How to Make a Mini Dart Gun W/Multiple Fire Modes

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Introduction: How to Make a Mini Dart Gun W/Multiple Fire Modes

About: I like turning boring things into awesome things! Usually on video.

I've been playing with the idea of what cool things I might be able to do with soda bottle preforms for a little while now and this is what I've come up with. The dart gun in this video uses two different firing methods that are commonly used in larger potato cannons, a pneumatic firing option, as well as a simple combustion option. A coaxial piston valve is my personal favorite mechanism for these sort of projects, and this video shows how it works quite well through the clear chamber. For the combustion design the fuel of choice is isopropyl alcohol, preferably 70% or greater.

How I made the darts in this video: http://youtu.be/BRUYdmOKLyM

How to make a mini cannon from a lighter (another mini airsoft cannon): http://youtu.be/QGj8xMDRSQ0

How to make water bottle rockets: http://youtu.be/YRtFY_O0HcU

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    21 Discussions

    Where did you get the soda bottle preform

    how many lighters do you go through in a week? because you use a lot of peso electric igniters.

    Is there a way to fire 3 or 4 airsoft bbs at one time

    1 reply

    I made two versions of this project (awesome, btw):

    1. With a 10 oz water bottle. works great

    2. With a 2 L pop bottle. Held more air, so it shot farther.

    Thanks for another cool project!

    Would alcohol out of the bottle work like vodka for example work as fuel for a spud gun project

    what if you were to use the hydrogen gas you explained how to make in a previous video as a fuel source? I've always had that thought and have made a few alcohol fueled mini dart guns but have yet to try hydrogen gas so what do you think nighthawk would it work? Future video? It would be pretty fun to try

    well I shaved it down with a file and it's still a really tight fit

    how do you make the piston I am trying to make a coaxial gun with a marker and a airsoft barrel but the piston I made is too tight of a fit in the marker and it won't move should I be concerned

    1 reply

    Great idea by the way

    Can you link a website for the performs

    Would deodorant work as a propellant as well or any other flammable liquid

    1 reply

    Ingenious project! I like how you used the soda cap as the release for the coaxial piston gun version... I'll have to make one sometime:D How much pressure was it at when you fired it?
    Thanks,
    Kyle

    1 reply

    About 60-80psi. The preforms can stand many hundreds of psi before rupturing but the soda bottle caps are the weak spot and can only stand about 100 after they've had a hole drilled through for the valve.