SpudFiles

Petitlu wrote:I want to pulverize the bullet!

Mix20: 875J - 282m / s bullet 22g

Mix40: 1575J - 378m / s bullet 22g

Get a bigger chamber!

With a chamber of about 450ml and a .75" diameter barrel, I can shoot a projectile twice as heavy (44g) at 230m/s using only a 10x mix.

Your cannon will work brilliantly for projectiles about 15g and less but a larger chamber will probably be needed to get the most out of such high mixes (20x +) shooting reasonbly 'heavy' projectiles.

I have a chamber and one 470ml to 800ml
But 470ml is too much for a cal.50
Against by the barrel is a rifled barrel and .50 cal so I can not change it ....
My balls are made of lead and weigh 22g but I can make heavier or lighter ...

With a chamber of about 450ml and a .75" diameter barrel, I can shoot a projectile twice as heavy (44g) at 230m/s using only a 10x mix.

Your cannon will work brilliantly for projectiles about 15g and less but a larger chamber will probably be needed to get the most out of such high mixes (20x +) shooting reasonbly 'heavy' projectiles.

lol I can tell you know sh## about smallbore guns
0.50" stell bb weights 8.4 grams

sooooo a 15g ammo (let alone 22g) is pretty much as heavy as it can be

POLAND_SPUD wrote:lol I can tell you know sh## about smallbore guns
0.50" stell bb weights 8.4 grams

sooooo a 15g ammo (let alone 22g) is pretty much as heavy as it can be

I was only holding the chamber size constant, not the barrel diameter (as my complaint was about the chamber size)
Projectiles 15g and less for a .75" barrel would be fairly common.

I think the problem with small chambers and heavy projectiles is the energy loss from slow acceleration of the projectile; which is greatly exacerbated with a small chamber relative to projectile weight. A larger barrel would help but is not always as convenient to implement as a larger chamber (a larger barrel requires a sabot, for example).

I can tell you haven't built a working hybrid (at least not one that I've seen)!

There are hybrid style sniper rifled barrel with the forum?

EDIT :

"I can tell you haven't built a working hybrid (at least not one that I've seen)!"

sorry I did not understand ...

Petitlu wrote:My balls are made of lead and weigh 22g but I can make heavier or lighter ...

Wait... Did nobody actually notice this!?
Now I'm wishing I had enough spud bux for a sig

Petitlu wrote: "I can tell you haven't built a working hybrid (at least not one that I've seen)!"

sorry I did not understand ...

That was for POLAND_SPUD, not you

I should take this time to say you have built a wonderful cannon and I'm glad you're willing to join members like jackssmirkingrevenge and DYI in attempting mixes higher than 15x.

I can tell you haven't built a working hybrid (at least not one that I've seen)!

touche


cough cough miniboy cough cough

MrCrowley wrote:

Petitlu wrote: "I can tell you haven't built a working hybrid (at least not one that I've seen)!"

sorry I did not understand ...

That was for POLAND_SPUD, not you

I should take this time to say you have built a wonderful cannon and I'm glad you're willing to join members like jackssmirkingrevenge and DYI in attempting mixes higher than 15x.

Thank you!
I plan to get to Mix30

Most paintball tanks are pressure tested to 3,000 psi (200 BAR).
You probably shouldn't stand close to it when firing at 30X mix, though.
30X will generate about 3000 psi.
When you drilled that hole in the bottom you weakened it a little.

Fnord wrote:Most paintball tanks are pressure tested to 3,000 psi (200 BAR).
You probably shouldn't stand close to it when firing at 30X mix, though.
30X will generate about 3000 psi.
When you drilled that hole in the bottom you weakened it a little.

That hole weakened it a lot. It will flare out and I wouldn't be surprised if one day the fitting came flying out instead of the projectile. Nice cannon, but be careful. Understand the danger that hole can present, especially around 3,000 PSI.

Too late sharpshooter! Beat ya to it.

My balls are made of lead

No my friend...they are solid brass.





As discussed in private, you can post your second ignition system.
I have posted the same a LONG time ago when I wanted to turn a CO2 bottle into a hybrid.
I later decided against building a hybrid alltogether for local legal reasons.

It's the propellant normally used along with that ignition system that is outruled.

Paintball cylinders have a operating pressure of 3000psi and 4500psi are tested!

I know that weakened the hole and I will be prudent, a friend made ​​a simulation of resistance.
If the fitting flies it will not really bad because the bottle will be behind me when shooting.
my second ignition system has not black powder but a primer. I can post then?
Sure? I will not want violate the rules ...

example of the ignition:

if that's against the rules than I'm to blame twice...