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 13 users online :: 4 registered, 0 hidden and 9 guests


Most users ever online was 101 on Fri Nov 22, 2013 4:13 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

Remote Ignited DWV Advanced Combustion

Built a combustion cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

Remote Ignited DWV Advanced Combustion

Unread postAuthor: bigbob12345 » Fri Jun 20, 2008 11:32 am

Well here is an advanced combustion I recently made out of mostly recycled parts.
I call it Remote Ignited DWV Avanced Combustion or RIDWVAC for short

Pic with no barrel on
Image

Well as you see it is DWV, this is why I "remote fire" it. It is all solid core DWV ABS except for the barrels, one is cell core abs and the other is sdr21 pvc.
Well I wouldnt really say that it is a true remote igniting system, its just some extended wires attatched to an electric BBQ ignitor. I stand back 5-10ft when I fire it, or just hide behind something.
I also pressure tested the chamber to 180psi(remotely) and it didnt burst, crack, or leak. I thought I would feel safe firing it in my hands if it survived that but I didnt, and settled on a remote ignitor.

And I bet all of you are thinking OMGWTFBBQ BIGBOB IS A HIPPOCRIT!!!1!!1!!ONE!!1!. Well, I guess I sort of am. I scold people for using dwv and then I build one out of DWV for my self.
But I had almost all these parts already and coulntnt resist a $10 advanced combustion.

Im going to build a similar one out of pressure rated pvc in a week or two so I can actually fire it in my hands and feel the recoil.

OK, thats enough of the DWV stuff, im now actually going to start talking about the gun itself.

Well, it has a propane meter, double gap igniton, and a good chamber to barrel ratio. the only thing its missing is a chamber fanand a pressure rated chamber. Well, I couldnt be bothered to put one in a gun that is only temporary. I guarrentee you that my pressure rated one will have one though.

Spec time

Chamber: 12in of 3in solid core DWV ABS
Barrels:50in of 1.5in sdr21 and 52in of 1.5in cell core abs
ignition: electric BBQ ignitor wired so It can be fired up to ten feet away
CB: GB barrel: .75:1, Potato Barrel: .8:1

Video time

[youtube]http://www.youtube.com/watch?v=WG8UKscMdjY[/youtube]


and some more pics

Image
Image
Image
Image
Image
Image
Image

and thats it
  • 0

User avatar
bigbob12345
Major General
Major General
 
Posts: 1516
Joined: Sat Dec 01, 2007 9:13 am
Location: Mercer Island,Washington
Reputation: 0

Unread postAuthor: SpudFarm » Fri Jun 20, 2008 11:39 am

cool gun.

sems like it has some kick to.
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: bigbob12345 » Fri Jun 20, 2008 12:01 pm

Thanks
And it has a lot of kick because it is very light.
  • 0

User avatar
bigbob12345
Major General
Major General
 
Posts: 1516
Joined: Sat Dec 01, 2007 9:13 am
Location: Mercer Island,Washington
Reputation: 0

Unread postAuthor: Spuddin » Fri Jun 20, 2008 12:11 pm

aint those electric bbq sparkers great, i just started using one and i love it. btw your gun would be a perfect drain pipe test gun to see how long it can take the pressure. good idea on the remote ignition, safety first..
  • 0

User avatar
Spuddin
Donating Member
Donating Member
 
Posts: 262
Joined: Wed May 16, 2007 1:28 pm
Location: Oklahoma
Country: United States (us)
Reputation: 0

Unread postAuthor: starman » Fri Jun 20, 2008 12:40 pm

That sparker actually looks like it's got stungun guts...would make sense.

I would be a little leary stretching that High V out like that. I'm sure that voltage can easily arc through that standard insulation. Closing your spark gaps down some will help prevent the arcing outside the gun.

This is good for a test project...now build that pressure rated one... :wink:
  • 0

User avatar
starman
Donating Moderator
Donating Moderator
 
Posts: 3040
Joined: Wed Dec 12, 2007 12:45 am
Location: Simpsonville, SC
Reputation: 0

Unread postAuthor: SpudFarm » Fri Jun 20, 2008 1:39 pm

starman wrote:I would be a little leary stretching that High V out like that. I'm sure that voltage can easily arc through that standard insulation. Closing your spark gaps down some will help prevent the arcing outside the gun.


i have used an ignition coil and camera cap through 1mm speaker wire and it works nice.
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: iPaintball » Fri Jun 20, 2008 2:02 pm

Nice gun, although it's really not necessary to remote fire it... IIRC combustion guns only produce between 60 and 80 psi for a very short period of time. Even if for some reason this gun were to rupture, it would only tear the ABS.
  • 0

Summer Projects:
CO2 tank hybrid: Gotta fix the meter :(
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
User avatar
iPaintball
Colonel
Colonel
 
Posts: 695
Joined: Sun Mar 04, 2007 8:37 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: SpudFarm » Fri Jun 20, 2008 2:14 pm

agree. you saw how much DYI's barrel took.
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: bigbob12345 » Fri Jun 20, 2008 2:22 pm

Spuddin: Yeah they are great
They are cheap(relitively), easy to get hold of, and effective.

Starman: Yep it sparks through the wire like it isnt even there.
I just had a bunch of this stuff laying around and could be bothered to spend ten bucks at lowes and get some HV wire. And I already did close the spark gaps a little because I had this guns first misfire which I blame on the spark gaps.

ipaintball:Yes I know that it is common belief that ABS tears but that is not how it happened when my spray and pray went boom a year ago.
And even if it tears there is still hot gasses blowing out of that tear, and it might hurt if they came into contact with you. I just dont trust DWV...

Spudfarm: DYI's barrel was solid core, like the chamber of this gun but unlike the potato barrel.

Edit: 1500 posts
yaaaayyy
  • 0

User avatar
bigbob12345
Major General
Major General
 
Posts: 1516
Joined: Sat Dec 01, 2007 9:13 am
Location: Mercer Island,Washington
Reputation: 0

Unread postAuthor: STHORNE » Fri Jun 20, 2008 4:43 pm

nice build bob, and congrats on 1500
  • 0

Forum Rules - follow them or else!
“Happiness is the meaning and the purpose of life, the whole aim and end of human existence”
User avatar
STHORNE
Donating Member
Donating Member
 
Posts: 1208
Joined: Wed Feb 14, 2007 7:50 pm
Location: Kewaunee, Wisconsin
Reputation: 0

Unread postAuthor: bigbob12345 » Fri Jun 20, 2008 5:30 pm

Thanks

And Im really bored so I might just go make another video of it.
Any request on ammo/targets?
  • 0

User avatar
bigbob12345
Major General
Major General
 
Posts: 1516
Joined: Sat Dec 01, 2007 9:13 am
Location: Mercer Island,Washington
Reputation: 0

Unread postAuthor: Spuddin » Fri Jun 20, 2008 5:37 pm

a jug of water hit with a gb would be in order...
  • 0

User avatar
Spuddin
Donating Member
Donating Member
 
Posts: 262
Joined: Wed May 16, 2007 1:28 pm
Location: Oklahoma
Country: United States (us)
Reputation: 0

Unread postAuthor: VH_man » Fri Jun 20, 2008 5:49 pm

some kind of shotgun round, like marbles or Airgun BB's
  • 0

User avatar
VH_man
Major General
Major General
 
Posts: 1827
Joined: Sat Dec 09, 2006 6:00 pm
Location: New Hampshire
Reputation: 0

Unread postAuthor: SpudFarm » Fri Jun 20, 2008 6:02 pm

lead slugs at big old toy cars is fun.

ar at a big rock to get the nice bullet afterwards
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: bigbob12345 » Fri Jun 20, 2008 7:05 pm

Spuddin: Consider it done

VH_man: Ill do that too

But spudfarm I currently am out of lead so that will have to wait.
  • 0

User avatar
bigbob12345
Major General
Major General
 
Posts: 1516
Joined: Sat Dec 01, 2007 9:13 am
Location: Mercer Island,Washington
Reputation: 0

Next

Return to Combustion Cannon Database

Who is online

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

Reputation System ©'