Studio IV/Introduction to Engineering Design: Self, James Manchester
PAL (Powered Air Launcher)
This was mini-project in which we had to create a launcher that shot a large marshmallow at least 20 ft. Most people in the class went with a traditional catapult design. We decided to be different and create a quasi-neumatic system using a plunger and bungee cords.
Needless to say, ours ended up being able to shoot 60 ft (with enough bungee cords), and was by far the most powerful launcher of the entire class, possibly in its long history. It was a fun little project, with a lot of interesting building experiences.
There's the final technical memo and presentation included.