Re: Catapults At Championship
 

My team (714) is using a slingshot system. I'm not sure if you want to include that in your list.

We use a cannon like chamber through which we accelerate the ball with a plate attached to calibrated surgical tubing. Upon moment of release we add a backspin for consistancy in trajectory.

Good Luck to everyone at St. Louis! We'll be in the Newton Division, see you all there!

Re: Catapults At Championship
 

We didn't make it to championship but you might like to take a look at what we designed. http://a4.sphotos.ak.fbcdn.net/hphotos-ak-prn1/544890_278981742182900_100002132300180_639202_1230 627222_n.jpg

Re: Catapults At Championship
 

3081's thrower is a pneumatic catapult with spring assisted return.