異域文化 中世紀攻城戰(zhàn) 12

In terms of the kind of dialogue that existed between attack and defense, it is very clear now to me that the appearance of trebuchet on the scene shifted that balance radically in favor of attack.

It gained tremendous respect for the medieval engineers. They were able to build a frightfully powerful and highly accurate, and easily adjustable machine.

If you are under siege, you’ve got to try to knock these things out before they are actually built. ‘cause once they are built, you are sunk.

The trebuchet is a big machine who can block the wall, and also a trebuchet must be the wolfwall.

Wallwolf.

Wolfwall?

Wallwolf.

Wallwolf. It’s so difficult. We must change this name. Wallwolf. Haha,hehe.

It’s clear from the experiment that both types of trebuchets work. Because it can so easily be increased in weight, the swinging box design was the improvement that tipped the balance in favor of attack. So the great wall-busting siege engine Edward employed in Sterling Castle was almost certainly a trebuchet with a giant swinging counterweight.

A weapon that dominated siege warfare for 200 years. It was not until the late 15th century, the end of the Middle Ages, that the superiority of cannon clearly emerged. And the trebuchet vanished into the mists of time.

Become a medieval engineer on NOVA’s website. Build your own trebuchet and knock down the castle walls.

To order the Secrets of Lost Empires, 5-video set with a free family activity book, please call WGBH Boston Video at 1-800-255-9424. The family activity book is also available separately for shipping and handling only.

An international tale of intrigue and suspense, the race’s on to create a perfect diamond. Can science make a gem as good as the real thing? The Diamond Deception, next time on NOVA.

NOVA is a production of WGBH Boston. Major funding for NOVA is provided by the Park Foundation, dedicated to education and quality television.

This program is funded in part by Northwestern Mutual Life which has been protecting families and businesses for generations. Have you heard from the quiet company?Northwestern Mutual Life.

Cnet.com help you to find the right technology product.

Additional funding for this program is also provided by the David H. Koch Charitable Foundation. And by the Corporation for Public Broadcasting and by contributions to your PBS station from viewers like you. Thank you.

This is PBS.