This instructable will show you how to make a repeating crossbow, also called a "Zhuge nu" or "chu ko nu." This is a type of crossbow invented in China thousands of years ago that is like an ancient submachine gun. Just push the lever forward and back and it will fire a steady stream of arrows until the magazine is empty. It doesn't have that much power or accuracy compaired to a normal crossbow but it has a fast firing rate and is easy to use.
I have included an instructional video and a step-by-step photo instructable. If you have any questions or any of these instructions are unclear to you please let me know and I will try to clearify.
I think this instructable meets the requirements of the Epilog challenge and the Launch it! contest so I am entering it in those.
Step 1: Gather Materials
You will need:
-A 2x4 in any type of wood, prefer few defects of course (at least 27" long)
-1/2" Sch 40 PVC pipe (at least 22" long)
-Red oak 1x2 (53" or more, other hardwoods are OK)
-A 1/2" x 5.5" x 48" poplar board
-3/8" poplar dowels (recommend three 48" dowels)
-5/16" dowel (at least 10")
-Larger dowel, 3/4" to 1" diameter (at least 6" long)
-hot glue stick
-String (I used 9/16" venetian blind chord, it is mixed polymers)
-Two 1/4-20 bolts, 3" long, with nuts.
-Wood screws (at least 6, ones that are 2"-3" long would be great)
-Spray on clear coat
-Brown spray paint
-1.5" wide hinge
-1.5" wide by 1/4" thick oak or poplar board (10")
All of that is available at a hardware store, mine was from Lowes mostly.