I forgot to mention that the launcher has to be mechanical. This rules out the air cannon, so I am stuck between the spring cannon and the trebuchet. The distance that we set the launcher at is all up to us, so it can travel 20 meters before the wall, or 2 meters before the wall.
Hey all, I need to build a launcher that is capable of throwing a tennis ball over a 1 meter high wall and hit a target 2 meters away. I realize there are some threads already discussing this, but my question is more based on the type of launcher. Would a trebuchet or a spring powered cannon be...