Download or read book The Art of the Catapult written by William Gurstelle and published by Chicago Review Press. This book was released on 2004 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: With some scrap wood, rope, hammer, nails, and this book, build seven historic catapults including Ludgar the War Wolf, God's Stone Thrower, Cabulus, and the Wild Donkey -- simple yet sophisticated hurling machines that rely on the fundamentals of math and physics using levers, force, torsion, tension, and traction.