You are watching: How to make a potato luncher
In this instructable I"m going to teach you just how to construct the initial hairspray powered potato cannon. Sometims it is likewise called a potato gun. Make this cannon takes around an hour and $30. The perfect gun can shoot potatoes end 100 yards!!!
Building Materials-5 feet the 1.5" ABS (DWV) pipe-2 feet of 3" ABS pipe-A 3" come 1.5" reducer-A 3" threaded adapter-A 3" end cap-A BBQ ignitor (+1 Screw)-ABS cementConsumables-Cheap aerosol hairspray-Potatoes or similar legumesTools-Hacksaw-Drill
-Cut the 3" pipe to around 13" or a size you choose (the bigger the combustion chamber; the more gas; the much more boom)-Make certain the reducer fits end the pipe-Spread some ABS cement on the inside of the reducer and outside of one finish of the pipe, on slide the reducer onto the pipe with a twisting method-Repeat this for the threaded adapter-Repeat this because that the barrel (5" the 1.5" pipe)Make certain your gluing is excellent properly, you dont desire it come explode.
You probably saw in the last step a silver- BBQ lighter attached come the next of the pipe, i tried using this, but it no working, so ns bought an $8 ignitor.Drill a feet in the 3" pipe because that the steel lead native the ignitor come fit, mountain the ignitor utilizing screws provided, you have the right to slop part glue around the hole to make certain there no be a void where the flames will shoot out and also burn your arm......In bespeak to develop the arc (spark) to ignite the gas, there needs to it is in a steel contact between the command from the ignitor and also the metal chasis the the ignitor.If you an installed the ignitor v bolts into the pipe, bending the metal result in be within 1/4" of the bolt to do a spark,I yet put another screw in indigenous the other side, yet had to operation a item of wire from it to the steel chasis.Both techniques will work.
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Let the cement cure because that a couple hours.Firing:-Unscrew the end cap-Force a potato into the barrel (this is easier if friend sharpen the end of the barrel through a file)-Pack that down v a broom, make certain its still inside the barrel, and not the burning chamber-Spray some hair spray into the 3" pipe for 2-3seconds-Quickly screw the finish cap ago on-Point it at a 45 degree angle come maximize variety and push the ignitor