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Step 6The Throwing Arm
The arm of the trebuchet is more complex than the arm of the catapult, as it has been modified to increase the leverage of the string's pull.
Cut out the long section, pierce the holes and crease the lines.
Glue one of the long sections, and fold it into a long beam.
Glue the small tabs at the square end, and fold them over.
Fold the small tabs over at the wedge-shaped end, then glue the long tab over them.
Crease the pivot-section, then lay the square end into the pivot section, line up the holes and glue it in place.
Glue the long narrow flap, and wrap it around the pivot section, over the back of it and along the beam.
I also added two sections to glue on the side, with the intention of holding the thread in place during firing. They may prove to be unnecessary, but I added them anyway.
Cut out the long section, pierce the holes and crease the lines.
Glue one of the long sections, and fold it into a long beam.
Glue the small tabs at the square end, and fold them over.
Fold the small tabs over at the wedge-shaped end, then glue the long tab over them.
Crease the pivot-section, then lay the square end into the pivot section, line up the holes and glue it in place.
Glue the long narrow flap, and wrap it around the pivot section, over the back of it and along the beam.
I also added two sections to glue on the side, with the intention of holding the thread in place during firing. They may prove to be unnecessary, but I added them anyway.
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