A Conversation for The Ballista and Trebuchet - Antique Catapults
Update
U168592 Started conversation Mar 28, 2007
A couple of Researchers have got together to update this Entry.
The Work in Progress is here; A20180369
Once we're happy, we will post it to the UpdateForum
Anyone can contribute! 
(Particularly the original author Lord Preston, if they're about).
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