Results at 100 responses:
Code:
Single-sided wheeled launcher 25 25.00%
Double-sided wheeled launcher 35 35.00%
Linear accelerator (pneumatic powered) 2 2.00%
Linear accelerator (elastic spring/surgical tubing) 4 4.00%
Rotating arm (catapult, trebuchet, etc.) 18 18.00%
Another method (please share in comments!) 4 4.00%
Launching? No thanks. 12 12.00%
Looks like we're going to see a lot of wheeled launchers at the competitions this year.