On 10/23/05, Josh Coffman <josh_coffman@xxxxxxxxx> wrote: > ayone know how to make a launcher for a jar? There are several effective methods. Probably the simplest method is to find a long board that is wide enough to fit the jar on, and to fix it on an axis. The height of the axis should be about one fourth the length of the board. A 'launch surface' made of friction material is recomended if you want the jar to lauch upwards. Otherwise, centrifical force causes the jar to slip outward and leave the board prematurly. I also recomend the use of plastic peanut butter jars. Their lightweight construction lets them reach amazing heights, and they don't break. Dotan http://technology-sleuth.com/technical_answer/what_is_a_firewall.html
