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 25 users online :: 7 registered, 0 hidden and 18 guests


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

Registered users: Bing [Bot], Brian the brain, Google [Bot], Google Adsense [Bot], Labtecpower, mobile chernobyl, MSNbot Media based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

My friend Tyler's dual ignition 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

My friend Tyler's dual ignition combustion

Unread postAuthor: SpudBlaster15 » Sun Oct 29, 2006 12:25 am

Image

Image

Image

Image
  • 0

Last edited by SpudBlaster15 on Tue Nov 07, 2006 10:23 pm, edited 1 time in total.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2378
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 1

Unread postAuthor: killagorrila99 » Sun Oct 29, 2006 1:18 am

Loverly job there, Quit using ABS!
  • 0

"I'm sorry, Mr.Bush cant come to the phone right now, He's playing cleudo with Mr. Cheney And he has him in the Cupboard with a broom stick" -White house receptionist.
User avatar
killagorrila99
Brigadier General
Brigadier General
 
Posts: 1101
Joined: Tue Jul 25, 2006 2:35 am
Location: Australia.
Reputation: 0

Unread postAuthor: SpudBlaster15 » Sun Oct 29, 2006 1:26 am

Solid wall ABS is a much better material than PVC for combustion cannon building for several reasons.

1. Its chemical resistance.

2. Its impact resistance.

3. Its ability to retain strength at low temperatures.

4. The fact that if it DOES fail, it will usually fracture cleanly along its length, whereas PVC will fragment and fill you with shrapnel.

Solid wall ABS will EASILY withstand the pressure generated within the combustion chamber.
  • 0

User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2378
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 1

Unread postAuthor: TalonXxX » Sun Oct 29, 2006 2:13 am

Yes, ABS is perfectly fine for combustions only. That being said, very nice cannon
  • 0

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

Unread postAuthor: killagorrila99 » Sun Oct 29, 2006 4:41 am

Hmm ok, I still prefer Ol' pressure pipe to that.
  • 0

"I'm sorry, Mr.Bush cant come to the phone right now, He's playing cleudo with Mr. Cheney And he has him in the Cupboard with a broom stick" -White house receptionist.
User avatar
killagorrila99
Brigadier General
Brigadier General
 
Posts: 1101
Joined: Tue Jul 25, 2006 2:35 am
Location: Australia.
Reputation: 0

Unread postAuthor: malman » Mon Oct 30, 2006 11:18 pm

:x Why is it that every time someone posts a cannon that is constructed of ABS everyone has to argue about which is better/safer ABS or PVCr??? Cant we all just agree to disagree?? I Understand the amount aof care one spudder has for another spudder especially when it comes to saftey, but in all reality does anyone who safely, carefuly and wisely constucts a cannon of the combustion nature no matter what the material have it explode in their general area?? NO The ones that do are the 14 year old idiots who throw one together to impress their friends.


Malman Out
  • 0

User avatar
malman
Private First Class
Private First Class
 
Posts: 26
Joined: Wed Oct 25, 2006 2:14 am
Location: Modesto, Ca
Reputation: 0

Unread postAuthor: Triggahappy » Tue Oct 31, 2006 2:13 am

Lol well said malman, im 13 so i wont take offence to the 14 year old idiot thing. besides i always use pressure rated pvc in my pneumatics and only use them when appropreaite and safe to do so, coz i know some dickheads my age that would screw it up
  • 0


Triggahappy
Specialist
Specialist
 
Posts: 40
Joined: Thu Sep 21, 2006 11:23 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: malman » Tue Oct 31, 2006 3:47 pm

Wanst meaning to point fingers, just prove a point. Anyone can safely build a Cannon
  • 0

User avatar
malman
Private First Class
Private First Class
 
Posts: 26
Joined: Wed Oct 25, 2006 2:14 am
Location: Modesto, Ca
Reputation: 0

Unread postAuthor: joannaardway » Tue Oct 31, 2006 4:13 pm

Even cats, according to your avatar.

"Anyone who has done some reasearch can safely build a cannon" would probably be a better statement.

That way we cut responsibilty for any prats that blow themselves up.

The greatest risk is probably to people that try to copy friend's cannons or what they've half seen on TV or the net without reading up/asking their friend.

Imagine a "Chinese Whispers" cannon - where so much safety information is lost that... well you can guess.

By the way, damned nice cannon there. The handle is good, and the ratio looks pretty good. All respect to your friend.

What is normally fired and how far will it go/what will it go through?

I'll ask what fuel you use as well. Always interesting.
  • 0

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: SpudBlaster15 » Tue Oct 31, 2006 6:48 pm

I havent actually witnessed him firing it yet, but by the sound of things it is quite powerful when using potatos as ammo. The C:B ratio is around 1.2:1, so I would guess a distance of 100 - 150 yards is probable given a good fuel mix with the Axe deodorant he uses.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2378
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 1

Unread postAuthor: reaper613 » Tue Oct 31, 2006 7:16 pm

ya know one day one of the screws you people use as contacts is going to blow out and into your skull
  • 0


reaper613
Corporal
Corporal
 
Posts: 75
Joined: Mon Feb 27, 2006 12:42 am
Reputation: 0

Unread postAuthor: SpudBlaster15 » Tue Oct 31, 2006 7:55 pm

Actually, that is quite improbable. Look at the end of a drywall screw. Notice how little surface area is present? Because transfer of force is depndent on surface area, it is unlikely that the pressure generated within a combustion cannon will transfer sufficient force to the ends of the screws to blow them out. Even if it was theoretically/mathematically possible, the forces exerted on the sides of the screws will be much greater (much higher surface area) and would overcome the outward force.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2378
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 1

Unread postAuthor: frankrede » Tue Oct 31, 2006 8:48 pm

reaper613 wrote:ya know one day one of the screws you people use as contacts is going to blow out and into your skull

In a combustion you get under 60 psi of pressure.not enough to blow it out.
Your more liekly to have a fitting go because it has more surface area.
I have a pneumatic at 150 psi with a 1/4 in guage threaded directly into plastic and it will never blow even at that pressure. And it has more SA than a screw.
  • 0

Current project: Afghanistan deployment
User avatar
frankrede
Lieutenant General
Lieutenant General
 
Posts: 3219
Joined: Thu Jul 20, 2006 9:47 pm
Reputation: 0

Unread postAuthor: malman » Tue Nov 07, 2006 12:47 am

150 psi Wow man sounds pretty gnarly!!!
  • 0

User avatar
malman
Private First Class
Private First Class
 
Posts: 26
Joined: Wed Oct 25, 2006 2:14 am
Location: Modesto, Ca
Reputation: 0

Unread postAuthor: mark.f » Tue Nov 07, 2006 10:19 am

Why? 300 PSI doesn't even seem gnarly to me anymore. That is, when you're not using a pneumatic. :wink:

Class 300 steel fittings can easily take 150 PSI.
  • 0

WIP: unholy mixture of electronics and combustion.
User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3269
Joined: Sat May 06, 2006 11:18 am
Location: Louisiana
Country: United States (us)
Reputation: 13

Next

Return to Combustion Cannon Database

Who is online

Registered users: Bing [Bot], Brian the brain, Google [Bot], Google Adsense [Bot], Labtecpower, mobile chernobyl, MSNbot Media

Reputation System ©'