Mini Potato Launcher




mini launcher, cheap to build and fires up to 30m!

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: Parts

-2 bottles -(coca-cola)
-piezo (lighters off bbq's)
-texter or pen (connectoer pens work best)
-pvc glue
-2 screws
-tape (i used making tape, it works better)
-1 inch pvc pipe
-lynx deodourant ( or a cheap copy )

Step 2: Putting Together or Construction

1. Cut 4 to 6 inches of (1 inch) pvc pipe. It won't matter how long, but I made mine about 5 inch.
2. Then cut away the thread and rib of the bottles ( where the lid screws on, include the whole thread and rib).
3. In one of the lids, cut a hole just big enough fo the pen to push into(with force).
4. Glue the pen into the lid
5. Once that dries, glue the bottle threads inside the pipe. ( u may need to file the rib at the end of the thread, so that it will fit into the pipe).
6. Now make sure the lids screw on
7. drill two holes in the pipe, and screw in the ...screws. check that they are about half a cm from touching each other inside. because the spark from the piezo has to jump across the screws to ignite the gas.
8. screw the cables from your piezo to the screws on the pipe

Step 3: Aim..... Fire!

!!!!!!Make sure the glue is dry b4 testing!!!!!!

-to fire
1. push the end of the pen into a potato, then make sure the potato is pushed down further into the pen.
2. unscrew the lid on the opposing side
3. get some deodourant, body spray type works better than powder.
4. spray some deodourant inside the pipe, when spraying- hold can 6inches away from pipe ( this makes sure the gas, oxygen and the liquid are put inside) trust me, u need all three.
5. put the cap back on quickly, aim and fire by pushing the button on your piezo.

-- my one shoots about 25 meters, depending on what type of deodourant is used. (some work better than others)

~If u make this instructable, please note that I will not be held responsible for any injuries. one more thing, dont use ball bearings! wink, wink. they are dangerous!



    • Make It Fly Challenge

      Make It Fly Challenge
    • Stone Concrete and Cement Contest

      Stone Concrete and Cement Contest
    • Indoor Lighting Contest

      Indoor Lighting Contest

    19 Discussions


    10 years ago on Step 1

    can u make some catapults i like some of your instructables but i love catapults =)

    1 reply

    11 years ago on Introduction

    An alternative to the pop bottles would be to use PVC to pipe thread fittings with plugs or caps (depending on whether you get the male or female fittings). It'll cost more of course, but it's another way. I've also heard that the best fuel for spud guns is the cheapest hair spray you can get (as long as it's flammable).

    3 replies

    Reply 10 years ago on Introduction

    I'm aware that pipe ends and such are available for 3 inch diameters, but do suitable ones exist for mini builds? I have yet to come across any.


    Reply 11 years ago on Introduction

    actually, the best thing is to have a film canister as combustion chamber or an empty pill canister, both good. and methylated spirits is good, it can be applied to the bottle as a liquid and not a spray..


    Reply 10 years ago on Introduction

    You can drill a small hole just big enough to put a match into. This method is not safe, but it's the most effective (more so than piezo sparkers). Wear some sort of glove if you do it this way. You can also try getting one of those incense sticks, those should work tool

    logic bomb

    11 years ago on Introduction

    O.K....I am a lil slow on this one. Could you post a video along with this. It sure would help those of us that road the short school bus.

    2 replies

    Reply 11 years ago on Introduction

    the writing seems complicated but if u get a general idea of wat a potatoe cannon is then look at the pics (specialy the final one) u can patch it together yourself


    11 years ago on Introduction

    Be careful with this AKA Don't take this to school I made one similar to this and I got two months of alternative school and a ticket


    11 years ago on Introduction

    dangerous! you didnt say something like "im not responsible for what you or your stupid friends do with this". and also "do not point at humans, animals or any other thing that if you shoot at the owner will sue your ***". except for that; nice instroctable! -gamer