What I want in an anti-tank cannon.

[doc_Zox]

so how many shots do you get off of a tank?

our Ballista drinks deep from the CO2 tank

[Rhinopkc]

I don't have an exact count because i was using a nitro tank and I had all day air, so I was topping off whenever I came in for a break. I can get 3 shots off of a 12 gram. I need to get a smaller compressed air tank, I have an 88/3000 aluminum, after a full day of play my butt was dragging from the extra weight!

[kemikos]

Originally posted by doc_Zox
will it sail a nerf 75 yards?

Don't know yet. I live in an urban area, so I haven't had a chance to test for range.

But does it matter? I'm only going to use it for scenario games, where launchers are limited to the same velocity (230 FPS, for any producer that uses GSRP 3.02). If your launcher is getting 75 yards @ 230 FPS, then I'd say yes, mine will too (same projectile + same muzzle velocity = same range).

The Destroyer is a high-pressure design (up to full CO2 pressure - around 850 psi), though, so it accelerates the Nerf faster; it shouldn't need as much barrel length. It might waste more air than a low-pressure design, although since the valve opens faster than most, it might not.

The pressure chamber is a 3.5 oz. CO2 tank. The air line attaches to the on/off valve, and the butt end of the tank is welded to a fitting that attaches to the ball valve. The bolt in front of the grip frame is the velocity adjuster. It blocks off part of the air passage to slow down the expanding gas. Effective, but wasteful. A regulator should make velocity control finer and more efficient. Fortunately, it just so happens that I have a spare Stabilizer laying around here somewhere...

Oh, and while I haven't used one of the Blackpoint LAWs, I got to see the prototype last year. Rhino has it right; it's a solid, foolproof design. All I know about the valve is that it's air-piloted; I do remember the BP rep saying that the production models were going to be limited to under 200 FPS. I don't know if that's actually the case or not.

Kenn

[Rhinopkc]

Where did you get that m-14 mag?

[kemikos]

Originally posted by Rhinopkc
Where did you get that m-14 mag?

http://www.extremesportsandhobbies.com

The M-14 has been discontinued, but you can still see the info page at http://www.extremesportsandhobbies.com/m14.html.

Kenn

[Rhinopkc]

That's a shame, they keep all of the crappy looking ones in production and get rid of the best looking one.

[Smakman]

Thanks for all of the info on the Blackpoint launcher. Sounds like it is exactly what I want. Now, to come up with a reasonable excuse to spend the money on it........

[Rhinopkc]

you won't be sorry

[kemikos]

Originally posted by Rhinopkc
That's a shame, they keep all of the crappy looking ones in production and get rid of the best looking one.

Oh, if you come up with the money and ask nice, Vance'll probably build you one. Apparently they didn't sell too well; I was told there are about 5 of them (Mine's the only one with a real wood stock).

You want to see a really cool discontinued model, check this out...

http://www.extremesportsandhobbies.com/m60.html

Kenn

[rkjunior303]

guys,

i was lookin to make a grenade launcher type law attached to a wood stock.. I didn't want to use a ball valve though -- I was thinking a sprinkler valve.. the electronic trigger is rather easy so that wouldnt be a problem but I had one question...

Would I have to use a anti-syphon valve? Since I was mounting this on a stock, i would really love it to be inline between the barrel and the 12g quick change.. Would an inline sprinkler valve work or does it HAVE to be an anti-syphon valve? (unless they make inline anti-syphon valves)..

[TheTramp]

I'd use an anti-siphon if the tank will be on it's side.

More importantly, you'll need a CO2 friendly reg that will keep your output under 100psi. I'm planing on using 12grams then switching to a Max-Flow reg

[doc_Zox]

a palmer stabilizer makes a great inline pressure regulator

but by the time you pay for that
and mod a sprinkler valve and buy X bucks of plastic pipe & fittings

yer geting close to a down payment on the BPE unit

and the head ref is going to want to inspect yer handiwerk...

[Rhinopkc]

Originally posted by rkjunior303
guys,

i was lookin to make a grenade launcher type law attached to a wood stock.. I didn't want to use a ball valve though -- I was thinking a sprinkler valve.. the electronic trigger is rather easy so that wouldnt be a problem but I had one question...

Would I have to use a anti-syphon valve? Since I was mounting this on a stock, i would really love it to be inline between the barrel and the 12g quick change.. Would an inline sprinkler valve work or does it HAVE to be an anti-syphon valve? (unless they make inline anti-syphon valves)..

You do not want to use an anti-siphon sprinkler valve, you need to use an inline valve and modify it to trigger pneumatically.Like this

[TheTramp]

Originally posted by Rhinopkc


You do not want to use an anti-siphon sprinkler valve, you need to use an inline valve and modify it to trigger pneumatically.Like this

That's a great mod. I've got mine set-up like that and it dumps the chamber much more quickly than the solinod did.

[rkjunior303]

Originally posted by Rhinopkc


You do not want to use an anti-siphon sprinkler valve, you need to use an inline valve and modify it to trigger pneumatically.Like this

Thanks! that is perfect! That will be great.. Now, onto the air supply.. If I have a 12g quick changer going into the inline, what will I need going between the two to make sure it's around the 100psi mark? Will the 12 grams of CO2 alone make sure of this or do I need some sort of reg between the quick change and the valve?