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 55 users online :: 4 registered, 0 hidden and 51 guests


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

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

Like a B.O.S.S.

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

Unread postAuthor: mobile chernobyl » Fri Jul 03, 2009 1:44 pm

at what PSI are you getting these values? I will post up some damage pics in like a half hour after I'm done shooting - I need some better penetrating dart ideas if anyone has them, because my sabot'd household dart's dont fly straight lol...

OK Picture time:

First the two sabot'd darts:

Image
Image

Next the overall damage after a few lead balls (none penetrated) and the first dart (penetrated... somewhat sideways?!?)
Image
Now after the second dart, and this was supposed to see if it could go through two sheets of 1/8" aluminum (Yes... a mighty ambitious 1/4" of aluminum!)
Image
Image
Image

It almost seems as if the dart broke in half almost in air?? then two parts of it penetrated the first sheet rather easily, certainly if it flew straight and hit tip first I'd imagine it would have made it through both sheets...


So after some preliminary tests - I have found that I'm still dead in the water with a good penetrating dart. I think however - with one, I could prolly shoot through two of the 1/8" sheet aluminum pieces I have.

Marbles and sabot'd lead balls however shoot pretty consistantly - I had a nice 5"X5" grouping at about 40 yards with my ball valve trigger and the new scope (Which I sighted in). I am thinking a QEV might be the next purchase for consistancy's sake, what size would go well with this gun?
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Unread postAuthor: mobile chernobyl » Tue Jul 07, 2009 8:47 pm

::UPDATE!!!::

I HAS QEV PWR NOWZ

damn!! what an f'ing difference, I'm definitely buying another for my other copper sniper.

3/8" QEV + new small parts = $35 upgrade well worth it!! the power increase is amazing.

I'll hafta get some new damage pics now that the gun can perform, and perform consistently.

Image
Image
Image

Now I have a blow gun triggering it, and it's very ergonomically accessible compared to the 3/8" ball valve! one finger slight squeeze activation compared to whole hand flinging equals almost no jerking on the gun when firing, so more consistent shots should def be possible. Not to mention the obvious difference in shooting tones, now it's an almost deafening CRACK compared to the fast Whoosh of before... I think it's safe to say there will be a slight increase in power.
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Unread postAuthor: spudtyrrant » Tue Jul 07, 2009 9:09 pm

mobile chernobyl wrote:at what psi are you getting these values
200psi nice dart btw well for a second at least
edit:omg i didn't even look at the scope and qev mod sweet now you know everyone is going to be oogling for damage shots so hurry the F*** up jk
  • 0

Last edited by spudtyrrant on Tue Jul 07, 2009 9:14 pm, edited 1 time in total.
I ♥ ♣'in baby seals
User avatar
spudtyrrant
Colonel
Colonel
 
Posts: 550
Joined: Fri Jan 02, 2009 6:10 pm
Reputation: 0

Unread postAuthor: mobile chernobyl » Tue Jul 07, 2009 9:13 pm

I'm at 300psi now ;) I've downloaded GGDT and HGDT and our "answers" differ slightly because alot of the info it requires I never even gave you lol.

I am not getting better results per say, just different results.

needless to say... I'm thinking of making a bigger metal gun someday...
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Unread postAuthor: spudtyrrant » Tue Jul 07, 2009 9:16 pm

mobile chernobyl wrote:I'm at 300psi now ;) I've downloaded GGDT and HGDT and our "answers" differ slightly because alot of the info it requires I never even gave you lol.

I am not getting better results per say, just different results.

needless to say... I'm thinking of making a bigger metal gun someday...

i just put in what seemed right by looking at your gun i didn't know how good your piston was so i put a 65% valve coefficient that might be the problem
  • 0

I ♥ ♣'in baby seals
User avatar
spudtyrrant
Colonel
Colonel
 
Posts: 550
Joined: Fri Jan 02, 2009 6:10 pm
Reputation: 0

Unread postAuthor: mobile chernobyl » Tue Jul 07, 2009 9:18 pm

spudtyrrant wrote:i just put in what seemed right by looking at your gun i didn't know how good your piston was so i put a 65% valve coefficient that might be the problem


Yea I only put 50% cause of the QEV, I haven't run any quantitative tests to calculate the actual Cv, so I'm just sticking with a modest number for now lol. All of the results are expectantly lower, but not by much because alot of the other criteria actually helped me.
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Re: Like a B.O.S.S.

Unread postAuthor: lockmanslammin » Sun Oct 05, 2014 10:01 am

Totally digging up an old post here but I couldn't help it...

Great minds think alike?

pneumatic-cannons/topic13286.html
  • 0

User avatar
lockmanslammin
Master Sergeant
Master Sergeant
 
Posts: 152
Joined: Sun Feb 10, 2008 3:22 pm
Location: Sioux Falls, South Dakota
Reputation: 0

Re: Like a B.O.S.S.

Sponsored

Sponsor
 


Re: Like a B.O.S.S.

Unread postAuthor: mobile chernobyl » Sun Oct 05, 2014 7:14 pm

Whoa! I can't believe I never noticed yours, especially only being a year ahead of mine! I always liked that design, I made a few PVC variants (ended up being 7 feet long, but fun and ergonomic!) and two copper variants. Simple, ergonomic and sweet looking layout in my opinion!
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Re: Like a B.O.S.S.

Unread postAuthor: lockmanslammin » Sun Oct 05, 2014 8:55 pm

I went with it for maybe 1/3rd looks and 2/3 function. I was thinking of possibly making some sort of a sliding breech loading barrel, so I needed that support up front, and I liked that location of the gauge so it would double as a cheek rest for the scope.

I feel my chamber volume is to big though. If I were to do it again I would plug the chamber in front of the hand grip.

I stumbled on yours while doing a search for something else and was suprised at how similar the two were.

I never actually got it loaded into the cannon database, so I'm not suprised you didn't see it.

Nice gun btw.

Chris
  • 0

User avatar
lockmanslammin
Master Sergeant
Master Sergeant
 
Posts: 152
Joined: Sun Feb 10, 2008 3:22 pm
Location: Sioux Falls, South Dakota
Reputation: 0

Re: Like a B.O.S.S.

Unread postAuthor: mark.f » Mon Oct 06, 2014 6:57 am

It's actually a really great design... if I could go back and rebuild Thorondor with this layout I would... saves the trouble of installing some sort of rigged-up stock (mine was actually pretty solid, but still...).

Good work to the both of you. :D
  • 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

Re: Like a B.O.S.S.

Unread postAuthor: Ianbuckwell » Sat Oct 11, 2014 12:28 pm

Mobile Chernobyl - where did you get the red scope.mount/railyou had originally fitted? or was it from the Ion gun you had? Thanks
  • 0


Ianbuckwell
Master Sergeant
Master Sergeant
 
Posts: 157
Joined: Tue Apr 01, 2014 1:13 pm
Country: Antarctica (aq)
Reputation: 1

Re: Like a B.O.S.S.

Unread postAuthor: mobile chernobyl » Sat Oct 11, 2014 11:28 pm

It was off of a blowback stacked tube paintball gun - probably a spider or something similar... You should be able to find them on eBay for really cheap - search for dove tail sight rail
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Previous

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'