Intro: How to Make a Small Spring Cannon
For shooting marbles, erasers, pickle harpoons, and other small things.
Step 1: Gather Supplies
you will need these things for this project;
1/2 in copper pipe
1/2 in wooden dowel
bandsaw (or hacksaw)
Step 2: Cut the Pipe
cut about five inches off of the pipe.
about 1 1/2 inches down the pipe cut halfway through
then cut down the middle of it until you reach the second cut.
it should look like this.
Step 3: Make the Spring Assembly
cut a 1/4 in piece off the dowel
drill a 1/16 hole in the center.
cut the straight part of the wire hanger
use the pliers to bend 1/4 in of the end at a right angle
put the wire through the wood an the spring
Step 4: Finish It
use the pliers to crush the pipe at the 1/2 cut part. (not all the way)
put the spring assembly in the pipe.
pull it down to where it starts to compress the spring.
and bend the wire.
cut the excess wire
Step 5: How to Fire
pull the bent wire back and turn it so it catches on the half pipe
give the bent wire a half turn to shoot