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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. Through these exciting projects, the colorful history of siege warfare comes to life -- the stories of Alexander the Great and the battle of Tyre; Saladin, Richard the Lionheart, and the Third Crusade; pirate-turned-soldier John Crabbe and his ship-mounted catapults; and Edward I of England and his battle against the Scots at Stirling Castle. For the legions of Tolkien fans, budding backyard warriors, and engineering wizards, this book is a must-have.… (plus d'informations)
He also wrote "Building Bots: Designing and Building Warrior Robots", but I haven't read that one. "Catapult" is definitely in the spirit of "build it yourself", that I like to encourage here and also in "The Cost-Effective Teacher" feature in the print Journal. Gurstelle is an engineer, and he brings an engineer's perspective to the book. As in "Backyard Ballistics, he provides the colorful of the machines that he describes, but he also tells the reader how to tie the necessary knots and how to work with PVC pipe, which is used for some of them. Both of these skills can be useful in other contexts, of course. Projects like these have become very popular in physics classes, partly as a consequence of the excellent Nova program on ancient artillery. These would be excellent father-son-or-daughter activities but youngsters and (especially) exuberant teenagers need adult supervision when these things fire tennis balls or water balloons. They can cause damage or injury. [Isn't that part of the fun?] Chapter 1 is on safety, but cautions are also sprinkled as necessary through the descriptions of the construction and operation of ten different machine models. Part of Chapter 7 shows how to make your own rope, in a manner similar to that used by our clever ancestors. ( )
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The rocks of the hills, taken and shaped by hard work, Are made to soar forward from the sling of a machine; Through wind and clouds they ride upon their way, Like meteors, they thunder through space ~Unknown Chinese poet, 1300
Dédicace
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This book is dedicated to the authors of the books I enjoyed so much when I was younger, and still do today. In particular, H. H. Windsor ("The Boy Mechanic"), William Allan Brooks ("Fun for Boys"), and Dan Beard (The American Boy's Handy Book). Except for Don Herbert, these men wrote their books in the 1940s and before. Happily, times have changed, and if these great authors were still at work, girls would certainly be included in the audience for such terrific activities as well as in their book titles.
Premiers mots
Informations provenant du Partage des connaissances anglais.Modifiez pour passer à votre langue.
[Introduction] In the days before gunpowder was invented, ancient military commanders used large, powerful throwing machines to help them lay siege to castles and forts.
The catapults and related projects described in this book have been designed with your safety foremost in mind.
Citations
Derniers mots
Informations provenant du Partage des connaissances anglais.Modifiez pour passer à votre langue.
The person with the most points at the end of the game wins.
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. Through these exciting projects, the colorful history of siege warfare comes to life -- the stories of Alexander the Great and the battle of Tyre; Saladin, Richard the Lionheart, and the Third Crusade; pirate-turned-soldier John Crabbe and his ship-mounted catapults; and Edward I of England and his battle against the Scots at Stirling Castle. For the legions of Tolkien fans, budding backyard warriors, and engineering wizards, this book is a must-have.
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