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 64 users online :: 6 registered, 0 hidden and 58 guests


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

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

20mm Airgun MkII

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

20mm Airgun MkII

Unread postAuthor: HunterT » Sun Nov 07, 2010 8:56 pm

When building my first airgun/cannon I used DWV piping without knowing that it shouldn't be used for airguns. So I took apart that airgun and built this one. I've reused the breech, barrel, and sprinkler valve from my first version. It now has a bigger, pressure rated PVC chamber. I built it to resemble the Lahti L-39 anti tank rifle, however mine will not be taking on Russian tanks. I still want to add a magazine on the top and a few other things.

I've used it up to 60 psi at the max and I usually use it at ~40psi. I've shot it at empty milk jugs filled with water and the water goes flying.
  • 0

Attachments
untitled.JPG
The gun
DSCF0008.JPG
Hole in a slab of ice/snow
DSCF0004.JPG
Looking down it
DSCF22.JPG
The breech
User avatar
HunterT
Staff Sergeant
Staff Sergeant
 
Posts: 113
Joined: Wed Jul 07, 2010 9:46 pm
Location: Just east of Russia
Reputation: 0

Unread postAuthor: JDP12 » Sun Nov 07, 2010 9:50 pm

looks good, but i would advise not using PVC in cold conditions, since it can become bitter and fragment explosively, which could lead to serious injury
  • 0

User avatar
JDP12
Major General
Major General
 
Posts: 1943
Joined: Fri Mar 30, 2007 8:34 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Sun Nov 07, 2010 10:46 pm

JDP12 wrote:i would advise not using PVC in cold conditions, since it can become bitter


Indeed, PVC is notoriously spiteful at lower temperatures :roll: :D

(itouch I assume :D)

As to the subject of this thread, it would benefit from modding the sprinkler valve, especially as you have a relatively small chamber running at relatively low pressure, but not bad for a second effort :)
  • 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

Unread postAuthor: JDP12 » Sun Nov 07, 2010 11:44 pm

yea good old itouch.... and some retardedness on my part.
  • 0

User avatar
JDP12
Major General
Major General
 
Posts: 1943
Joined: Fri Mar 30, 2007 8:34 pm
Reputation: 0

Unread postAuthor: HunterT » Mon Nov 08, 2010 12:04 am

JDP12 wrote:...i would advise not using PVC in cold conditions, since it can become bitter and fragment explosively, which could lead to serious injury


Is this a danger if I'm only outside with it for five minutes? The rest of the time I store it inside my house.

jackssmirkingrevenge wrote:...it would benefit from modding the sprinkler valve...


I tried to order a blowgun trigger from amazon.com, but they don't deliver compressed air equipment to Alaska. I have the tubing and such. Tomorrow I'm going to look for one at our local auto parts store.

-HunterT
  • 0

User avatar
HunterT
Staff Sergeant
Staff Sergeant
 
Posts: 113
Joined: Wed Jul 07, 2010 9:46 pm
Location: Just east of Russia
Reputation: 0

Unread postAuthor: JDP12 » Mon Nov 08, 2010 12:10 am

yea then its okay probably. You don't want the temperature of the PVC to drop significantly, which would happen if you leave it outside for extended periods. Stepping out of your house to shoot is a little safer.
  • 0

User avatar
JDP12
Major General
Major General
 
Posts: 1943
Joined: Fri Mar 30, 2007 8:34 pm
Reputation: 0

Unread postAuthor: HunterT » Mon Nov 08, 2010 12:14 am

JDP12 wrote:Stepping out of your house to shoot is a little safer.


That was my logic. Thanks.
  • 0

User avatar
HunterT
Staff Sergeant
Staff Sergeant
 
Posts: 113
Joined: Wed Jul 07, 2010 9:46 pm
Location: Just east of Russia
Reputation: 0

Sponsored

Sponsor
 


Return to Pneumatic Cannon Database

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'