This Instructable is a guide to building 2 simple traction trebuchets from a single bicycle.
One trebuchet uses the front forks and front wheel - the other uses the frame and bottom bracket.
With careful dismantling, use, and reassembly - there's no real reason why you couldn't use the bicycle for its intended purpose to go home again after you've slaughtered the enemy.
As with any mechanical devices, care is needed at all times when building, testing and operating them.
If you make these trebuchets, PLEASE BE CAREFUL in all aspects of their use.
This project arose from practical English language classes conducted in Phnom Penh. The students in those classes wrote the following "how to" guide after building and using their trebuchets.
No grammar books were harmed during the production of this Instructable.
That's enough from me - over to the students... see step 1
Step 1: You Will Need
a measuring tape
a socket set
T notes -
small spanners and sockets were used to tighten up the heavy-duty jubilee clips
Here are the materials that we need
a bicycle frame
a bicycle wheel
2 metal poles (3m each)
8 metal stakes
2 bamboo poles (2.5m)
an aluminium bar (2.5m)
a metal nail
strong cord (6m)
old jeans (to make the sling pouch)
T notes -
the rubber strip was cut from a heavy tyre inner-tube and was around 3m long and 1 inch wide
the aluminium bar was a box section found locally and used to try to lighten the throwing arm
the metal nail was used as an adjustable pin at the tip of the throwing arm
We need only $10 for each trebuchet, (if we already have a bicycle).