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Origins• China
-5th to 3rd century BC
-Traction Trebuchet
• Arab influence-Counterweight-Influence in expansion
Pictures: L to R Cairo, Experimental, Experimental
In Europe
Reached in approximately 500AD
Origin of the name Engineer
Origin of the word Trebuchet
Scale WellPicture: T to B Grey, Castellan
An Adaptation of the Past
Catapult Comparison
Traction-Hybrid-Counterweight
The Mechanical Improvements
Sling LengthPicture: Grey
History of Reconstruction
• Napoleon III• No surviving Trebuchets• Modern knowledge based on texts and
reconstructions• Arab resources
Pictures: L to R Arabesque, Experimental
How Did it Work?
Objects Thrown Long turn over time Balances:
-Counterweight-Projectile Weight-Throwing arm length-Angle of release
Picture: David
Stages of Motion
• Loading• Setting
Counterweight• Release Trigger• Release of Object• Rocking Motion• Reset
Picture: Trebuchet
Parts of a Trebuchet“If a sling is made very much too short-roughly half
of its proper length-the rock will go straight up. If this should occur the correct response is to run away very fast.”- Tom Bullock
Beam
Frame
Sling
Counterweight
Trigger
Other Resources
My Personal Page Make your own Trebuchet Trebuchet T-Shirts Scientific American Article And More Links!
Sources“Trebuchet.” www.wikipedia.org. A wikimedia project. http://en.wikipedia.org/wiki/Trebuchet.
Jan 22, 2005
“Experimental Rconstruction of a Medieval Trebuchet.” The Medieval Centre Siege Engines. Dr. Peter Vemming Hansen. 1992. www.Middelaldercentret.dk/acta.html
“Medieval Siege.” Nova Online. PBS. January 2000. www.pbs.org/wgbh/nova/lostempires/trebuchet.
“Trebuchet:Some Experiments with Trebuchets.” Tom Bullock. January 22, 2005. www.tbullock.com/trebuchet.html
The Grey Company Trebuchet Page. The Grey Company. April 2004. http://members.iinet.net.au/~rmine/bctrebs.html
“The Trebuchet.” Scientific American Magazine. Scientific American Online Archives. July 1995. www.sciamarchive.org
Pictureswww.2md.dk/gw-warmaster/images/engines_of_war_and_seige/
www.bamsoftware.com/trebuchet
www.college.emory.edu/culpepper/Bakewell/period.hml
www.leidenuniv.nl/fsw/band/sinai/culture/CairoCitadel/cairocitadel.html
www.fordham.edu/history/smail/1300/images_and _texts/06-Trebuchet.htm
www.shjmuseum.gov.ae/museums/islamic/islam_arab.htm
www.physics.sfasu.edu/astro/courses.egrill.html
www.castlewales.com/trebuchet.html
www.rpgamer.com/games/other/pc/sbane/sbaneart.html
http://Nfo.edu/trebuche.htm