“Worth it for the laugh, especially when something gets flung much further than expected!”
How I did it: Dave and I bought some wood and some tools from B&Q one day.
We assembled a frame based almost entirely on guess-work. We changed a few things around when we realised how wrong we were, then we left it for a few weeks.
When we finally got back to working on it we bought some cement and set it in an upturned CD spindle case with a closed hook sticking out. This turned out not to be weighty enough, so we bought some big bolts and stuck two bricks to the throwing arm.
I cut up one of my shoelaces from an old pair of trainers and tied a knot around a stone on one end and tied a loop in the other end.
A screw was sunk into the non-weighted end of the throwing arm and the looped end of the string was attached to that.
Using the tied up stone we pulled it down and through the middle of the trebuchet lifting the weighted end of the throwing arm. Letting go of the stone resulted in the stone being fired to the other end of my garden, hitting the fence with a loud and satisfying bang. 🙂
Lessons & tips:
- Actually work out and measure your angles correctly.
- Make sure the base is wide enough for the weight you’re going to use.
- Make sure that the arms holding the axle are supported so that they don’t move/rattle around too much.
Resources:
- Wood
- Screws
- Shoe lace
- Heavy stone
- Heavier bricks
- Bolts to hold bricks
- Trips to B&Q
- Guesswork
It took me 3 days.
It made me jump and laugh. 