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 54 users online :: 5 registered, 0 hidden and 49 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

The annoying "keyhole" gun

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

The annoying "keyhole" gun

Unread postAuthor: Jakal444 » Fri Apr 21, 2006 4:07 pm

Nothing special or powerful just an idea I came up with to make use of some old PVC and fittings. Basically its a balloon powered BB laucher which requires no pump, no tyre valve and no PVC glue (the parts are held togheter by wrapping ptfe tape around the pipe and jamming it in the fitting).

You close the ball valve located next to the handle (in crude trigger position).
You remove the stopper from the back end of the gun (a pen in my case) and blow through the hole in the endcap. This causes a balloon to inflate at the bottom of the handle (it was previously crammed inside the handle). Once the balloon is big enough hold the end and put the stopper back in the mouthpiece. Now its locked and loaded, put a BB down the barrel (Mc Donalds drinking straw) and open the ball valve to fire.

By opening and closing the ball valve quickly I get about 10 shots from one fill , but I have to load a BB for each shot (have no clue how to make a hopper for a straw).

Its called the annoying keyhole gun because I first used it to covertly fire small spitballs at a friend through a keyhole. It took him 5 shots to actually realize what I was doing.

This thing can be fired and refilled relatively quickly. A handful of people armed with them could have a laugh I suppose, like a mini paintball game.
Now if only I could make some sort of hopper....

So there you have it, the lazy-man's peashooter ..enjoy.
  • 0

Attachments
Pic(78).jpg
The whole gun with the balloon deflated.
To the left the barrel, to the right the pen I used as a stopper. You can use the straw for size comparism.
Pic(79).jpg
Balloon inside handle.
Pic(80).jpg
Barrel i.e. straw
Pic(80).jpg (14.22 KiB) Viewed 2939 times
Pic(81).jpg
Stopper i.e. pen
Pic(81).jpg (15.42 KiB) Viewed 2939 times
Pic(82).jpg
The gun ready to fire.
Pic(82).jpg (17.09 KiB) Viewed 2939 times
User avatar
Jakal444
Staff Sergeant
Staff Sergeant
 
Posts: 111
Joined: Sun Jan 29, 2006 1:12 pm
Reputation: 0

Unread postAuthor: Ballad_Black » Fri Apr 21, 2006 4:20 pm

Lol. I love it. But im guessing it doesnt have a lot of power behind each shot?

For more powerful shots, try thelong baloons that make baloon animals from, those things hard hard as hell to blow up unless you have a pump. Though im not sure it will give the same proformance after you re-inflate it. Eh.
  • 0

There is no civility, only politics.
Greed can be a very powerful ally.
User avatar
Ballad_Black
Master Sergeant
Master Sergeant
 
Posts: 159
Joined: Sat Oct 15, 2005 10:38 am
Reputation: 0

Unread postAuthor: schmanman » Fri Apr 21, 2006 6:03 pm

use those thick,rubber ballons that are attached to rubber bands,you know,the kind you used to get as party favors when you were little
  • 0

User avatar
schmanman
Major General
Major General
 
Posts: 1685
Joined: Sat Mar 25, 2006 12:28 pm
Location: Michigan,U.S.A
Country: United States (us)
Reputation: 0

Unread postAuthor: Atlantis » Fri Apr 21, 2006 7:18 pm

For a hopper just take another McDonalds straw and attach it to a hole in the barrel. This will function as a clip. You can try melting the 2 straws together just don't melt it to much.
  • 0

"There isn't a problem in the world that can't be solved by the proper application of explosives"
User avatar
Atlantis
Brigadier General
Brigadier General
 
Posts: 955
Joined: Sat Sep 03, 2005 10:26 pm
Location: Florida
Reputation: 0

Unread postAuthor: Benny » Fri Apr 21, 2006 10:44 pm

cool idea, i thought of using a balloon before but i never tryed it because i didnt think it wold have much power.
  • 0


Benny
Brigadier General
Brigadier General
 
Posts: 844
Joined: Wed Apr 19, 2006 8:21 pm
Location: Tasmania, Australia.
Reputation: 0

Unread postAuthor: Rambo » Fri Apr 21, 2006 11:22 pm

I will tell you how to make extremely powerfull gun comperad to this.You take half inch tube.Put the spud slug in and blow with your mouth.The presure will be much bigger compered to this in the balloon.
  • 0

User avatar
Rambo
Colonel
Colonel
 
Posts: 509
Joined: Sun Jan 15, 2006 2:07 pm
Reputation: 0

Unread postAuthor: )DEMON( » Sat Apr 22, 2006 2:12 am

hehe,seems like something to annoy your office buddies.
  • 0

Forever dreaming...
User avatar
)DEMON(
Major General
Major General
 
Posts: 1391
Joined: Sun Mar 12, 2006 1:22 pm
Location: Johannesburg South Africa
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: SpudStuff » Sat Apr 22, 2006 2:19 am

I will tell you how to make extremely powerfull gun comperad to this.You take half inch tube.Put the spud slug in and blow with your mouth.The presure will be much bigger compered to this in the balloon.
\
is that supposto be a joke? it is true though
  • 0

User avatar
SpudStuff
Major General
Major General
 
Posts: 1410
Joined: Sat Dec 10, 2005 3:55 pm
Location: Cupertino, California
Reputation: 1

Unread postAuthor: Rambo » Sat Apr 22, 2006 5:24 am

Where I live there is a game caled фуниики(funnels).A group of cildren each one 'armed' with а tube(калам) and about 100 paper funnels go in old construction site and shoot each other.I dicided to make a superior weapon(a sniper) and that's how I reenvented the spud gun.
  • 0

User avatar
Rambo
Colonel
Colonel
 
Posts: 509
Joined: Sun Jan 15, 2006 2:07 pm
Reputation: 0

Unread postAuthor: FiveseveN » Sat Apr 22, 2006 6:53 am

Hehe, yeah, we have that same game over here. Such a crude weapon is actually quite powerful, as an average kid can shoot the funnel to about 40 yards, tho' CQB tactics at around 20 yards are more common. I've seen some pretty nice designs, too. Double, triple, quadruple shooters, magazines, snipers, MP5s etc. Kids can be quite inventive. Man, if I knew back then what I know now... :lol:
  • 0

User avatar
FiveseveN
Captain
Captain
 
Posts: 337
Joined: Fri Oct 14, 2005 5:48 am
Location: Nowhere
Reputation: 0

Unread postAuthor: Jakal444 » Sun Apr 23, 2006 12:54 pm

Well obviously its power is limited but different balloons cause different pressures. After a few shots the balloon gains a permanent extension but its cheap and easy to replace. And trying to stick two straws togheter is very hard to do but I have another idea for the hopper its a sort of pump action design in which another straw will sit on top of the barrel lengthwise and by pushing BBs through the open end the BBs will fall into the barrel/
  • 0

User avatar
Jakal444
Staff Sergeant
Staff Sergeant
 
Posts: 111
Joined: Sun Jan 29, 2006 1:12 pm
Reputation: 0

Unread postAuthor: Rambo » Sun Apr 23, 2006 1:02 pm

Oh come on.Pump action?I can tell you from where to take and exteremaly powerful gun comperad to this.You get out of your house and go in the first toy shop.There are super strong spring operated airsoft guns.All of them bolt action(incredible huh?).That's it for now.When you become 40 I'll tell how to make a higher class weapon-an incredible pellet gun :lol:
  • 0

User avatar
Rambo
Colonel
Colonel
 
Posts: 509
Joined: Sun Jan 15, 2006 2:07 pm
Reputation: 0

Unread postAuthor: )DEMON( » Mon Apr 24, 2006 1:31 pm

i thought you wernt allowed to have pellet guns,anyway why dont you tell us now?
  • 0

Forever dreaming...
User avatar
)DEMON(
Major General
Major General
 
Posts: 1391
Joined: Sun Mar 12, 2006 1:22 pm
Location: Johannesburg South Africa
Reputation: 0

Unread postAuthor: Rambo » Mon Apr 24, 2006 2:10 pm

Why do you think so?By what law some one will be not allowed to have a pellet gun?
  • 0

User avatar
Rambo
Colonel
Colonel
 
Posts: 509
Joined: Sun Jan 15, 2006 2:07 pm
Reputation: 0

Unread postAuthor: Jakal444 » Tue Apr 25, 2006 8:58 am

I have two airsoft guns both pistols, but a couple of my friends have full auto M4s. Over here you are allowed to own and use them, however getting them into the country is the hard part due to certain import regulations.

As a matter of fact, I got into spudgunning to build my own airsoft weapon, a rifle with the ability to switch between full-auto and a bolt action single shot. I could very easily buy one, but I would rather make one simply to know that I can.

And when I said "pump-action", I didnt mean anything complex just a small cheap and easy way to reload BB s into a barrel with a shotgun style tubular magazine.
  • 0

User avatar
Jakal444
Staff Sergeant
Staff Sergeant
 
Posts: 111
Joined: Sun Jan 29, 2006 1:12 pm
Reputation: 0

Next

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'