Catapult inspired by Leonardo da Vinci, more powerful than a simple desk toy, roughly 110mm tall (frame) Easily printed within 24 hours, have fun!
Be sure to upload photos of yours when its complete! Id love to be able to include them in my end of semester presentation! Thanks!
UPDATE - 31st March 2019
1 - Enlarged top holes on A frames to allow for smother rotational motion.
2 - Removed material on "Right A Frame" This removes the need for supports and saves time/ material.
3 - Added the option to print the base all in one which saves 4 fasteners and the need to worry about disobedient support in long holes. (DO NOT PRINT 'FRONT FRAME' AND 'BACK FRAME' IF USING THIS OPTION)
UPDATE - 1st April 2019
1 - Removed the need for a screw to stop the trigger, saves one screw and print time.
2 - Modified the whole model to use standard size screws (see below in "materials needed").
3 - Work began on a miniature version.
UPDATE - 5th April 2019
1 - Modified fulcrum to add strength and make easier to print without supports at the bottom.
2 - Modified left A-Frame to add strength to angle stop function.
UPDATE - 6th April 2019
1 - Added an assembly video to ease the construction process. https://www.youtube.com/watch?v=ZB9BcsdIJiA&feature=youtu.be
Overview and Background
A prototype for a university project.
Lesson Plan and Activity
To Build A Catapult
Design a catapult that can fire a certain distance. The catapult has to be adjustable and fire from 1 meter up to 5 meters. Most accurate design wins.
- M4 x 25mm Cap Screws - 11
- M6 x 25mm Cap Screws - 6
- M6 x 40mm Cap Screw - 1
- M6 Threaded rod 80-100mm long
- M4 Nut - 3
- M6 Hex Nut - 3
- M6 Nyloc Nut - 2
- Washers are optional
- An assortment of elastic bands (smaller ones will give greater power for the arm)