This catapult is based on early tension power catapults. First built by the Greeks over 2000 years ago, these early catapults worked like a very large bow and arrow. Their power came from bending back a large leaf spring, often fashioned from wood. The version in this plan uses very large rubber bands for its power source. This project can launch a volleyball or soccer ball up to 60 feet! It is made mostly from standard size lumber and measures approximately 40"H x 58"L x 31"W. The patterns for all parts are drawn FULL SIZE. Order 6 each #2286 Rubber Catapult Bands separately.