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 39 users online :: 4 registered, 0 hidden and 35 guests


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

Registered users: Bing [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

HPHH (High Pressure HandHeld)

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

HPHH (High Pressure HandHeld)

Unread postAuthor: DYI » Sun Oct 07, 2007 8:08 pm

On Saturday I tried my last idea to get my burst disk cannon to seal properly without spending large sums of money. This idea failed. Consequently, you won't be seeing the Uber-powerful burst disk gun until January at the earliest.

This setback reduced me to only a single operational launcher, my first spray'n'pray combustion, which isn't really that satisfying to shoot. I wanted a launcher that was both fun and easy to shoot, as well as being handheld and having fast reload times. I also wanted to use the nitrogen tank that costs me $56/year for something other than decoration.

I came up with this design, and put it all together on Saturday afternoon.

Specs: Chamber: ~51 inches of 1.25" steel pipe (actual ID is 1.38")
Barrels: 1.5"x 4'
1.5"x 12'
Barrel material: ABS (what else?)
Firing Valve: 1.5" brass ball valve, rated for 600 psi
Fill valve: hydraulic quick connects, rated for 3000 psi (!)
Pressure source: type 16 industrial nitrogen tank
Operating pressure range: 150-500 psi

So far, I've only pressurised it to 400 psi, at which point it soon developed a leak. There are two clips on the video of it firing at 400. The 12' long barrel greatly increases performance, but severely cripples ease of use.

As far as range goes, after 150 psi you can't see the potato at all. Estimated range at 150psi is about 150 yards, if not more. This is with the short barrel.

[youtube]http://www.youtube.com/watch?v=raRSwv_dGvE[/youtube]
  • 0

Attachments
nitrogen setup resized.jpg
This is my filling setup. Nitrogen tank with 50-500 psi regulator.
HPHH2 resized.jpg
The valve. Nothing new here.
HPHH1 resized.jpg
The whole gun, with the 4' barrel attached. The vertical part is a handle, and the fill valve is at the top of the handle.
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Unread postAuthor: Redcoat » Sun Oct 07, 2007 8:26 pm

Nice Gun!

Though, the barrel seems like it needs more support.
Is the Filling tank one of those tanks that ou have to take back to the shop and they swap you one?
Happy Spuddin'
  • 0

Poo.
User avatar
Redcoat
Brigadier General
Brigadier General
 
Posts: 836
Joined: Tue Feb 13, 2007 1:07 am
Location: Sydney ,Australia
Reputation: 0

Unread postAuthor: DYI » Sun Oct 07, 2007 8:35 pm

The barrel just looks like that because of the angle of the picture. The filling tank is one of those ones that you take back to the outlet, where they send it away and hope to get it back in about a week, and then charge you $20 more than they said they would.
  • 0

Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Unread postAuthor: LikimysCrotchus5 » Sun Oct 07, 2007 8:53 pm

Are you still trying to make that cannon that you want to create a sonicboom with (surpass the speed of sound). Cause that is something i was looking forward to. But nice gun for now, just need to change that brass ball valve with anything better :D
  • 0

User avatar
LikimysCrotchus5
Brigadier General
Brigadier General
 
Posts: 1100
Joined: Tue Sep 04, 2007 10:16 pm
Reputation: 0

Unread postAuthor: iPaintball » Sun Oct 07, 2007 8:54 pm

Sweet cannon man! Are you renting the tank?
  • 0

Summer Projects:
CO2 tank hybrid: Gotta fix the meter :(
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
User avatar
iPaintball
Colonel
Colonel
 
Posts: 695
Joined: Sun Mar 04, 2007 8:37 pm
Reputation: 0

Unread postAuthor: Killjoy » Mon Oct 08, 2007 2:41 am

Damn nice looking cannon. Simple, and with the ability to shoot a potato and bludgen someone. I love it.
How much does it weigh?
  • 0

Stanford Class of 2012

"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill

Killjoy
Brigadier General
Brigadier General
 
Posts: 1053
Joined: Sun Nov 12, 2006 12:51 am
Location: New Mexico
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Oct 08, 2007 2:59 am

What's the chances of making a spring-loaded mechanism like this one?

Also, I have to comment about your backstop - since ball valve guns are notoriously unweildy and difficult to aim, why are you shooting with a window in the background?
  • 0

Attachments
easymistaketomake.jpg
easymistaketomake.jpg (23.12 KiB) Viewed 2137 times
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

Sponsored

Sponsor
 


Unread postAuthor: mark.f » Mon Oct 08, 2007 5:42 am

I was about to say the same thing as Jack, (blasted!), you should rig up a spring loaded mechanism to open that valve. It doesn't have to be fancy. I made a prototype with a door spring and some vice grips to hold the valve handle in place and let it go.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: DYI » Mon Oct 08, 2007 9:16 am

I'll probably try to make a spring loaded mechanism for it this week. Does anyone know what kind of opening times a spring loaded ball valve can get?

I'm just about to pressure test it and find where the leak is, and then fix it. After that, I'll try to get a video of it at 500 psi with the 12' barrel attached.
  • 0

Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
User avatar
DYI
Lieutenant General
Lieutenant General
 
Posts: 2861
Joined: Sat Jul 07, 2007 8:18 pm
Location: The People's Republic of Canuckistan
Country: Turks and Caicos Islands (tc)
Reputation: 9

Unread postAuthor: jackssmirkingrevenge » Mon Oct 08, 2007 9:22 am

I'll probably try to make a spring loaded mechanism for it this week. Does anyone know what kind of opening times a spring loaded ball valve can get?


It's hard to say, it depends on the strength of your string, how much you intend to stretch it, how much leverage it has, ball valve friction etc.
  • 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

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'