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 29 users online :: 7 registered, 0 hidden and 22 guests


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

Registered users: Bernie_McGee, Bing [Bot], BowerR64, Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

All-Poly

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

Unread postAuthor: POLAND_SPUD » Tue May 29, 2012 8:28 am

now please test it with some stuff (e.g. wires) put in the chamber
just like mythbusters did in their episode on sewage pipes & explosions
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 7

Unread postAuthor: Petitlu » Tue May 29, 2012 8:36 am

wires? ok
I have tested by putting a heavy projectile and a rupture disc is a piece of tape, I could shoot a burning very interesting!

Image
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: Petitlu » Tue May 29, 2012 11:31 am

video :

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


[youtube]http://www.youtube.com/watch?v=NgnxEK6NIFs[/youtube]
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: POLAND_SPUD » Tue May 29, 2012 12:13 pm

ohh it's awesome - LOVE how at 0:13 you can see the sabot being sucked back into the chamber
guess it took too long for a large projectile to accelerate so the temperature, and thus pressure, dropped

so did the wires increas flamefront propagation speed? (lol DYI I admit I don't even know what it means)
  • 0

Last edited by POLAND_SPUD on Wed May 30, 2012 2:33 pm, edited 1 time in total.
Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5339
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 7

Unread postAuthor: Petitlu » Tue May 29, 2012 12:24 pm

last video :

[youtube]http://www.youtube.com/watch?v=ackRXRTjZc0[/youtube]
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: boyce123 » Sun Jun 03, 2012 10:58 pm

would it be possible for you to put a chamber fan in to view the suposed 'vortex' that is generated.
  • 0

User avatar
boyce123
Corporal
Corporal
 
Posts: 62
Joined: Fri May 25, 2012 12:29 pm
Location: North Bend, Washington
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Sun Jun 03, 2012 11:46 pm

Interesting idea, I'll see if I can put a fan in mine.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 23700
Joined: Thu Mar 15, 2007 11:28 pm
Location: epoxy batcave
Reputation: 44

Sponsored

Sponsor
 


Unread postAuthor: boyce123 » Mon Jun 04, 2012 12:59 am

no matter how, the introduction of a chamber fan generally creates more power, it would be interesting to see how/why this occurs, this idea was brought up by fnord, but it was glossed over on the first page... i didn't want to take credit for the idea
  • 0

User avatar
boyce123
Corporal
Corporal
 
Posts: 62
Joined: Fri May 25, 2012 12:29 pm
Location: North Bend, Washington
Reputation: 0

Unread postAuthor: Petitlu » Mon Jun 04, 2012 1:10 am

Can I put a fan in the room, it's not a worry! I've done tests with the wires at the request of a menber!
:D
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: Petitlu » Thu Jun 07, 2012 2:01 pm

as promised, the fan! I only made ​​tests with butane as well. I used the fan to mix the air and butane

[youtube]http://www.youtube.com/watch?v=4wurV9GcxHo[/youtube]
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: al-xg » Thu Jun 07, 2012 2:06 pm

It would be nice to try some shots with he fan on during combustion as a comparison; I am assuming that was what boyce123 was talking about ?
  • 0

User avatar
al-xg
Colonel
Colonel
 
Posts: 643
Joined: Fri Jan 19, 2007 12:29 pm
Reputation: 0

Unread postAuthor: Petitlu » Thu Jun 07, 2012 2:16 pm

you want me to draw while the fan is running?
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: al-xg » Thu Jun 07, 2012 2:19 pm

Yes, increased turbulence in the chamber is meant to cause faster combustion.
  • 0

User avatar
al-xg
Colonel
Colonel
 
Posts: 643
Joined: Fri Jan 19, 2007 12:29 pm
Reputation: 0

Unread postAuthor: Petitlu » Thu Jun 07, 2012 2:22 pm

ok
I'll see it tomorrow!
I made one last shot (sadly not filmed), a real gun, the most violent of all!
  • 0

User avatar
Petitlu
Brigadier General
Brigadier General
 
Posts: 807
Joined: Fri Jun 03, 2011 4:52 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Fri Jun 08, 2012 5:44 am

I gave it a go withthis, look at that flame!

[youtube]http://www.youtube.com/watch?v=0D-QZ2ws9jk[/youtube]
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 23700
Joined: Thu Mar 15, 2007 11:28 pm
Location: epoxy batcave
Reputation: 44

PreviousNext

Return to Combustion Cannon Database

Who is online

Registered users: Bernie_McGee, Bing [Bot], BowerR64, Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media

cron
Reputation System ©'