Air Cannon Fun!

[jwades10992]

@suzuki834 you my friend are incorrect to a certain extent

[Rogue254FPS]

do have instructions you can send me via email on how to make this?

[TheElevatr]

Lol, grapefruit.

[vespermk]

Way to much pressure. As you found out you got fruit juice instead of a whole intact projectile going as far as it could. I have an air canon with an 80 gal tank and we run 30 PSI. we shoot 8" pumpkins over 1200 feet. Get a bigger air tank. You'll be better off with more CFM then PSI

[brewerslover12]

oh your good at counting

[suzuki834]

longer barrel= more acceleration time

[drummerboypaddy]

What are you doing there omg bobs!

[theclay333]

Yea, i used that program when designing the cannon just to get some idea on how far it could go.

[theclay333]

the "valve" was a metal disk essentially made from layers of thin aluminum between the barrel and chamber. the barrel was made from 4" copper pipe, while the chamber was 6" PVC

[WobblyFiddle]

how was it triggered?

[theclay333]

it was triggered by the air pressure overcoming the disks between the barrel and chamber, literally bursting out. i chose this option because it was the largest and quickest option for getting all the air out

[WobblyFiddle]

at the same time though you have no way of knowing exactly when its gonna trigger. have you heard of using a Coaxial Piston Valve?

[theclay333]

it wasnt something we were worried about controling the timing, but those coax piston valves are like the "supah" valves right? someone else for this competition used one of those, we didnt have the budget for one, most of the materials used for that didnt cost us anything

[Technician1002]

If you buy valves they can be expensive. If you build your own, they don't have to be. I have a video on a home built quick dump valve. O rings were 30 cents each. The valve body is made from an iron pipe nipple. The valve core is made from HDPE cutting board stock. For a cheap tank, I used a disposable propane tank in the little one and a Freon tank for the large one. The golf ball was free.

[spudinator1]

using a program for calculating the performance of pneumatic cannons(called ggdt) i was able to determine based upon how you cannon looks and what valve your using that you achieved roughly 350fps, 4800 ft/lbs and 1587feet with the first 120psi shot, :) so you were close with the 490m guesstimate

[bimbolino14]

wheres th valve

[MadnessFanMS]

This song isn't FROM halo 3, i think its just used the most often in montages and stuff.

[theclay333]

its from the halo 2 soundtrack..dont know if it was ever actually in game tho

[stevo2themax]

it is in the later part of the game when you see a bunch of high ranking elites and brutes fighting in a circular room. they play the song, but without the vocals.

[stevo2themax]

it is in the later part of the game when you see a bunch of high ranking elites and brutes fighting in a circular room. they play the song, but without the vocals.

[phoenix546]

whats the name of the song from halo3?

[themcniels]

uhm. it;s from braking benjamin i tought...uhm

[Gollum19]

Song is Breaking Benjamin - Blow me away

[themcniels]

yea. that was it

[joshwebb1023]

what kind of valve did you use?

[theclay333]

a burst disk, basically a piece of metal holding back all the pressure till it burst

[SlavaVB]

why metal? its 120 psi... why not something that shatters like tempered glass or ceramics

[0000HIM0000]

nice video

[Elilonnie]

Yes honor thy plumber Eddie Rosecrants for this cannon would have been much more expensive without all the free pvc and copper good vid guys next time we make a vid i wann shoot out abag of 500 rounds of paintballs