors (with optional gear box, depicted). Recommend using plastic epoxy to glue together. I used this propeller in the design (https://www.thingiverse.com/thing:4928097). The steering gear mount is for the Power Functions Motor Set - Servo motor 88004.
Gear_Mount.STL | 262.9KB | |
Rudder.STL | 18.2KB | |
SG_Mount.STL | 188.8KB | |
Ship_Back.STL | 3.3MB | |
Ship_Front.STL | 1.4MB |