Instructables
Picture of T-shirt Cannon
Everybody has wanted to build a B.F.G. This time it was my turn, so i built a T-shirt cannon to blow the minds of crazed fans and students
 
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Step 1: Research

Picture of Research
for my cannon I would like to use it at rallys and school football games so it had to:

-shoot multiple shirts on one charge

-have enough power to project the shirts a good distance

-be reasonably priced and portable

so after a bit of research i found this video



It had everything i needed, so instead of buying his modestly priced gun of $560 dollars, I set out to build my own for less than $100.

Step 2: Parts List

p1020050.jpg
WORD OF WARNING! MAKE SURE YOU DRY FIT ALL OF YOUR PARTS BEFORE LEAVING THE HARDWARE STORE! SAVES TONS OF TIME. I AM IN NO WAY RESPONSIBLE IF YOU HURT YOURSELF!!

Tanks:
- 4" diameter PVC 2 foot length
- 3" diameter PVC 2 feet total cut into foot long sections
- 4" PVC caps x2
- 3" PVC cap

next set of parts is to reduce from 3" to 1". if you find a cheaper way ignore my parts list
- 3"coupler x2
- 3" to 1.25" reducer x2
- 1.25" to 1" recucer x2
- foot length of 1" PVC
- 1" slip to 1" threaded adapter x2

Plumbing:
- 1" sprinkler valve
- foot length of 1/4" hose (get one that is properly rated)
- 1/4" hose adapter (hose barb) to 1/8" threaded x2
- 1/8" nipple x2
- 1/8" elbow
- 1/8" valve
- small hose clamp x2
- Teflon tape
- bike pump valve (can be replaced with a air compressor adapter)
- Epoxy
- PSI gauge

Tools:
- Drill
- various drill bits
- PVC cement and primer
- Popsicle stick
- Duct tape (optional)
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Kataze2 months ago

What kind of epoxy did you use and how did you apply it? Just dab it around the threads, or what?

hacker3455 (author)  Kataze2 months ago

I don't remember exactly what type of epoxy it was. I do remember that it was clear and could be handled after about 2 hours. Check the packaging for application surfaces to make sure you are getting the right stuff. And yes I would apply some to the threading, and a bit on both sides of the hole to seal inside and outside.

Masher0074 months ago

Danger: See link: This is not spam, but a warning. PVC will fail suddenly after a while. This was band member that hurt badly by a T-Shirt launcher explosion.

See the pictures and never use PVC to hold air, Please.

https://fundrazr.com/campaigns/1Zs3c
..

Masher0074 months ago

This is not spam, but a warning. PVC will fail suddenly after a while. This was band member that hurt badly by a T-Shirt launcher explosion.

https://fundrazr.com/campaigns/1Zs3c
..

TraciAG4 months ago

Thanks for the instructions on the electrical part.

My team in robotics needed me to build a release for our shooting mechanism, this worked easy!

hacker3455 (author)  TraciAG4 months ago

Great to hear that things worked out!

It worked but I do have a question about it:

I'm not electrical savvy, so I'm wondering why there was a need for a momentary and non-momentary switch?

I just used the momentary in mine, what did the "safety switch" do?

hacker3455 (author)  TraciAG4 months ago

The non-momentary switch interrupts the circuit acting like a safety. Therefore, unless the non-momentary switch is pressed, the gun cannot misfire.

awangler8 months ago
Hey man. I'm building a pop bottle launcher for my nephew for Christmas and I'm using the same concept of the sprinkler valve. However, I cannot get my solenoid to open the valve enough to release the pressurized air all at once. It just slowly releases a little air over a long duration. It's more than likely a power problem, but I'm out of ideas on what to try. Suggestions?
hacker3455 (author)  awangler7 months ago
Sorry I didn't get back to you in time for Christmas. The problem you're having might be due to the valve itself, perhaps try a different brand. For my gun, (if memory serves me correctly) if the firing tank's pressure was too low, then the air would just "flow" out rather than dumping the full contents. Of course fill to a pressure that you are confident with.
aschurger1 year ago
Wanted to say thanks for the instructable. I'm a physics teacher and we used this to launch eggs instead of the tired egg drop experiment. Kids loved it and it was a success.
hacker3455 (author)  aschurger1 year ago
Projectiles, the perfect way to captivate physics students
Absolutely fantastic. A couple of friends of mine own a minor league basketball team and mentioned a t-shirt cannon. So in the same spirit of this post, I offered to build one. I took the plans here and added a toy gun handle with a safety and trigger switch. Overall build time was about four hours not including cure time. So far it's been shot over 100 times (including a snowball fight) and is still going strong.
tshirt cannon painted.jpgtshirt cannon action.jpg
hacker3455 (author)  CaptainAwwsum1 year ago
Glad to hear you like the design!
HIRULE2 years ago
quick question did you do any math in order to build this gun. im having a bet with my friend
hacker3455 (author)  HIRULE2 years ago
What do you mean by math?
I think he means calculations
How far does everyone else's shoot? Mine only shoots about 20 meters.
ilpug3 years ago
Very nice! i might modify this whole system and mount it on something for some kind of airsoft monster gun.
ftball9993 years ago
I am currently building a nerf gun using that sprinkler valve, I am assuming that I will need multiple batteries but what is the purpose of the two switches? Thanks,
hacker3455 (author)  ftball9993 years ago
the non-momentary switch acts as a safety, therefore if it is not in the on position, the gun cannot be fired
Ah, thanks. I will be adding a second switch to my gun for that!
Pizzapie5003 years ago
What if my sprinkler valve runs on AC?
hacker3455 (author)  Pizzapie5003 years ago
Have you tried applying a DC current to the valve? If you still don't hear the clicking sound of the solenoid, look online for a DC to AC circuit design, thats all I can really suggest. Or find a valve that runs on DC.
Thank You! It runs perfectly on DC. I will probably do this on my anti siphon valve. 5*
knex_mepalm4 years ago
You might wanna make a hopper and tell everyone to looka t you then shoot them rapidly with t-shirts.
waterboyf54 years ago
you should so add a rotating chamber to it so you can load 6 at once.. but there might be a problem when you need to keep all the air centralized
hacker3455 (author)  waterboyf54 years ago
If I were to add a rotating barrel system I would keep the initial design but just unscrew the firing barrel and replace it with the multi-barrel attachment
that actually sounds a bit simpler than what i was going for. i just figured you could add a rotating chamber as a quick click on attachment but if your going for a permanent solution you should probably go with the rotating barrel system
idea on that. if you add it at the end to where the shirt just drops into the chamber wouldn't it work? although in the building process you would have to add a full circular backing to it so it doesn't just drop to the ground
hacker3455 (author)  waterboyf54 years ago
I would actually prefer the rotating barrel idea because you can get a much tighter seal around the shirt than if it is able to slide down. But then again you could load the gun with bolt action and probably get just as tight of a seal from the shirt ruffling up
well what i was figuring is make the barrels just big enough to easily slide the shirt in and have a backing to it so it will not fall out. that way you would keep your original setup and original seal and yet have a way to load a couple at a time. although you would also have to make a mechanism that times the rotation of the chamber
qazwsx7554 years ago
Awesome t-shirt cannon. But your sprinkler valve should be running at 24vac not 27vdc you are most likley going to burnout your valve that way.
hacker3455 (author)  qazwsx7554 years ago
That was always one one of my concerns but the fact that I'm not constantly supplying voltage to solenoid should prolong its "life expectancy".
omgiri4 years ago
you should so add a rotating chamber to it so you can load 6 at once.. but there might be a problem when you need to keep all the air centralized and the good...

PHTO0109.JPG
Delta254 years ago
lolwut!
spnw854 years ago
what is the purpose of the valve on the back of the gun? great design by the way!
hacker3455 (author)  spnw854 years ago
 The purpose of the 2nd valve is to recharge the firing tank after each shot. This eliminates the need to reattach and re-pressurize after each shot.
arthur927104 years ago
Where did you get the reducer from?
hacker3455 (author)  arthur927104 years ago
 All of my PVC parts i bought from OSH, you could probably find them somewhere else such as Lowe's or Home Depot.
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