This Is my current project, a super powered catapult. Frame is 2inch angle iron and is currently powered by a snowplow spring. To draw it back I am using a 2000 lb winch connected to a 13 turn block and tackle. I want to build a tracked robot that I can bolt this monstrosity to so that I can move it via remote control. I also plan on making it so I could ata h a snowplow to it and maybe a lawnmower.
This is a companion discussion topic for the original entry at https://community.robotshop.com/robots/show/catapult-robot