In this instructable, I will be showing you how to make a tube slingshot using items from your local hardware store. This is a relatively simple project that will only require basic items, and is very easy to use. All you need are the items listed below, and relatively strong arms.
1 inch diameter PVC piping. The length of piping is up to you to choose, but it is best to choose a length between 2- 3 feet.
1 inch diameter wooden dowel. It must be able to fit in the PVC pipe with ease and be the same length as the PVC pipe or longer, otherwise it will not work.
2 slingshot replacement bands. If these cannot be found, regular rubber tubing can be used. However, slingshot bands have pouches that can help in a later step.
Twine or rope. in my case I recycled a pair of shoelaces from and old pair of shoes.
a nail or screw.
Step 1: Measuring and Cutting the Hammer
Cut the wooden dowel so that it is two inches shorter than the PVC pipe. Use sandpaper to smooth out any rough edges on the cut end, and make sure that the dowel still fits inside and can move freely. This shall be the hammer for the catapult. Recycle the excess wood.
It is also helpful, but unnecessary, to put small, evenly spaced holes in the dowel in order to lighten it. . In order to do this, make a marking 3 inches away from one end. Using a 1/8 inch drill bit, bore a hole through the dowel. Then choose a larger drill bit, between 1/4 and 1/2 inch in diameter, line it up with the pilot hole, and bore another hole through, being careful not to apply too much force. Do this at regular intervals and stop within 3 inches of the other end. While this does make the dowel weaker, since it will be protected by the pipe on the outside, there is not much chance of the dowel breaking inside the barrel unless it is hit with a lot of force, which would probably break the piping too.
Step 2: Finishing the Hammer
Line up the middle( the pouches in this case) of each band on one end of the dowel, making a plus from the top(see the picture). Using a screw or nail, attach the bands to the end of the dowel tightly. If you do not have the slingshot pouches, leave a part of the nail/screw exposed, then wrap the bands around and tie them in place. Pull on each band in order to make sure that it is attached firmly.
Step 3: Attaching the Bands to the Frame
Pull the bands slightly taut and hold them in place. Tie a string very tightly around the ends, making sure they are all evenly stretched. Wrap it multiple times around the bands to ensure they stay in place. Wrap some tape around the string in order to hold it in place when in use.
When tying the string, if you do not have a clamp to hold the bands, It helps to hold one end of the string in the hand that is holding the bands, and then wrap it around.
Step 4: Attaching the Handle
this loop allows you to grab the end of the hammer without pinching your fingers on the PVC. Look to the picture for help.
Step 5: Notes
Do not aim this device at people or property. Be especially careful when making and using this device as errors in workmanship and the quality of the items used can affect operation greatly. Always be wary of your surroundings when using this and check with your local law enforcement to make sure this is legal where you live(The states of Massachusetts, Rhode Island, and New Jersey have outlawed slingshots)
Thanks to my parents for supplying materials, tools, and motivation(even though I paid for the first two). leave any comments if you have a way to make this more awesome, or if you have problems with operation or construction.