Picture of Double-Barrel Shotfun
It was just a spelling mistake in a humorous sub-thread, but it eventually became...

The Double-Barrel Shotfun - dealing out enjoyment at the pull of a trigger!

It's just what you needed - an overly-complex method of firing off two party-poppers at once.

(You can now accessorise your Shotfun with a dedicated bandolier!)

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Step 1: Materials and tools

Picture of Materials and tools

You can modify this project to your needs, but this is what I used:
  • 4mm plywood sheet
  • Offcut of 6mm plywood
  • 32mm waste pipe
  • Industrial adhesive
  • Masking tape
  • 6mm dowel
  • Scrap corrugated card
The tool list is flexible - I used a laser cutter, but only because I could.  Similar results could be achieved with skilled use of traditional power and hand tools.
  • Lasercutter
  • Scrollsaw
  • Teaspoon
  • Files
  • Sander
  • Rubber mallet

Step 2: Prototyping

Picture of Prototyping
I first needed to prove that my idea worked.

This quick lash-up proved that a steady pull via a lever would work to fire a party popper.

Step 3: Lock, stock...

Picture of Lock, stock...

Once the concept was proven, I needed to stream-line it. I drew the laser cutting files in LaserCAM 2D, purely because it's the software my school bought with the laser cutter.  You can reproduce your own version in whatever software you prefer.

I designed most of it to be out of 4mm ply, but I decided that the section that would brace the poppers (the part that looks a liitle bit like a heart, and a little like a Batman logo) needed to be stronger, so I cut that out of 6mm plywood.

I took a screenshot of the design that you can use - the odd layout is to fit the piece of plywood I had close to hand.

The MCM file itself is in the zip folder with this step.  It's not huge, it just isn't recognised by the uploader if you leave it as an MCM.
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Snibril7 months ago

I used your idea as a base, cut out the shapes from plywood using a jigsaw and it works. I can report though that knotting the string together and looping them over the trigger only fires one shot, the second one does nothing once the string's out. Works for firing the poppers and actually aims the streamers. :)

Kiteman (author)  Snibril7 months ago

Maybe, if you knot closer to the popper?

It would be cool if you could post a photo of your version, or even a video?

Snibril Kiteman7 months ago

Can't get the knot any closer, so cut a slot in the top of the trigger as with your design, works fine. I'm tempted to cut an actual trigger design into it, just for the look of it. :)

The angle's a bit odd on the photos as I had to fit it all in frame at arms length.

What do they use for a charge?
Kiteman (author)  coolbeansbaby682 years ago
The party poppers? It's a small cylinder on the end of the string - when you pull the string out, friction between what's on the string and the lining of the cylinder trigger the explosion. It's very like a match, but faster.
so is it a form of gun powder?? Hm,mmmm how could ya get a bigger bang out of it ?? Ya got me thinking kiteman lol
Kiteman (author)  coolbeansbaby682 years ago
Packing the stem with gunpowder, instead of flower?

Be careful of the back-blast.
Stan1y Kiteman7 months ago
even a small quantity results in total disintegration. was very glad I'd extended the pull stringt and was 20m away
Kiteman (author)  Stan1y7 months ago

Gosh - do you have images of the result?

Stan1y Kiteman7 months ago

was many years ago before digital cameras were so wide spread so I'm afraid not

Hmmm. How about a. Shotgun primer or a rifle shell primer?
Kiteman (author)  coolbeansbaby682 years ago
They're your fingers...
or eyes.....
Stan1y1 year ago
having experimented with alternative loads for party poppers don't use blow pipe snaps they go off inside the party popper
Kiteman (author)  Stan1y1 year ago

That might make a good bang inside the barrels, though...

Xixfas2 years ago
I live your adhesive!! Sticks like sh*t!! Lol
Kiteman (author)  Xixfas2 years ago
It does exactly what it says on the tin.
Xixfas Kiteman1 year ago
Very cool, I like it!
ynze1 year ago
Congrats with a very honorable Epilog Prize :-)
Kiteman (author)  ynze1 year ago
Thank you!
Colleen46142 years ago
This is cool
Kiteman (author)  Colleen46142 years ago
Colleen46142 years ago
Now this is what i'm talkin about!!!
Kiteman (author)  Colleen46142 years ago
Thank you, I think.
Honus2 years ago
I have to make this for my boys!
Kiteman (author)  Honus2 years ago
Cool - post pictures when you do.
HollyMann2 years ago
Kiteman (author)  HollyMann2 years ago
Thank you!
I love this build. I was thinking if you tied the strings of two poppers together you could just load, put the loop over the hammer, and be able to quickly fire and reload.

Great job, may have to make one myself!
M.C. Langer2 years ago
Awesome project, Kiteman!!! :-)
Kiteman (author)  M.C. Langer2 years ago
Thank you!
You're welcome!
TheGeek19842 years ago
Lol, my cousin and I bought a ton of these one time with the intent to turn them all into trip-wire traps that would blow flour or powdered sugar at the person who tripped it. We couldn't devise a way that gave us a repeated success, so we ended up storing them until we could revise our plan. Then we forgot about them. I had a few in my car and a friend asked if she could fire one off when my cousin got back into the front seat, so I said sure. I'm still finding powdered sugar in my car.
Kiteman (author)  TheGeek19842 years ago
Alex Dee2 years ago
Yes i finally finished college and finally have a bunch of free time to put on this website.

Can't wait to start
Kiteman (author)  Alex Dee2 years ago
You finished college??

I feel old...
Alex Dee2 years ago
This must of been great fun to make and use. :)
Kiteman (author)  Alex Dee2 years ago
Hey, SG! Long time, no type!

Yes, it was!
This is great! I love the idea!
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