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Ok, Now It's Time For the Tricky Stuff

Triggers, pins, and strings. Why does that sound bad?

Undoubtedly, the most crucial part of building a trebuchet is all the things I will be talking about next. Of course, however, some personal tweaking on your part is more than likely. Nevertheless, I will give you a very close idea as to what you need to do.

Release Pin:

I will be explaining how to install this part of the trebuchet as if you were to have to beams attached together. You can, however, do this same sort of procedure with only one beam as the throwing arm.

Ok, you need to whip out your 1/8" steel rod and cut it down to about 7" or 8". You can use most basic pliers for this (if you have pretty strong hands).

Ok, now, as you can see, I have inserted the skinny steel rod in between the two boards that make up the throwing arm. Put it in there about 3/4" from the top of the beam and then use a hammer to lightly tap the rod into the wood even further. You should, ideally, have about 4" of the rod in the wood and about 3"- 4" sticking about.

The above picture now has jute twine wrapped around the boards to squeeze the rod in between the two boards. While wrapping the arm with the twine, pull as tightly as possible on every wrap cycle. wrap as far as the rod goes.

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