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 76 users online :: 5 registered, 0 hidden and 71 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Thoughts on my first cannon?

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 

Should I finish my gun?

No, trash it. It wont work PERIOD.
0
No votes
Go ahead, it's fine.
6
55%
You can, but it's going to be terrible.
5
45%
 
Total votes : 11
  • Author
    Message

Thoughts on my first cannon?

Unread postAuthor: HaiThar » Thu Sep 20, 2007 7:01 pm

Well, I'm on the finishing stages of my cannon... Just need to prime + cement the last pieces , and wire up my solenoid. I do NOT intend on modifying my sprinkler valve, unless it doesnt work... I'm posting here before I put on the finishing touches, because after you cement and it doesnt work...You're stuck with a useless pile of PVC pipe.... so PLEASE any suggestions or changes you would make, please post. I will be wiring the solenoid up to 3 9v batteries. It will have a safety(a flipswitch) and a trigger(momentary switch).
Image
Image

Above is my ghetto replacement for a woodblock + sprinkler binder thing...

Image
  • 0

User avatar
HaiThar
Donating Member
Donating Member
 
Posts: 227
Joined: Fri Sep 14, 2007 12:12 am
Reputation: 0

Unread postAuthor: Mr.Russ » Thu Sep 20, 2007 7:07 pm

it should work, but is your stock bloked off from the chamber> if not thats restricting flow, heaps.
  • 0

Image
Music is like candy. you throw out the (w)rappers
User avatar
Mr.Russ
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 429
Joined: Fri Jan 26, 2007 9:07 pm
Reputation: 0

Unread postAuthor: DYI » Thu Sep 20, 2007 7:16 pm

The sprinkler valve restricts the flow far more than the stock does, so there shouldn't be any real problem, on way or the other.
  • 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: Killjoy » Thu Sep 20, 2007 8:09 pm

Looks pretty good, I would change the stock though in my personal opinion, looks a little funky. Maybe shorten the angled bits so the caps are flushed with the 45 elbows, or just ditch the elbows and have the stock just be staight. Other then that, looks cool.
  • 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: mopherman » Thu Sep 20, 2007 8:13 pm

looks dificult to aim with it being so long and front-heavy. i would ditch the stock.
looks good though
  • 0

searching for a modern day savior from another place,inclined toward charity,everyone's begging for an answer,without regard to validity,the searching never ends,it goes on and on for eternity
-Bad religion
User avatar
mopherman
Brigadier General
Brigadier General
 
Posts: 788
Joined: Sat Feb 03, 2007 8:20 pm
Reputation: 0

Unread postAuthor: windshrike » Thu Sep 20, 2007 8:17 pm

mopherman wrote:looks dificult to aim with it being so long and front-heavy. i would ditch the stock.
looks good though


Same here. You would need VERY long arms to aim properly with that thing the way it is set up at the moment.

Also, with such a large chamber and so much barrel constriction, a I'd recommend a good-sized barrel, at least 6' long.
  • 0

User avatar
windshrike
Sergeant Major
Sergeant Major
 
Posts: 178
Joined: Thu Jun 28, 2007 4:23 pm
Reputation: 0

Unread postAuthor: frankrede » Thu Sep 20, 2007 8:49 pm

nasty! lol
I see DWV!
Enough Zip ties?and how do you plan on firing it?

You asked for thoughts, I answered.
  • 0

Current project: Afghanistan deployment
User avatar
frankrede
Lieutenant General
Lieutenant General
 
Posts: 3220
Joined: Thu Jul 20, 2006 9:47 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: noname » Thu Sep 20, 2007 9:01 pm

Yep, the coupler. Clip those zipties after you get rid of the DWV coupler.
  • 0

User avatar
noname
Lieutenant General
Lieutenant General
 
Posts: 2699
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA
Country: United States (us)
Reputation: 9

Unread postAuthor: HaiThar » Thu Sep 20, 2007 10:02 pm

DMV...where? :shock:

Would that be the nipple I'm using?
  • 0

User avatar
HaiThar
Donating Member
Donating Member
 
Posts: 227
Joined: Fri Sep 14, 2007 12:12 am
Reputation: 0

Unread postAuthor: noname » Thu Sep 20, 2007 10:05 pm

I already said, the coupler. Either it's DWV or you cemented the bushing in less than halfway.
  • 0

User avatar
noname
Lieutenant General
Lieutenant General
 
Posts: 2699
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA
Country: United States (us)
Reputation: 9

Unread postAuthor: frankrede » Thu Sep 20, 2007 10:05 pm

HaiThar wrote:DMV...where? :shock:

Would that be the nipple I'm using?
He said coupler.
And the DMV is where I go for my driver license, do they do cannons too?
/sarcasm
  • 0

Current project: Afghanistan deployment
User avatar
frankrede
Lieutenant General
Lieutenant General
 
Posts: 3220
Joined: Thu Jul 20, 2006 9:47 pm
Reputation: 0

Unread postAuthor: Killjoy » Fri Sep 21, 2007 12:26 am

Yeah man course they do, why does it seem like everyone is surprised about it?

And the coupler they be-a-talking about is the piece of pipe connecting your pressure chamber to the 2" to 1" bushing which connects to the 1" pipe that meanders around to your valve.
  • 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: CannonCreator » Fri Sep 21, 2007 12:33 am

dude later when its working and everthing, replace the zip ties with 2 or 3 metal clamps there SUPER strong and look cool. And ya it should owrk fine it will have to cycle out somewere.
  • 0

Spudding Is dangerous, I learned the hard way:
http://www.spudfiles.com/forums/my-eye- ... 15301.html

Guns. As They may Claim lives, they are lives. Our lives.

When Life gives you lemons, through them at somone.

Live, Breathe, Eat, Paintball
User avatar
CannonCreator
Captain
Captain
 
Posts: 314
Joined: Sun Aug 12, 2007 12:59 pm
Location: Moorpark, CA
Reputation: 0

Unread postAuthor: HaiThar » Fri Sep 21, 2007 8:26 am

About the coupler... I will have to look at it to see if it is DMV, but it is cemented all the way in....I'm at school atm, so when I get home, I will look. So I should remove the stock, wireties, and get a new fitting?
  • 0

User avatar
HaiThar
Donating Member
Donating Member
 
Posts: 227
Joined: Fri Sep 14, 2007 12:12 am
Reputation: 0

Unread postAuthor: Hubb » Fri Sep 21, 2007 8:53 am

The stock doesn't have to be removed, but you should make it smaller. A good length of pull, or length from the butt to the trigger, is 13 inches. Try to shoot for that length or somewhere near it.

Looking over your stock again, if you've never used a sprinkler valve, eventually you probably will mod it (as guys have a tendancy to generate as much power as possible). If that it is the case, your stock may have trouble around the elbows (i.e. it may break). This can easily be fixed by removing the elbows and placing the stock inline with the barrel.

As far as the gun being front heavy (if it is) you could always fill the stock with cement or something. This will even the weight out and block of air to the stock which may restrict the flow.

Okay, enough about the stock: That coupler is DWV. Just trim it off and replace it with another (pressure rated) one. As far as the wireties go, they are fine, as long as you clip them. Trim the cloth, paint the beast, and go break sh!t. :)
  • 0

User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Next

Return to Pneumatic Cannon Discussion

Who is online

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

Reputation System ©'