Submarine
thingiverse
Not to scale, and not print tested, but designed by a former submariner for what that is worth. Here is the link to the object on Tinkercad if you want to modify it or see how it was made:https://tinkercad.com/things/dinSdSlWVid I've designed a more printable version here: https://www.thingiverse.com/thing:2850764
Download Model from thingiverse
With this file you will be able to print Submarine with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Submarine.