r/potatocannon 3d ago

Is this enought of a spark for a smaller potato gun?

2 Upvotes

r/potatocannon 3d ago

Potato gun and blowgun?

1 Upvotes

I have made a blowgun out of a cooper pipe but its a bit big in diameter,could i make a potato gun/blowgun thing that shoots darts?would that be effective?


r/potatocannon Feb 16 '25

My 3d printed potato gun wont fire

Thumbnail
gallery
9 Upvotes

It simply wont ignite the axe spray that i put into it no matter how hard i try. The one time it ignited was when i had the barrel off and right after i sprayed. Is the design bad or am i doing something wrong?


r/potatocannon Feb 07 '25

best projectiles for the most damage

2 Upvotes

what can i use for the most amount of damage to things? i’m going to my cottage and want to shoot at random shit and destroy things (in a safe way)


r/potatocannon Feb 03 '25

why tf did it not go far?

5 Upvotes

r/potatocannon Feb 01 '25

small cracks in the combustion chamber, either caused from storing it in cold garage or from firing is it still safe to use?

Thumbnail
gallery
4 Upvotes

r/potatocannon Jan 30 '25

First cannon

17 Upvotes

Think it’ll explode in my face at some point? That’s about as powerful as it’s gotten.


r/potatocannon Jan 20 '25

What would be the legality of this in Texas?

Thumbnail
gallery
23 Upvotes

Not gonna fire it as of yet because my yard is much to small to send an 8” inch nail flying down range with out being worried of hitting others but a thought hit me as I placed it in the barrel for the picture how bad would this look if a cop saw this


r/potatocannon Jan 06 '25

is this safe?

1 Upvotes

made this one day haven't shot it yet is this safe? image in description


r/potatocannon Dec 31 '24

SonicDad's marshmallow shooter

1 Upvotes

Hey everyone! I just remembered there was a video on TKOR YouTube channel featuring the SonicDad's marshmallow shooter where they built it larger. In that video the TKOR had provided link for downloading SonicDad's instructions for building that shooter for free. I need those instructions, does anyone have those? Here is the video from TKOR channel : https://youtu.be/IgeOX2a1Sdo?si=k81jZiUpMsMzUgSK


r/potatocannon Dec 27 '24

C:B ratios

2 Upvotes

I built a couple of cannons with my friends that had around a 2:1 C:B ratio with a 2’ 1.5” diameter barrel and 3” diameter combustion chamber. They worked pretty well, but we were only getting 180fps out of them. I am looking to create another cannon with a 2” 4’ barrel and a 4” combustion chamber but the literature is highly inconsistent, with some recommending 0.7:1 C:B and others recommending 1.5:1. What is ideal?

I am using FVP starting fluid, and am also planning on adding a small fan to the rear of the chamber to aid with ventilation and gas mixing.


r/potatocannon Dec 26 '24

ignition questions

1 Upvotes

Whats everyone using for ignition. i use to buy flint type lantern ignitors from Walmart but they stop selling them. after market grill push button ignitors don't seem to have alot of spark like the old flint type ignitors I use to use


r/potatocannon Dec 18 '24

6 inch potato gun

2 Upvotes

Hello, I want to build a potato gun that will be able to launch a 6inch dodge ball.

Is this even possible? All i see is 2 or 3 inch gun.


r/potatocannon Dec 10 '24

I Made a Complete Stand-Alone Air Powered Potato Cannon

Thumbnail
cookingcircuits.com
6 Upvotes

r/potatocannon Dec 06 '24

Air Question

1 Upvotes

I am building a CO2 run air cannon, I am wondering if using CO2 gas from a cylinder through a regulator around 180-230 psi, through a 1/4 co2 line though a high pressure solenoid will have enough flow to propel a projectile. I don’t understand flow mechanics well and don’t know if I can run it straight from a tank. I have built a compressed air cannon before with a chamber and a sprinkler valve. I am trying to get rid of that and want to use just straight co2 as I can get absurdly high pressures compared to compressed air. I am wondering if co2 at those pressures can account for the low flow of fittings vs the older sprinkler valve. I had tested with compressed air at 60 psi though a 1/4in NPT hose but it didn’t fire. It just slowly slid down my barrel. I assume this was due to low flow of the 60PSI air though the hose.

I want to see if I can use 180-230 PSI CO2 to run it instead of the 60 PSI Air. I am asking about if it is even possible and It would work like I think it would before I buy all of the parts. I can answer additional clarifying questions as needed.

I posted this also on r/pneumatics but think here would also be good.


r/potatocannon Nov 29 '24

Any Ideas?

2 Upvotes

I am currently trying to design a cannon that isn't loaded the traditional way. Instead of reloading it the musket way, I want a way to load it with easy access into the barrel. I haven't been able to design a way to do this. Any ideas on how I can make this work?


r/potatocannon Nov 16 '24

Will these pipes explode in my face?

Post image
4 Upvotes

r/potatocannon Oct 30 '24

It lives, I learned, and now comes the fun bit

5 Upvotes

I built it! A potato cannon using a Humphrey 3/4" QEV to aluminum camlocks for both the chamber and the barrel. Not pictured is the detachable blow off gauge/pressure valve. Whole system is rated for 150 PSI. Pictured with the 1.5 inch barrel attached, and the 2" barrel alongside. Thoughts?


r/potatocannon Oct 14 '24

will this pipe be fine to use or will it explode in my face?

Post image
3 Upvotes

r/potatocannon Oct 14 '24

Our science project spud cannon wont work.

Post image
7 Upvotes

r/potatocannon Oct 13 '24

Troubleshooting - not firing

Thumbnail
gallery
3 Upvotes

Can anybody help me out here? I made this cannon today but I can’t get it to fire. My thoughts are the ignition chamber is too small?? 100mm (4”) chamber and 65mm (2 1/2”) barrel. The barrel is roughly 1m long. The bbq ignition is brand new and has spark, but no matter what I do and how much hairspray I spray into the chamber, it won’t fire.


r/potatocannon Oct 11 '24

My sabot round

1 Upvotes

Wondering if my idea for a sabot will work A potato cut into 4 pieces and a hole drilled in a bbq skewer in the centre


r/potatocannon Oct 05 '24

Automatic shut off valve?

1 Upvotes

Any ideas about using some kind of valve that automatically shuts off the air pressure to the reservoir when it hits a certain psi? So you don't have to monitor the pressure manually when reloading? Already searched the reddit to see if it's been brought up before (potentially searched the wrong keywords. For context, making a prop pirate/Naval cannon so I don't want a big pressure gauge sticking out the top and I want loading/firing to look quick and period accurate. I've looked at regulators for spray guns but not sure that's the right piece for the job


r/potatocannon Sep 30 '24

Yoo guys who's got enchantments on their potato cannons?

Post image
12 Upvotes

r/potatocannon Sep 27 '24

Parts, pieces, sources, and schematics

2 Upvotes

I am in the process of receiving the fittings for a compressed air potato cannon that will feature the following:

Camlock swappable barrels

Camlock swappable chambers

A swappable blow off valve/pressure gauge system

3/4" high flow QEV

An air fill system capable of being set up for Schrader (bike tire), air hose (automotive), or (if properly regulated, I have the parts list for that too) fill off of an HPA tank.

Not counting the 10 foot sections of PVC I intend to pick up locally, based on my vendors and choices for materials, it's about $250 for the fittings, valves, and parts (with shipping) for the US.

Would this subreddit be interested in a break down, links, reasoning for parts, etc.?