Good power output.
No knock required on arrows.
Longer draw than a standard bow.
So very! light.
Simple to build.
Cheap - cost £2.50 for proper catapult rubber preferred by the Chinese apparently (big following of catapults).
Pimp this up and she would be awesome - I kinda like her dirty and visceral though.
Easily shoot 20 meters.
Would work well for short range hunting of small game or fish.
Ammo carried on the frame.
Step 1: Materials and tools
saw to cut the bike rim - scissors - Snips or some way to remove the spokes from the wheel - file to tidy cuts - pliers to bend.
Materials for the basic build -
Bike wheel - eyelets of some description - inner tube from wheel - catapult rubber (or you can use cut down inner tube but it is not as powerful) - retainers for the threaded end of the eyelets (plasterboard expanding grommets in this case) - a spoke for the sight
Step 2: Lets go
So - take your scrap wheel and strip it down to it's constituent parts - clean up the body/frame - strip down the spindle and remove the bearings etc..
Take a saw and cut the rim/wheel in half between two holes - cool cos you get a spare frame to pimp up if you like the performance of the first build rather than breaking it down or adding things on. Clean up the corners and round off any sharp edges.
This rim is a 29inch so for position of the eyelets I will assume you are using the same size.