catapult
thingiverse
To construct a catapult, one must still obtain a length of cord measuring one meter precisely. I have created a tutorial on how to properly thread this cord into place, which may prove slightly challenging but will ultimately yield positive results. By carefully adjusting the tension on this cord, you can effectively modulate the power output of your catapult.
Download Model from thingiverse
With this file you will be able to print catapult 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 catapult.