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wich is better?

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wich is better?

Unread postAuthor: Rambo » Thu Jun 08, 2006 12:25 am

What do you think?If I make a combustion, will a coaxial be better?
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Unread postAuthor: )DEMON( » Thu Jun 08, 2006 1:52 am

There will be less chamber volume but more barrel legth, I have no idea, if I where you then I would test both.
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Unread postAuthor: Benny » Thu Jun 08, 2006 2:00 am

i think you should make it coaxial.
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Unread postAuthor: Rambo » Thu Jun 08, 2006 8:10 am

I think that the coaxial is better for heavy projectiles and the other way is better for light projectiles.The fuel mix in the coaxial will burn slower.
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Unread postAuthor: frogy » Thu Jun 08, 2006 8:20 am

A Coaxial Combustion isn't much different than a regular one... Overall a coaxial combustion makse a much shorter gun.

But it also increases the pressure in the chamber because it all has to travel back towards the end cap.

Like Rambo said, the fuel with burn slower, it burns slower because it has to burn around the barrel in a cirular motion...

A multi-spark ignition would make a coaxial combustion better than a regular combustion, but a single spart coaxial IMO wouldn't do much more than make the gun shorter...


A multi-spark, propane injection coaxial combustion would be great though and most likely more powerful than an Inline multi-spark propane with the same C:B.


Joel had made one of these before, so ask him?
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Unread postAuthor: jrrdw » Thu Jun 08, 2006 5:38 pm

I think to have presure going one way will allways be faster and stronger, without a dought in my mind!
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Unread postAuthor: NeoSpud » Thu Jun 08, 2006 8:26 pm


But it also increases the pressure in the chamber because it all has to travel back towards the end cap.

No, it doesn't.
Like Rambo said, the fuel with burn slower, it burns slower because it has to burn around the barrel in a cirular motion...

Again, no.
A multi-spark ignition would make a coaxial combustion better than a regular combustion, but a single spart coaxial IMO wouldn't do much more than make the gun shorter...


A multi-spark, propane injection coaxial combustion would be great though and most likely more powerful than an Inline multi-spark propane with the same C:B.

...No.


A coaxial combustion is nice because you can easily breach load and vent through the same cleanout. The barrel in the middle of the chamber decreases chamber volume, though, as well as makes a good fuel mixture more difficult without a fan. Not impossible, just more difficult.

Frankly, I don't like em that much. They're a hassle to load (rub knuckles on the cleanout threads), etc.
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Unread postAuthor: sgort87 » Thu Jun 08, 2006 9:01 pm

Agreed, those things hurt. If it were in a 6" cannon maybe things would work out but 4" pipe doesn't allow much space for your hand.

That and it's a royal pain in the ass to cement the barrel into place and stabilize the back end of it. Mine didn't last long before I got pissed at it for the bloody knuckles and wobbly barrel. I had some fun with the cement patio that day...
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