Quick Answer
You can build at least five figure-4 triggers from a single branch with a suitable diameter, depending on the branch's length and the trigger's complexity. This assumes a moderate to large branch of at least 1.5 inches in diameter and 4-6 feet in length. More triggers can be built with longer and thicker branches.
Branch Selection and Preparation
When selecting a branch for building figure-4 triggers, look for straight, sturdy material with a diameter of at least 1.5 inches and a length of 4-6 feet. Cut the branch to the desired length, leaving no knots or weak points, and inspect it for any signs of rot or damage. A healthy, straight branch is essential for building reliable triggers.
Trigger Building Techniques
To build a figure-4 trigger, start by cutting the branch into two sections, one 2-3 feet long and the other 1-2 feet long. Use a sharp knife or pruning saw to make precise cuts. Next, use a bow drill or hand drill to create a small notch at each end of the shorter section, about 0.5 inches deep and 1 inch long. This notch will serve as the trigger’s fulcrum. Use a small stick or rock to create a small notch on the longer section, about 0.25 inches deep and 0.5 inches long, 1 inch from the end. This notch will serve as the trigger’s pivot point.
Trigger Assembly and Testing
To assemble the trigger, place the longer section across a stable surface, with the pivot notch facing downwards. Place the shorter section across the longer section, with the fulcrum notches aligned. Use a small stick or rock to secure the trigger in place, making sure it’s stable and even. Test the trigger by gently applying pressure to the shorter section, which should cause the longer section to pivot and spring back into place. Repeat this process several times to ensure the trigger is reliable and functional.
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