Search found 9 matches

by KannonKing
Fri May 29, 2020 9:51 pm
Forum: Combustion Cannons
Topic: Propane failing to ignite reliably.
Replies: 6
Views: 178

Re: Propane failing to ignite reliably.

uninc4life2010 wrote:
Wed May 27, 2020 9:30 am
Is your C:B ratio in terms of the volume of each?
Yes
by KannonKing
Wed May 27, 2020 2:14 am
Forum: Combustion Cannons
Topic: Potato Howitzer
Replies: 3
Views: 157

Re: Potato Howitzer

Awesome, can't wait to see it in action... 4th of July? Can blank it off in the back yard? 8-)
by KannonKing
Wed May 27, 2020 1:39 am
Forum: Combustion Cannons
Topic: Propane failing to ignite reliably.
Replies: 6
Views: 178

Re: Propane failing to ignite reliably.

I have to agree, using oxygen is a dangerous additive. If you are adding more than smidge, you're in danger if you finally get the mixture right and it ignites properly. Propane will only ignite between 2.5% and 9.2% by volume with air at sea level, so you may well be under fueling it. Get it all so...
by KannonKing
Mon Apr 27, 2020 1:14 pm
Forum: Combustion Cannons
Topic: New member... my baby, Big Red
Replies: 11
Views: 806

Re: New member... my baby, Big Red

My apologies, I was being a little facetious, I would never consider detonating such a fuel/oxidizer mix. I thought the "miniature vacuum pump" was my obvious tell... I'll be sticking to a high nitrogen content with this device thank you very much. ;) And I'll cancel the snark until you get to know ...
by KannonKing
Sat Apr 25, 2020 2:58 pm
Forum: Combustion Cannons
Topic: New member... my baby, Big Red
Replies: 11
Views: 806

Re: New member... my baby, Big Red

I have not had any problems shooting with additional oxygen. I have completed calibration using propane and mapp, but have not had enough shooting time to test with oxygen. With plain fuel air mix I have achieved about 700 joules muzzle energy (only a 5' bsrrel, so chamber/barrel ratio is high), but...
by KannonKing
Sat Apr 25, 2020 10:46 am
Forum: Combustion Cannons
Topic: New member... my baby, Big Red
Replies: 11
Views: 806

Re: New member... my baby, Big Red

"pure oxygen" and fuel? Maybe you noticed the vacuum pump hidden in the battery box that evacuates the chamber before filling it with "pure oxygen and fuel".
by KannonKing
Fri Apr 24, 2020 10:48 am
Forum: General How-To & Discussion
Topic: Question regarding spigot mortar style ammo.
Replies: 7
Views: 405

Re: Question regarding spigot mortar style ammo.

I made super simple fins, and used a bottle cap wadding, a perfect fit for 1 9/16" barrel!


Image

Image

https://ibb.co/26jyzp3
https://ibb.co/6DJTGVJ
by KannonKing
Fri Apr 24, 2020 10:26 am
Forum: Combustion Cannons
Topic: New member... my baby, Big Red
Replies: 11
Views: 806

New member... my baby, Big Red

https://youtu.be/JKb0yTjrQd0 "Bolt-action" sniper with metered injection, mixing/exhaust fan, "12 round" mag. Thoughts? The barrel is what slides rather than a bolt, and when the breach is open, the checkvalve opens at the butt to allow 5 second exhausting of the chamber before reloading. In the vid...