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 68 users online :: 3 registered, 0 hidden and 65 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

My dual valve pneumatic-The Pimpinator

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

My dual valve pneumatic-The Pimpinator

Unread postAuthor: spudgunnerwryyyyy » Wed Aug 29, 2007 8:01 pm

This is my pneumatic and it has a 3" chamber 24" long. There are 2 3/4" sprinkler modified for pneumatic actuation by the blowgun. I have 2 barrels to use with gun. A 2.5" tennis ball barrel 48" long and a 1.5" barrel 48" long. I use these barrels on this gun and on my combustion. Damage pictures will come later.

EDIT: Posted damage pictures.
  • 0

Attachments
pneumatic.JPG
This is the chamber and valve assembly.
Either you love the paint job or you hate it.
barrels.JPG
2.5" and 1.5" Barrels both 48" long
08-30-07_1140.jpg
This was the backstop to catch flying bar-bells and d-cells.
08-30-07_1138.jpg
Entry hole into sheet rock. Shot with 5 pound bar-bell shown in backstop picture.
08-30-07_1139.jpg
Exit hole in sheet rock made by bar-bell.
Last edited by spudgunnerwryyyyy on Thu Aug 30, 2007 1:54 pm, edited 1 time in total.
User avatar
spudgunnerwryyyyy
1st Lieutenant
1st Lieutenant
 
Posts: 261
Joined: Thu Jul 12, 2007 10:54 pm
Reputation: 0

Unread postAuthor: Novacastrian » Wed Aug 29, 2007 8:29 pm

That looks like it could do some cool damage, nice gun although i'm leaning towards "hating" the paint job. In my opinion a camoflauge pattern would be the nuts. I also like that you use two valves.
I shall rate it a 8 out of 10- two points deducted for the wacky paintjob :D
  • 0


Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: thespeedycicada » Wed Aug 29, 2007 8:58 pm

sweet gun the paint job looks like a candy cane though :lol:
  • 0

User avatar
thespeedycicada
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 429
Joined: Sun Aug 12, 2007 1:28 am
Reputation: 0

Unread postAuthor: spudgunnerwryyyyy » Wed Aug 29, 2007 11:21 pm

Thanks guys this was easier than camouflage.
More comments please.
  • 0

User avatar
spudgunnerwryyyyy
1st Lieutenant
1st Lieutenant
 
Posts: 261
Joined: Thu Jul 12, 2007 10:54 pm
Reputation: 0

Unread postAuthor: Novacastrian » Thu Aug 30, 2007 2:04 am

Damage pics equals more comments :lol:
  • 0


Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: spudgunnerwryyyyy » Thu Aug 30, 2007 2:39 am

Ok im working on the damage. Im leaning towards shooting a bolt at wood.
  • 0

User avatar
spudgunnerwryyyyy
1st Lieutenant
1st Lieutenant
 
Posts: 261
Joined: Thu Jul 12, 2007 10:54 pm
Reputation: 0

Unread postAuthor: dongfang » Thu Aug 30, 2007 2:42 am

Hi,

You´ll need larger pipes to and from the valves.. My comment.

Nice otherwise..

Regards
Soren
  • 0

User avatar
dongfang
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 448
Joined: Sun Aug 27, 2006 8:02 am
Location: Switzerland
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: spud yeti » Thu Aug 30, 2007 10:23 am

looks like a cool cannon. Well done
  • 0

really good quote/phrase here
User avatar
spud yeti
Brigadier General
Brigadier General
 
Posts: 1030
Joined: Tue May 08, 2007 1:41 pm
Location: Cape town south africa
Reputation: 0

Unread postAuthor: spudgunnerwryyyyy » Thu Aug 30, 2007 12:31 pm

I realized i made a constrictive setup the second after the PVC cement set.
  • 0

User avatar
spudgunnerwryyyyy
1st Lieutenant
1st Lieutenant
 
Posts: 261
Joined: Thu Jul 12, 2007 10:54 pm
Reputation: 0

Unread postAuthor: joannaardway » Thu Aug 30, 2007 2:51 pm

I actually quite like the paint job... I see too many camo colour schemes, and not a lot of them are actually particularly good.

It's nice to see something different.
  • 0

Novacastrian: How about use whatever the heck you can get your hands on?
frankrede: Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid.
...I'm sorry, but that made my year.
User avatar
joannaardway
Brigadier General
Brigadier General
 
Posts: 949
Joined: Mon Oct 09, 2006 4:57 pm
Location: SW Hertfordshire, England, UK.
Reputation: 0

Unread postAuthor: jrrdw » Thu Aug 30, 2007 3:46 pm

Yea Joanna, i like it to. Nice launcher, 5 lbs, thats a nice chunck of metal to be sailing through the air, could you see it flying? Or is that a dumb question. Post some video's if you can.
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6538
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: spudgunnerwryyyyy » Thu Aug 30, 2007 3:55 pm

Well at a 45 degree angle it goes like 80' so i will get a video. Yah u can see it fly.
  • 0

User avatar
spudgunnerwryyyyy
1st Lieutenant
1st Lieutenant
 
Posts: 261
Joined: Thu Jul 12, 2007 10:54 pm
Reputation: 0

Unread postAuthor: joannaardway » Fri Aug 31, 2007 6:47 am

jrrdw wrote: could you see it flying? Or is that a dumb question.

Well, I find that things usually become hard to see at 100 m/s or more... but this is a lot larger than what I use, so you'd need to be going even faster.
So that would be 20,000J of kinetic energy or so to make it "invisible". At a decent 20% efficency, that becomes 100,000 J of chamber energy.

And that would need a 11 gallon chamber at 300 psi to provide that amount of energy. But for the actual chamber size, you'd need over 5000 psi and a 7 foot barrel. So, yes, it would be a little optimistic to get it so that it wasn't visible in flight.
  • 0

Novacastrian: How about use whatever the heck you can get your hands on?
frankrede: Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid.
...I'm sorry, but that made my year.
User avatar
joannaardway
Brigadier General
Brigadier General
 
Posts: 949
Joined: Mon Oct 09, 2006 4:57 pm
Location: SW Hertfordshire, England, UK.
Reputation: 0

Unread postAuthor: jrrdw » Fri Aug 31, 2007 6:52 pm

joannaardway wrote:
jrrdw wrote: could you see it flying? Or is that a dumb question.

Well, I find that things usually become hard to see at 100 m/s or more... but this is a lot larger than what I use, so you'd need to be going even faster.
So that would be 20,000J of kinetic energy or so to make it "invisible". At a decent 20% efficency, that becomes 100,000 J of chamber energy.

And that would need a 11 gallon chamber at 300 psi to provide that amount of energy. But for the actual chamber size, you'd need over 5000 psi and a 7 foot barrel. So, yes, it would be a little optimistic to get it so that it wasn't visible in flight.


Well, hehe, thats a lot of figuring there Joanna! So Spudgunner. Can you mod it to those specs or not?
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6538
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Unread postAuthor: blind909 » Fri Aug 31, 2007 10:16 pm

where do you atatch the barell, i realy dont get it.
  • 0

User avatar
blind909
Brigadier General
Brigadier General
 
Posts: 828
Joined: Thu Aug 02, 2007 6:06 pm
Location: Las Vegas, NV
Reputation: 1

Next

Return to Pneumatic Cannon Database

Who is online

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

Reputation System ©'