Here’s a clever way to recycle and reuse an old bicycle wheel! [Darren] came up with this idea a while ago, and unable to find any mention of it on the internet, he decided to make his own — He calls it the Bike Wheel Bow.
Now technically it may look like a bow, but it’s actually more of a bow-like-sling-shot, as it relies on stretch of the string (which is rubber tubing) instead of the bow itself — regardless though, it’s a cool piece of kit.
[Darren] chopped up a bicycle wheel, removed the spokes, and was left with a nice semi circle. Using regular old eyelets he installed them around the perimeter giving it a bit of a compound bow look. He’s using rubber medical tubing with a section of bicycle inner-tube in the middle which provides a fold, allowing you to shoot arrows without knocks. You can use the inner-tube for the whole thing, but it’s not as powerful.
For a bow made out of almost entirely recycled parts, it’s pretty good — he’s even made an arrow rest using the hub and a bent spoke. The only caveat to the design is the rubber tends to stick on the eyelets — it’s best to lube them up a bit before shooting. Alternatively a few $1 pulleys might work even better!
If you’re looking for a more traditional home-made bow build, why not use a pair of cross country skis? Or if you’re alone in the woods, make one completely from scratch!
Last year, [Tony] was asked to develop a lasertag system with ultimate realism. This meant a system that used a blank firing replica gun, and a system to detect blank rounds being fired. Very cool, 
