Introduction: Spring Powered Bow, Simple But POWERFUL!
Today I show you, how to make a simple but powerful bow. Making the limbs out of something flexible is a pain,
even finding good material for it. We just use tough metal and some wood :>
Material / tools:
- soldering iron, laser module, Li button cell, solder and 2 pieces of wire (optional)
- M5 screws and nuts (or similar)
- 2 STRONG (!) tension springs (mine are 40kg /75lbs)
- Bow string (I used 48 inches long string found on ebay for 5 bucks)
- Short pieces of tubing, 5mm inner diameter at least, 15-20mm long
Step 1: The Grip, Made From an Old Shelf
You need a saw and a drill (5mm if you, like me, use M5 srews and nuts). Print out the template, make sure its around 270mm long) and glue it on the plank, then cut it out, file the edges, sand em, and we are ready to move on.
Step 2: The Limbs
4 identical (nobody said it needs to be PERFECT though) pieces of Aluminum, 4-5mm thick.
Cut out, add a tubing in the middle to keep the right distance. Length depends on the thickness of
your wood (gnihi).
Make sure there is a tubing at the tips, attaching the string to a threaded rod / screw won't work for long,
so cover it with.
Step 3: Reinforcement-plates
Cut out 4 of them, the outlines match the outlines of the grip. 2 holes through one of them,
put it on your grip, mark the holes, drill through and don't forget the springs. Repeat, and off to the next step!
Next and last step is the bow string. I attached it to one end, across the tips and back into the limb,
where I drilled an additional hole (2 holes), to make sure there is a basic tension on the bow.
Step 4: Instructional Video
Showing most of the steps, not in detail, because it really depends on your springs.
Now go for it, its worth the time and effort ^^