Air Cannons, Catapults and Trebuchets

Check out how these flying machines do their thing.

AIR CANNONS
Learn the key to a successful air cannon.

TREBUCHETS
This medieval architecture stands the test of time.

HowStuffWorks on Catapults
HowStuffWorks weighs in on catapults and Punkin Chunkin science.

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Image Credits DCL | Reprinted courtesy Adventures from the Technology Underground (2)| iStock