Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 47 users online :: 5 registered, 0 hidden and 42 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Pneumatic air cannon without proyectile

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

Pneumatic air cannon without proyectile

Unread postAuthor: jarm0591 » Sun Sep 06, 2009 11:45 pm

Hi everybody, I am going to do a school project related to air cannons and a have a noob question that i didn't found with the search function. I want to do a cannon but it has to shoot only air (projectiles are not allowed) and it has to throw some aluminum cans at different distances, my question is that if I do a pneumatic air cannon but i don't put any projectiles inside, will it shoot enough air to throw the cans?
and how far have to be the cans to throw they, ie around 20 feet between the cannon and the cans, do you think the cannon will be able to throw the cans?, or 50 feet maybe :D
I want to do a simple pneumatic cannon, something a noob at this can do, it has not to be very powerful.
Thanks for your answers.
  • 0


jarm0591
Private
Private
 
Posts: 3
Joined: Sun Sep 06, 2009 11:25 pm
Reputation: 0

Unread postAuthor: Crna Legija » Sun Sep 06, 2009 11:58 pm

can you get a barrel to fit the can in it ans have the can as your projectile. Thats what i would do.
  • 0

User avatar
Crna Legija
Major General
Major General
 
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Unread postAuthor: suburban spudgunner » Mon Sep 07, 2009 12:14 am

-_- wrote:can you get a barrel to fit the can in it ans have the can as your projectile. Thats what i would do.


That seems to go against the concept...

To throw a can from 20 feet (empty, I presume), you might want a somewhat large chamber, decent pressure (100+ psi), and a long, thin barrel to concentrate the pressure. A piston valve would probably work best, but if you don't want to mess with those, I would go with a modified sprinkler valve.
  • 0

The definition of insanity is doing the same thing over and over again and expecting different results.
User avatar
suburban spudgunner
Staff Sergeant
Staff Sergeant
 
Posts: 124
Joined: Mon Jan 05, 2009 4:08 pm
Location: Oak Lawn, Illinois, USA
Reputation: 0

Unread postAuthor: FORE!!!! » Mon Sep 07, 2009 12:14 am

i dont think he wants a projectile, he wants to blow high pressure air at a can :shock: sounds like fun,lol
  • 0

al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
User avatar
FORE!!!!
1st Lieutenant
1st Lieutenant
 
Posts: 277
Joined: Mon Jul 06, 2009 8:14 am
Reputation: 0

Unread postAuthor: geardog32 » Mon Sep 07, 2009 12:20 am

i bet if you built this you would get a A for sure. :twisted:
  • 0

(\ /)
(0.o)
(><) Copy the bunny to your sig and help him achieve world domination.
User avatar
geardog32
Master Sergeant
Master Sergeant
 
Posts: 173
Joined: Mon Jun 22, 2009 9:20 pm
Reputation: 0

Re: Pneumatic air cannon without proyectile

Unread postAuthor: Technician1002 » Mon Sep 07, 2009 12:41 am

jarm0591 wrote:Hi everybody, I am going to do a school project related to air cannons and a have a noob question that i didn't found with the search function. I want to do a cannon but it has to shoot only air (projectiles are not allowed) and it has to throw some aluminum cans at different distances, my question is that if I do a pneumatic air cannon but i don't put any projectiles inside, will it shoot enough air to throw the cans?
and how far have to be the cans to throw they, ie around 20 feet between the cannon and the cans, do you think the cannon will be able to throw the cans?, or 50 feet maybe :D
I want to do a simple pneumatic cannon, something a noob at this can do, it has not to be very powerful.
Thanks for your answers.


A well built air cannon has a very strong air blast. My 2 inch was able to toss an air impact wrench down a concrete floor from 3 feet away. I have a video online of my 1 inch tossing a plastic bucket from 3 feet away. A few empty tin cans would be no problem.

Do you have regulations limiting the air pressure tank size or other safety consideration you must comply with?

[youtube]http://www.youtube.com/watch?v=RmubzCSv9KU[/youtube]

Edit, I am considering building a vortex barrel for this cannon specificaly to do vortex rings and knock things over at a distance.

I now have a new project.. See how far away I can knock over pop cans in the driveway with a blast of air.
  • 0

Last edited by Technician1002 on Mon Sep 07, 2009 6:13 am, edited 2 times in total.
User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: Lentamentalisk » Mon Sep 07, 2009 12:58 am

I know that my 1/2"x6' cannon was able to throw 4 cans 20', when they were right in front of the barrel, but it definitely wouldn't knock anything over more than a few feet away.
  • 0

Do not look back, and grieve over the past, for it is gone;
Do not be troubled about the future, for it has not yet come;
Live life in the present, and make it so beautiful that it will be worth remembering.
User avatar
Lentamentalisk
Brigadier General
Brigadier General
 
Posts: 1202
Joined: Tue Aug 07, 2007 5:27 pm
Location: Berkeley C.A.
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Brian the brain » Mon Sep 07, 2009 4:55 am

You could add the principle of an airzooka to it.
An airzooka is basically a drum with a hole in one end and a flexible sheet on the other.Pull back the sheet and the air comes ot the hole in a circle, wich keeps spinning.
It forms a stable blast of air than can travel quite a distance.
A good ( and visible example of a homemade version is the first vid here:

http://www.youtube.com/watch?v=JYrH4g_a ... re=related

Some more:

http://www.youtube.com/watch?v=KH3lqTNHtZM

http://www.youtube.com/watch?v=Aja4JCV-m8Q

Combine this idea with a pneumatic cannon and it might be even better!
  • 0

Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
User avatar
Brian the brain
Moderator
Moderator
 
Posts: 3494
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Country: Netherlands (nl)
Reputation: 29

Unread postAuthor: Hotwired » Mon Sep 07, 2009 10:01 am

suburban spudgunner wrote:To throw a can from 20 feet (empty, I presume), you might want a somewhat large chamber, decent pressure (100+ psi), and a long, thin barrel to concentrate the pressure.


Concentrate the pressure on what? A very small point of the can?

If you have 100psi coming out of a 20mm valve port into a long 5mm barrel you don't increase the pressure but what you have done is decrease the force as the air blast is now a thin 5mm jet instead of the larger blast from the 20mm opening and thus transfers a lot less energy to the can.

If the cannon cannot fire a projectile then you do not want to use a barrel. You may want to use a nozzle of some kind to manipulate the blast but a barrel is for acceleration of a projectile and since you can't have it in the barrel... forget the barrel.

If this is to have repeatable results you may also want some kind of holder in front of the valve port/nozzle for the can, perhaps a trough made of half a pipe or something.
  • 0

User avatar
Hotwired
Lieutenant General
Lieutenant General
 
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Sep 07, 2009 10:04 am

Biggest chamber you can build, biggest fastest valve you can get your hands on or manufacture, and no barrel whatsoever.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: POLAND_SPUD » Mon Sep 07, 2009 10:24 am

obviously, he is looking for a vortex gun.. the only question is 'could it be operated pneumatically'? or in other words - does it really need a flexible sheet ??
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Unread postAuthor: jarm0591 » Mon Sep 07, 2009 10:34 am

Thanks for your answers.
I saw a video on youtube, do you think this is strong enough? or a pneumatic cannon is more powerful?
http://www.youtube.com/watch?v=kf4UW2H5 ... =rec-HM-r2
  • 0


jarm0591
Private
Private
 
Posts: 3
Joined: Sun Sep 06, 2009 11:25 pm
Reputation: 0

Unread postAuthor: Technician1002 » Mon Sep 07, 2009 10:52 am

jarm0591 wrote:Thanks for your answers.
I saw a video on youtube, do you think this is strong enough? or a pneumatic cannon is more powerful?
http://www.youtube.com/watch?v=kf4UW2H5 ... =rec-HM-r2


To answer that compare the impact of that one with the muzzle blast shown above. Those blow out candles. You want to toss cans.
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: dudeman508 » Mon Sep 07, 2009 11:56 am

I think he should incorperate the vortex into a pneumatic cannon. So he can use a vortex cannon with a monstrouse piston valved cannon replacing the sheet of strechy material in the back of the gun.
  • 0

User avatar
dudeman508
2nd Lieutenant
2nd Lieutenant
 
Posts: 237
Joined: Thu Jul 03, 2008 9:19 pm
Reputation: 0

Unread postAuthor: POLAND_SPUD » Mon Sep 07, 2009 2:36 pm

@dudeman508

yeah either that or fill rapidly the other side of the flexible sheet with a piston valve... it would be good to put some vent holes there and add rubber bands that would return it back to the original position after a few seconds... who said it can't be a semi :wink:



I've seen one that used acetone to achieve the same effect.. so maybe it's not the sheet but the hole cut at the muzzle of the gun.. (uhmm you know what I am talking about right??)
  • 0

Last edited by POLAND_SPUD on Mon Sep 07, 2009 3:08 pm, edited 1 time in total.
Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Next

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

cron
Reputation System ©'