Login    Register
User Information
We are a free and open
community, all are welcome.
Click here to Register
Who is online

In total there are 62 users online :: 3 registered, 0 hidden and 59 guests

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

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot] based on users active over the past 5 minutes

The Team
Global Moderators
global_moderators.png CS

Firing problem

A place to ask general spud cannon related questions.
  • Author

Unread postAuthor: Pete Zaria » Thu Aug 31, 2006 1:35 am

Just for comparison, on my old cannon (ABS combustion with 250ci chamber, no propane meter), I use 6-7 seconds of propane from a reasonably fresh tank and benzomatic torch head. I wouldn't think you'd need more than 10 for a 350ci chamber.

Propane is heavier than air, so when fueling, you should point the barrel downwards and put fuel in from the cleanout in the back.
What I do is open the valve and stick the torch head down inside the chamber, count to 7 or 8, pull the torch out, replace the cap, turn off the torch, aim the barrel upwards for a few seconds so the propane distributes around the chamber, then aim and fire.

Another possible problem is that the propane isn't mixing with the air very well. Putting a computer fan ($3) in the chamber solves this problem. Look around the site for insturctions on wiring it, but it's pretty self explanitory. Don't bother with a timer circut, just use a momentary on switch.

How many spark gaps do you have, and where in the chamber are they placed?

Good luck.

Pete Zaria.
  • 0

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


Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot]

Reputation System ©'