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 44 users online :: 4 registered, 0 hidden and 40 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

Simple Clear 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

Simple Clear Combustion.

Unread postAuthor: Biopyro » Tue Aug 14, 2012 9:55 am

I had some spare time in the workshop and some acrylic pipe hanging around so I thought I'd put together a nice cannon. What else could I do with it!?

It's a 90mm chamber with 40mm barrel, using PVC fittings. PVC cement is sufficient for bonding the plastics.
Both the chamber and barrel are 5mm wall thickness, which is pretty chunky. I would not be comfortable going thinner with the chamber, but I definitely could have gotten away with 3mm for the barrel. I tend to just use a regular PVC barrel as a result.

It has a tyre valve for easy fuelling with metered propylene (MAP-PRO), and two electrodes connecting a BBQ igniter to a foil-tape spark strip. The spark strip is peeled up from the wall to prevent skirting, and runs the length of the chamber down two sides. There are 5 gaps.

The cleanout cap is kept well lubricated and spins off very easily for venting. The barrel is pushfit, incredibly easy to remove. Unfortunately this means that the barrel can pop off when it is allowed to get wet.

Pictures (click for full size):

ImageImageImageImage
ImageImage
Image

ImageImageImage



Videos:


From 0:40s
http://youtu.be/Ez9hnlNu2Yg?t=40s
  • 0

Last edited by jrrdw on Thu Nov 07, 2013 1:31 pm, edited 1 time in total.
Reason: Fixed video and video link.
Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety. -Benjamin Franklin
User avatar
Biopyro
Colonel
Colonel
 
Posts: 656
Joined: Fri Aug 04, 2006 5:32 am
Location: UK
Reputation: 0

Unread postAuthor: CS » Tue Aug 14, 2012 2:54 pm

simple=best

Nice construction. Wish I had some clear pvc lying around.
  • 0

User avatar
CS
Donating Moderator
Donating Moderator
 
Posts: 1897
Joined: Fri Feb 18, 2005 5:32 pm
Location: Southern Utah
Country: United States (us)
Reputation: 4

Unread postAuthor: spudamine » Tue Aug 14, 2012 4:09 pm

looks nice, a LED fan inside would add to the pimp factor :D
I recently saw those ignitors appear on ebay and bought one on a whim, it's fantastic :). Mine fires at approximately 10Hz, it's defintely making me feel like it's time for a full-auto combustion.
  • 0

User avatar
spudamine
Sergeant Major
Sergeant Major
 
Posts: 184
Joined: Sun Nov 23, 2008 2:47 pm
Reputation: 0

Unread postAuthor: AircannonSweden » Tue Aug 14, 2012 4:35 pm

Nice one :) Where did you get that cler tube?
  • 0

As always,have a nice day - FPSrussia
User avatar
AircannonSweden
Sergeant First Class
Sergeant First Class
 
Posts: 131
Joined: Thu Oct 27, 2011 11:53 am
Location: Sweden,Linköping
Reputation: 0

Unread postAuthor: Biopyro » Tue Aug 14, 2012 4:36 pm

Ooops, forgot to mention - it was in the title. The chamber and barrel are actually acrylic. I felt comfortable because despite the reduced impact strength, it is still a strong material, and 5mm wall thickness is pretty tough for a relatively un-optimised cannon.

Yeah, I am really pleased with the igniter. Enough to rave about it in another thread even!
  • 0

Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety. -Benjamin Franklin
User avatar
Biopyro
Colonel
Colonel
 
Posts: 656
Joined: Fri Aug 04, 2006 5:32 am
Location: UK
Reputation: 0

Return to Combustion Cannon Database

Who is online

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

Reputation System ©'