1:25 @ A1Trebuchet Base This drawing and its content is Copyright. It may be used once for its intended purpose only under a contract with The Framing Yard, Loch of Lintrathen, Kirriemuir, Angus, DD8 5JAtel 01575 560393 fax 01575 560295Carpenter Oak & Woodland Co. Ltd.NOTES.....................................................XF? dwg CF?? - denotes Framenumber, drawing
number and directionof viewCurved timbers aresubject to availability
of curved grain oakand deflection may bedifferent than shownon drawing
IIdenotes adjacent timbers faced flushrefer to frame Engineer's calculations
for Green Oak timbergradeshttp://www.getwoodworking.com August 2019 The Woodworker incorporating Good Woodworking 81
Building the world’s largest
working siege machine
In 2005, Carpenter Oak Ltd undertook the
construction of the world’s largest working siege
machine as a commission for Warwick Castle at
their Wiltshire yard. The trebuchet was 18m tall
and made from over 300 pieces of oak, weighing
in at 22 tonnes (photo 1). The siege machine was
built with drawings from the Danish living history
museum, Middelaldercentret. The research into
the construction of the medieval trebuchet was
initially undertaken by Dr Peter Vemming. Under
his guidance, the Warwick Castle trebuchet was
constructed at the Wiltshire yard. It was made
largely of oak with a long throwing arm
consisting of more flexible ash.How it works: main component parts
A trebuchet works with gravity. Essentially,
this siege engine owes its origins to the ancient
sling and has been used by many cultures down
through the ages. It basically consists of five main
parts: the frame, counterweight, firing arm, sling
and guide chute (photos 1 & 2 ). The firing arm
and counterweight are like the long and short 5 Detailed drawings of the trebuchet base