Search found 20 matches

by KannonKing
Sat Dec 19, 2020 2:58 pm
Forum: Hybrid Cannons
Topic: I got some questions.
Replies: 35
Views: 4134

Re: I got some questions.

Since posting i believe i have figured out my issues. I noticed that if I leave the gun sit for roughly a minute before firing it goes off reliably. I increased the chamber volume aswell. I am in the process of creating a "venturi" fuel mixing system to mix the gasses as the chamber is filled. With...
by KannonKing
Mon Nov 23, 2020 1:29 am
Forum: Combustion Cannons
Topic: Golf Ball Cannon - Suggestions Please!
Replies: 6
Views: 4319

Re: Golf Ball Cannon - Suggestions Please!

To install, you could blutack a piece of padded tape (non-sticky side) on a piece of 1x1 lumber, slide it down the barrel to the right spot, then roll the lumber over so the tape stick at just the right spot... rolling it out again might be a problem though if you overfuel... https://www.uline.com/P...
by KannonKing
Mon Nov 23, 2020 1:15 am
Forum: Combustion Cannons
Topic: Golf Ball Cannon - Suggestions Please!
Replies: 6
Views: 4319

Re: Golf Ball Cannon - Suggestions Please!

In my cannon I just used a piece of double sided tape that holds the ball firmly, but I have a bolt action... viewtopic.php?f=27&t=27104
by KannonKing
Tue Aug 04, 2020 11:26 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Project something
Replies: 5
Views: 2202

Re: Project something

that's a beauty! Can't wait to see it in action!
by KannonKing
Sat Jul 04, 2020 12:08 pm
Forum: Combustion Cannons
Topic: Happy 4th to you all
Replies: 1
Views: 1316

Happy 4th to you all

Wishing you many sharp reports!
by KannonKing
Wed Jul 01, 2020 3:04 pm
Forum: Combustion Cannons
Topic: Using Burnt Latke's fuel tool
Replies: 3
Views: 1686

Re: Using Burnt Latke's fuel tool

Correct, meter pipe volume needs to be approximate, with the fine tuning of moles of propane to moles of oxygen being done by adjusting pressure in the pipe. If you find that you can't get the right load, you can change the length of a nipple on the pipe to add/remove 1/2"+, much as Latke said here....
by KannonKing
Wed Jul 01, 2020 2:18 am
Forum: Combustion Cannons
Topic: Using Burnt Latke's fuel tool
Replies: 3
Views: 1686

Re: Using Burnt Latke's fuel tool

I think I came to the same conclusion about 10 years ago... I assume you found this... it gives a good clue, but I still wasn't sure... I think he means volume of the propane (meter) is 4% and the volume of the air (chamber) is 100% The pressure regulator proved to be the key element. A mid range ba...
by KannonKing
Wed Jun 17, 2020 9:21 pm
Forum: Combustion Cannons
Topic: Multiple ignition points?
Replies: 3
Views: 1064

Re: Multiple ignition points?

http://www.burntlatke.com/strip.html He is right about the veracity of the data, since his standard deviation from 10 shots is bonkers high due to the russet factor, but his data does bear out what we all know instinctively to be true, more sparks (well distributed down the chamber) = more higher i...
by KannonKing
Mon Jun 15, 2020 3:36 pm
Forum: Combustion Cannons
Topic: New member... my baby, Big Red
Replies: 15
Views: 4816

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

Pickle me grand mother. "big belly laugh". Dunno about ya tech thing variables golf balls. Yeah 750 mtr range... I av golfer, smak em 240 mtrs. When I get onto em , Its "Anzac" on the tee. One minute of silence, that is.... Gahahaha. I'd Rekon I give big red, prob 5 mins of silence after seeing it ...
by KannonKing
Mon Jun 15, 2020 3:27 pm
Forum: Combustion Cannons
Topic: Complete Plans for Advanced Combustion
Replies: 39
Views: 30686

Re:

sgort87 wrote:
Tue Nov 07, 2006 3:23 pm
The fan should be placed on the other side of the spark gap or it is at large risk of being blown apart.
Fan at the back is problematic? Mine is mounted about 2 inches from the rear, never had a problem or had to replace it...
by KannonKing
Mon Jun 15, 2020 3:14 pm
Forum: Combustion Cannons
Topic: Propane failing to ignite reliably.
Replies: 9
Views: 2799

Re: Propane failing to ignite reliably.

Easiest way to understand C:B ratio is that if the barrel is too short, the projectile is still accelerating when it leaves the barrel (sub optimal), and if the barrel is too long, NEGATIVE pressure behind the projectile will slow it down before it exits the barrel ( if your barrel is very long, and...
by KannonKing
Fri May 29, 2020 9:51 pm
Forum: Combustion Cannons
Topic: Propane failing to ignite reliably.
Replies: 9
Views: 2799

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: 8
Views: 2867

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: 9
Views: 2799

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...