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Combustion paintball grenade

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Unread postAuthor: )DEMON( » Sat Mar 10, 2007 3:40 pm

Thanks.

Well basically I had this idea for a cap. It would hold the liquid in perfectly sealed (with the help of an o ring and spring) but when force was applied to it, from the piston moving forward, it would open and let the paint fly!

Just look at the pic to see what I mean.

(by the way, lets not go into discussing how to make paint, lol)
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Unread postAuthor: schmanman » Sat Mar 10, 2007 3:48 pm

VH_man wrote:, im saiying internal pressures are going to end up around 125-150 PSI.


um, peak pressures for combustions top out at around 75-80 psi, but most actually produce 60-somthing psi
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Unread postAuthor: Scope » Sat Mar 10, 2007 5:28 pm

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Unread postAuthor: Bluetooth » Sat Mar 10, 2007 5:46 pm

Why is that?
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Unread postAuthor: p0ond nAti0n » Sat Mar 17, 2007 3:29 am

hmm i like it but i think ill stick to my spudzilla that fires cans, some filled with flammable substances some makeshift smoke grenades and some filled with paint :D awesome idea though tell us how it goes
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Unread postAuthor: us sniper » Sat Mar 17, 2007 6:53 pm

Why not try shooting shell out of another gun and havign a syringe type device push out the paint when it hits something.
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Unread postAuthor: )DEMON( » Sun Mar 18, 2007 1:48 am

Thats already been debated here befor. To sum it all up there will not be enough force to eject all the liquid. You ever tried holding a syringe full of water and knocking the piston? All the water didn't just gush out now did it.

Besides that will be a little impractical.

I am trying to design a reliable mechanical grenade that uses compressed air. It must have at least a few secons delay and be strong enough to take a beating and still work.
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Unread postAuthor: us sniper » Sun Mar 18, 2007 2:17 pm

I thought of an idea for a combustion grenade. It would be shot using rockets. A small rocket about the size of a AAA battery. You would something combustable in the center. When the ejection charge shoots from the engine it ignites everything else and the force would push paintballs out that are protected by a wad of the recovery wadding from rockets. The paintballs would be held in by orings that barely hold the paintballs in at all. Another idea, still using the rocket to propel the grenade, except you don't use the charge from the rocket you use a cap. The cap would ignite a soaked sponge which would cause the rest of the fuel to ignite and the paintballs to shoot out.
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Unread postAuthor: )DEMON( » Sun Mar 18, 2007 2:58 pm

This stuff is starting to go against the rules of this forum. That idea doesn't sound very safe to me.

I have some ideas though and I would like to try them out when I get the time.

I have to look into making a timed combustion circuit somehow. I have no idea though.
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Unread postAuthor: imablackskater » Sun Mar 18, 2007 4:16 pm

you could have a timer attached to a 9 volt battery and have a metal plate attached to the timer dial so when it gets to zero it hits another plate completing the circut also have a wire coming from the negative end so you only need one timer.
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Unread postAuthor: LGM » Sun Mar 18, 2007 4:52 pm

AAA battery?
You're talking bottle rockets, you would need at least a "C" class engine to even get it anywhere, and that's like less than 15 paintballs that we're talking about assuming they can withstand the ejection shock. And as )DEMON( said this is going against forum rules.
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Unread postAuthor: imablackskater » Sun Mar 18, 2007 5:00 pm

heres a diagram for what i mean
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Unread postAuthor: Fnord » Sun Mar 18, 2007 7:48 pm

Those kitchen timers sound really suspisious when theyre running btw. probably wouldnt work for paintball unless you wrap them in foam.
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Unread postAuthor: )DEMON( » Mon Mar 19, 2007 3:04 am

I am going to try talk to this guy about the timer. All I want is for it to delay for a few secons befor letting current to the spark gap. It shouldn't be too hard and I suspect there may be an off the shelf item for this purpose.

Will it work if I just hook a cell up to a small transformer, then have the output leading to a capacitor just befor the spark gap and a switch that completes the circuit, so when you flip the switch all the stored energy from the capacitor makes a spark?
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