My SPAS12

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
Post Reply
ijahman
Private 4
Private 4
Posts: 63
Joined: Mon Nov 30, 2009 4:15 pm
Contact:
Contact ijahman

Mon Oct 25, 2010 4:43 pm

hi everyone this is my latest combustion cannon, its not completely finished yet but it is fully functional.
ghetto powaa
sorry for bad sound on video.
many détails and photo later

<a href="http://www.servimg.com/image_preview.ph ... u=11915007" target="_blank"><img src="http://i21.servimg.com/u/f21/11/91/50/07/dscf0024.jpg" border="0" alt="Image hébergée par servimg.com"></a>
<a href="http://www.servimg.com/image_preview.ph ... u=11915007" target="_blank"><img src="http://i21.servimg.com/u/f21/11/91/50/07/dscf0012.jpg" border="0" alt="Image hébergée par servimg.com"></a>
<a href="http://www.servimg.com/image_preview.ph ... u=11915007" target="_blank"><img src="http://i21.servimg.com/u/f21/11/91/50/07/dscf0019.jpg" border="0" alt="Image hébergée par servimg.com"></a>



[youtube][/youtube]
Last edited by ijahman on Fri Dec 03, 2010 3:16 pm, edited 5 times in total.
Image
Top
User avatar
ramses
Staff Sergeant 2
Staff Sergeant 2
United States of America
Posts: 1679
Joined: Thu May 29, 2008 6:50 pm

Mon Oct 25, 2010 4:57 pm

NICE!!! I love that brass look. Youtube really raped the audio on that one.
POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
Top
User avatar
chinnerz
Specialist 4
Specialist 4
Posts: 470
Joined: Mon Dec 28, 2009 8:08 am

Mon Oct 25, 2010 7:28 pm

Looking good mate!
I agree with ramses, you really pulled off that brass look. But yeah, there is a major syncing issue with video and sound, like 1 second or something...

cant wait to see some more vids and pics.
Keep up the good work :) :)
Image
Top
User avatar
Gun Freak
Lieutenant 5
Lieutenant 5
Posts: 4971
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Been thanked: 8 times

Mon Oct 25, 2010 7:34 pm

Looks awsome! So it's breech loaded? Have you tested the power yet? And the range? What is the fuel etc.
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
Top
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26203
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 569 times
Been thanked: 344 times

Donating Members

Mon Oct 25, 2010 11:06 pm

Even after yourgatling this is still impressive, some details of the fuelling system would be greatly appreciated :) also how are you reloading the projectiles?
hectmarr wrote:You have to make many weapons, because this field is long and short life
Top
User avatar
jrrdw
Moderator
Moderator
United States of America
Posts: 6572
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Has thanked: 39 times
Been thanked: 22 times
Contact:
Contact jrrdw

Donating Members

Mon Oct 25, 2010 11:17 pm

Push button fueling if I'm seeing things right.
Top
ijahman
Private 4
Private 4
Posts: 63
Joined: Mon Nov 30, 2009 4:15 pm
Contact:
Contact ijahman

Tue Oct 26, 2010 3:54 pm

<a href="http://www.servimg.com/image_preview.ph ... u=11915007" target="_blank"><img src="http://i21.servimg.com/u/f21/11/91/50/07/dscf0026.jpg" border="0" alt="Image hébergée par servimg.com"></a>

i use butane gas cartridge,
the refueling is full auto,
how it can be full auto???, well, when i move the breech, the valve (behind) is opening, at the same time a fan will reload with fresh air and butane gaz (via an other valve) is coming (butane is regulated with a little valve, same system on my gatling and my RR6)...
so hard to me to explain ...
it's breech loading.
<a href="http://www.servimg.com/image_preview.ph ... u=11915007" target="_blank"><img src="http://i21.servimg.com/u/f21/11/91/50/07/reload12.jpg" border="0" alt="Image hébergée par servimg.com"></a>
firing test my poor bag
<a href="http://www.servimg.com/image_preview.ph ... u=11915007" target="_blank"><img src="http://i21.servimg.com/u/f21/11/91/50/07/dscf0022.jpg" border="0" alt="Image hébergée par servimg.com"></a>
the valve inlet gaz butane and fresh air :
<a href="http://www.servimg.com/image_preview.ph ... u=11915007" target="_blank"><img src="http://i21.servimg.com/u/f21/11/91/50/07/dscf0121.jpg" border="0" alt="Image hébergée par servimg.com"></a>
Top
User avatar
wyz2285
First Sergeant 2
First Sergeant 2
Austria
Posts: 2385
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Has thanked: 1 time
Been thanked: 3 times
Contact:
Contact wyz2285

Wed Oct 27, 2010 4:12 pm

looks amazing i love it :shock: normaly i'm more a pneumatic guy but may be i will build some thing like this :D
Top
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26203
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 569 times
Been thanked: 344 times

Donating Members

Wed Oct 27, 2010 11:50 pm

Very ingenious, shame it's only at atmospheric pressure though - you have the fabrication know-how to make a hybrid repeater ;)

I'm guessing a nice solid pump handle is also on the cards?
hectmarr wrote:You have to make many weapons, because this field is long and short life
Top
User avatar
Moonbogg
Staff Sergeant 3
Staff Sergeant 3
United States of America
Posts: 1733
Joined: Mon Oct 13, 2008 10:20 pm
Location: SoCal
Has thanked: 160 times
Been thanked: 100 times

Thu Oct 28, 2010 12:38 am

Damn it man! Thats nice!
Top
ijahman
Private 4
Private 4
Posts: 63
Joined: Mon Nov 30, 2009 4:15 pm
Contact:
Contact ijahman

Thu Oct 28, 2010 10:56 am

yes a pump will be made.

i've missed another important feature on my spas12,
it's (how i can explain this ?) it's a "hop up " like system..
or i can say : the ball is blocking during explosion with a ring (in rubber), when the pressure goes up the ball is released at maximum pressure.

this result in an upgraded performance in comparaison with other standard system.

do you know what i want to say.
see this :
<a href="http://www.servimg.com/image_preview.ph ... u=11915007" target="_blank"><img src="http://i21.servimg.com/u/f21/11/91/50/07/dscf0123.jpg" border="0" alt="Image hébergée par servimg.com"></a>
Top
User avatar
qwerty
Corporal 2
Corporal 2
Posts: 678
Joined: Sun Apr 12, 2009 2:16 am

Thu Oct 28, 2010 12:03 pm

Ahhh so you have intergrated an O-ring abit like jsr's high pressure pop off.
I visit occasionally to make unrelated posts.
Top
ijahman
Private 4
Private 4
Posts: 63
Joined: Mon Nov 30, 2009 4:15 pm
Contact:
Contact ijahman

Thu Oct 28, 2010 2:35 pm

<a href="http://www.servimg.com/image_preview.ph ... u=11915007" target="_blank"><img src="http://i21.servimg.com/u/f21/11/91/50/07/dscf0029.jpg" border="0" alt="Image hébergée par servimg.com"></a>
my silencer
<a href="http://www.servimg.com/image_preview.ph ... u=11915007" target="_blank"><img src="http://i21.servimg.com/u/f21/11/91/50/07/dscf0028.jpg" border="0" alt="Image hébergée par servimg.com"></a>
Top
User avatar
Gun Freak
Lieutenant 5
Lieutenant 5
Posts: 4971
Joined: Mon Jan 25, 2010 4:38 pm
Location: Florida
Been thanked: 8 times

Thu Oct 28, 2010 6:21 pm

It's called a detent. It keeps the ammo in the barrel for longer so higher pressure can build up? Is that what you are trying to say? This thing is pure genious, great job. As JSR said, you could have made it a hybrid but it makes up for the 1x mix with the coolness 8)
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
Top
ijahman
Private 4
Private 4
Posts: 63
Joined: Mon Nov 30, 2009 4:15 pm
Contact:
Contact ijahman

Tue Nov 02, 2010 2:18 pm

<a href="http://www.servimg.com/image_preview.ph ... u=11915007" target="_blank"><img src="http://i21.servimg.com/u/f21/11/91/50/07/dscf0030.jpg" border="0" alt="Image hébergée par servimg.com"></a>
Top
Post Reply

Return to “Combustion Cannons”