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How to Make a Medieval Trebuchet Out of Cardboard

Step 8Making and Adding the Sling

Making and Adding the Sling
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Now you will be making the sling that holds whatever you are firing.

Depending on how big the items are that you will be throwing, your denim pouch will vary in size. My pouch was about 8 inches by 10 inches.

Take the edge of the side that is eight inches long and fold over about half of an inch. Sow this flap over and do the same on the opposite side. Slide your rope/cord through these folds. both these strings should be the same length. Take one of the strings (after you have fed it through) and tie it so that it makes one big loop. Leave the other string untied. See picture for clarity.

Drill a hole in the "arm" of the catapult on the side opposite of the counterweight. This hole should be just big enough for you rope/cord to fit through.

Take the untied rope/cord and feed it through this hole. Once it is run all the way through the hole, tie it to the other end of the rope/cord.

Take your six inch rod and poke it into the cardboard near the hole you just drilled.
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Author:ineverfinishanyth
I enjoy building and inventing; I have a specific interest in medieval and roman armor and weapons. I am a student in highschool currently and hope to study Mechanical Engineering in college at BYU. I...
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