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 47 users online :: 4 registered, 0 hidden and 43 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

Spear Gun

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

Spear Gun

Unread postAuthor: Weasel » Mon Nov 21, 2005 7:38 pm

does anybody know how i could make a spear gun that will actualy shoot under water? i made one that shoots out of water quite well thats kinda just like a regualy combustion spudgun but im at a loss when it comes to building one that will actualy fire under water and work well. does anybody have any ideas?
  • 0

Image
User avatar
Weasel
Private
Private
 
Posts: 24
Joined: Sat Sep 03, 2005 10:35 pm
Reputation: 0

Unread postAuthor: TalonXxX » Mon Nov 21, 2005 8:22 pm

it would have to be a pneumatic for sure :P
you would need to have a magazine with as many shots as you want to do underwater because you would have to fill magazine above water... you couldn't reload the gun underwater... also, the ammo would have to form a pretty tight seal in the barrel...
  • 0

User avatar
TalonXxX
Master Sergeant
Master Sergeant
 
Posts: 168
Joined: Sun Oct 16, 2005 3:22 pm
Location: Canada
Reputation: 0

Unread postAuthor: Weasel » Mon Nov 21, 2005 8:51 pm

i already got the tight seal down. poured expanding foam down the barrel after i put the spear in so the ammo is air tight, i only need it to shoot once but i dont know how to set up the pneumatic stuff. iv kinda only done this stuff with combustion and i dont really have much money to spend on it.
  • 0

Image
User avatar
Weasel
Private
Private
 
Posts: 24
Joined: Sat Sep 03, 2005 10:35 pm
Reputation: 0

Unread postAuthor: boilingleadbath » Tue Nov 22, 2005 5:00 pm

"it has to be really well sealing"
No it doesn't. You'll get bubbles anyway, and the couple feet/sec arn't worth much extra effort.

The issue I see is that your barrel will fill up with water, and adding large amounts of mass to be launched... but seeing as you say you only need 1 shot, it shouldn't be too hard to put a aluminum foil burst disk on the end of your barrel (in a union, of course)
It would be <i>possible</i> to re-load a shot underwater, but it would probably be fairly difficult. Or, you could make interchangable barrels with a union on each end... might have trouble with the line, though.
  • 0

User avatar
boilingleadbath
Moderator
Moderator
 
Posts: 1642
Joined: Sat Mar 12, 2005 10:35 pm
Location: Pennsylvania, USA
Reputation: 0

Unread postAuthor: Weasel » Tue Nov 22, 2005 8:15 pm

the barrel dosent fill up with water i have the foam filled all the way up and down and narrowed to a point at the end. the foam is really thick, it would be hard for water to get past it unless the thing was under water for a long time like 2 days. i just need to know how exactly i would set up the air tank to shoot it. i took my combustion test one and put the barrel down under water at a lake and shot it and it went really well but i know i wont be able to use combustion under water. i wish i hadent packed my camera up for my move or i would show you pictures of what iv got going on. my only problem is i need it to be air powered and the system needs to be set up so it will work in water. everything else i got covered
  • 0

Image
User avatar
Weasel
Private
Private
 
Posts: 24
Joined: Sat Sep 03, 2005 10:35 pm
Reputation: 0

Unread postAuthor: TalonXxX » Tue Nov 22, 2005 9:19 pm

do a CO2 cartridge powered set-up with a relatively small chamber... that way you could use a very portable and non-bulky air solution and still get enough psi to launch it a good distance. 3" PVC at about 5.5" gets 100 psi with a 12g CO2 cartridge, just a thought... not sure exactly what you are looking for? how to build a pneumatic? plans for one? ideas? not too sure...
  • 0

User avatar
TalonXxX
Master Sergeant
Master Sergeant
 
Posts: 168
Joined: Sun Oct 16, 2005 3:22 pm
Location: Canada
Reputation: 0

Unread postAuthor: deathtodeer666 » Wed Nov 23, 2005 12:44 am

okay, okay the pnematic would work kinda good but if you wanted a good spear gun I would use a exposed spear on a rod with surgical tubing and a handle with catch, thats the way I would go.
  • 0

User avatar
deathtodeer666
Staff Sergeant
Staff Sergeant
 
Posts: 126
Joined: Sat Sep 03, 2005 12:57 am
Location: mars alabama
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: Cronic » Wed Nov 23, 2005 4:01 am

Ok you wouldn't be able to do that because it's just too weak to shoot under water. And even if you do it wouldn't be that good compared to other underwater guns that work on the principle of a piece of rubber shooting them out at high velocity. Not trying to be a party pooper so good luck with your project :D
  • 0

<img src="http://i4.photobucket.com/albums/y107/LabMinky/labb.jpg" alt="Image hosted by Photobucket.com">
User avatar
Cronic
Sergeant
Sergeant
 
Posts: 92
Joined: Mon Oct 24, 2005 2:19 pm
Reputation: 0

Unread postAuthor: pyromanic13 » Thu Dec 01, 2005 12:18 am

ya definently go with just a sling shot style
  • 0


pyromanic13
Brigadier General
Brigadier General
 
Posts: 913
Joined: Wed Oct 19, 2005 7:54 pm
Reputation: 0

Return to General Spud Cannon Related

Who is online

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

Reputation System ©'