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 48 users online :: 4 registered, 0 hidden and 44 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 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

The propane tank combustion chamber

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
Sponsored 
  • Author
    Message

The propane tank combustion chamber

Unread postAuthor: DeathBlade » Fri Nov 24, 2006 3:10 am

Well I was building a golfball launching combustion unit, It took me forever to find some 1.5" SDR-21 and the 2" sch80 to sleeve it in. The SDR-21 the gave me for free(it was scrap) but I had to by the 2" and that was a bit expensive, So I didn't buy and pipe for the chamber as I remembered I had some 3" that I had from putting in a drain. So I get home and low and belond the 3" is DWV not pressure tested. grr But while looking through my shed I found a propane (5gallon, 25lb) bottle that I had taken the valve off and used as a counterweight for my catupult, I dug around and found a 2" castiron pipe nipple I'm going to cut out around the valve and weld in the the 2" cast iron to the tank and I'll put a 2" threaded(female) on the barrel.
Think the LP tank will work as a combution chamber?
  • 0


DeathBlade
Specialist
Specialist
 
Posts: 43
Joined: Fri Nov 24, 2006 2:28 am
Reputation: 0

Unread postAuthor: rna_duelers » Fri Nov 24, 2006 4:33 am

No reason why not,aslong as you have a big barrel to keep the ratio healthy other wize expect some eardrum shattering shots.
  • 0

Image
User avatar
rna_duelers
Major General
Major General
 
Posts: 1740
Joined: Mon Sep 26, 2005 7:07 am
Location: G-land Australia
Country: Australia (au)
Reputation: 1

Unread postAuthor: Pete Zaria » Fri Nov 24, 2006 4:49 am

The only problem I see is that the metal propane tank conducts electricity, which means you'll have to insulate your electrodes from the tank. Easiest way to do this would, in my opinion, be a spark strip. http://www.burntlatke.com/strip.html .

As rna_duelers pointed out, you'll need a pretty long barrel to keep a decent chamber:barrel ratio.

Peace,
Pete Zaria.
  • 0

User avatar
Pete Zaria
Moderator
Moderator
 
Posts: 978
Joined: Fri Mar 31, 2006 6:04 pm
Location: Near Seattle, WA
Reputation: 0

Unread postAuthor: DeathBlade » Fri Nov 24, 2006 11:34 am

I have a 4 foot golfball, and a 7 foot section of plain old 2". Which would you think would be better? and is there any caluations for barrel to chamber ratio?
  • 0


DeathBlade
Specialist
Specialist
 
Posts: 43
Joined: Fri Nov 24, 2006 2:28 am
Reputation: 0

Return to Combustion Cannon Discussion

Who is online

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

Reputation System ©'