My goal for this project was to create a hand-held weapon that I could use to hunt small (or possibly large) game. This is an original design I adapted from a tabletop crossbow (which I based on an ancient roman weapon) I made last Christmas as a gift for my brother. I would say this project is intermediate level, but a determined beginner could do well also. My wife encouraged me to document the process and share it as my first Instructable. I have used my scorpion to target shoot, but have not yet had a chance to take it hunting. It shoots as accurately as I could hope for in a homemade weapon, and I believe with enough power to kill small game. I will update if/when I am able to use it for hunting.
You will be using power and hand tools for this project, so of course proper safety precautions are a must!
Step 1: Equipment and Supplies
I had several board feet of red oak saw-mill grade lumber in my shop so I planed down a 5 ft board to 3/4" thickness and another 5 feet to 1/2" thickness. You could use any hard or soft wood you have laying around the shop. See Materials list below if you will be buying from a lumber yard. Be careful with soft woods. They may not hold up to actually firing an arrow. The only other materials you'll need are some parachute chord (also known as 550), a small spring from any cheap pen,small finish nails and wood glue. You could use some other nylon string but the small strands inside the 550 are very strong and worked great for me.
1" x 8" x 6' hardwood board (this will actually only be 3/4" thick)
1" x 4" x 6' hardwood board (if you don't have the means to plane down to 1/2", DON'T buy a thinner board. Use 1" x 4" and adjust the tenon measurements as noted on the following step. Your crossbow will be a bit heavier than mine.)
24 feet para-cord for springs
cheap click pen (for the spring) or make your own
wood glue (I used Gorilla brand)
You'll also need...
Ruler/ Tape measure
Scroll Saw / Jig Saw
Rotary tool/ Dremel
Drill or Drill Press
Belt or Orbital Sander
You don't need all these power tools. They just speed up the work.