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HV-PBL, High Velocity Paintball Launcher

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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HV-PBL, High Velocity Paintball Launcher

Unread postAuthor: SpudBlaster15 » Fri Jan 04, 2008 10:37 pm

This launcher was inspired by Ragnarok's video, in which a potato is completely obliterated by a paintball. I was so impressed by this, I decided to build a dedicated paintball cannon that was lightweight, reliable, and easy to fill with a track pump or air compressor. This is the result. Given that it fires paintballs, the power is very impressive, and this is possibly the most fun launcher I have ever built.

Specifications
Overall length: ~112"
Chamber: 1.029" x 72" Sch 40 PVC pipe
Barrel: 0.69" x 84" SDR 21 PVC pipe
Valve: Orbit Watermaster Diaphragm valve
Operating Pressure: 50 - 140PSIG
Loading: 3/4" PVC union
Estimated Velocity: 900fps @ 100PSIG, 1000fps @ 140PSIG

Pictures:

Image

Image

Image

Image

Image

And the video:

[youtube]http://youtube.com/watch?v=AZs_9icZsWM[/youtube]
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Last edited by SpudBlaster15 on Fri Aug 01, 2008 1:19 pm, edited 1 time in total.
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Unread postAuthor: mopherman » Fri Jan 04, 2008 10:51 pm

wow, nice. Its really long though, is it hard to aim? Did you block the stock? Was the union loading really worth it? Whats with the coupler about 75% the way down the barrel? Like I said earlier, very cool.
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Unread postAuthor: VH_man » Fri Jan 04, 2008 10:51 pm

thats pretty nice lookin!!!

im gonna go out and say you could have reduced pilot volume a wee little bit by getting rid of all those steel pipes, but otherwise, nice!!!

and try putting a burst disk between that union :D the extra power is great....... Like 3 layers of Aluminum Foil is all you need.
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Last edited by VH_man on Fri Jan 04, 2008 10:54 pm, edited 1 time in total.
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Unread postAuthor: MrCrowley » Fri Jan 04, 2008 10:52 pm

Wow, very nice. I'll try and refrain myself from trashing your topic again :)

I have the same track pump, it leaked at 120psi, and now can't pump sh|t :?
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Unread postAuthor: SpudBlaster15 » Fri Jan 04, 2008 11:01 pm

Mopherman: The length makes it very easy to aim. Yes, I did block off the stock using 2 3/4" PVC end caps. They fit well into 1" PVC fittings. I feel that the union loading was indeed worth it, for the union only cost me $3. The "coupler" about 3/4 of the way down the barrel is actually the bell end of the piece of 3/4" SDR 21 pipe I used as a barrel support.

VH_man: According to GGDT, the extra pilot volume given by the steel elbows actually increases performance.

MrCrowley: Thanks, and yes this pump doesn't seem to work as well as I thought it would, as it is very difficult the pump once you reach 120PSIG or so.
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Unread postAuthor: Novacastrian » Fri Jan 04, 2008 11:03 pm

I think that the damage speaks for itself, very nice video too Spudblaster.
I want to see some marbles or similar tearing there way through something with this launcher. One question: what pressure were you using in the vid?
I assume it was the max 140psi?
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Unread postAuthor: Carlman » Fri Jan 04, 2008 11:08 pm

very nice launcher you got there!

you should make a vid of something going through ply to see the strength of the shots.

I like the steel pipe to move the trigger to a more ergonomic location instead of the usual hose.

PS: is that snow, and is that pvc... be careful
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Unread postAuthor: SpudBlaster15 » Fri Jan 04, 2008 11:09 pm

Thanks Nova.

I used around 100PSIG for all of the shots in the video.

Carlman: One of the large holes in my 3/4" plywood backstop was made by a paintball at 110PSIG. I will video a shot tomorrow if I get a chance.

And yes, that is snow, and that is PVC, but I'm not worried, as it was reasonably warm today (~0*C), and the launcher was resting on a piece of plywood to keep it from directly contacting the snow.
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Last edited by SpudBlaster15 on Fri Jan 04, 2008 11:18 pm, edited 1 time in total.
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Unread postAuthor: TwitchTheAussie » Fri Jan 04, 2008 11:11 pm

Thats nice man. Chuck a scope on and you'll have a :thumbright:.
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Unread postAuthor: Ragnarok » Sat Jan 05, 2008 12:03 am

Well, if I was told that I were to inspire anything, I wouldn't have quite expected to see this.

First things first, I love it, because as Nova says, the damage speaks for itself - that long barrel really gives it some power.
It's also a really attractive cannon. Although I tend to prefer metal cannons, sometimes nicely painted cannons made from PVC or ABS just manage to look nicer for reasons I can't comprehend.

Although that barrel gives it power, the sacrifice in that is the overall length - which I'm have to be picky about in my cannons, because I can't easily store anything over about 7' in length, but if you are lucky enough to have the space, then I suppose that's fine in your case.

If it's fun for you, that's the most important thing.
Most people know that paintballs bruise, but that's at 200 or 300 fps - when you get to over 900 fps, there's a whole different world at those speeds. Keep having fun.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: Solar » Sat Jan 05, 2008 12:59 am

What I am curious about is how the paintballs maintain their shape and therefore accuracy at those velocities, let alone the integrity of the seam. Have you had much problem with them breaking or swerving at greater distances?
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Unread postAuthor: ALIHISGREAT » Sat Jan 05, 2008 7:08 am

oohh thats nice :) should have a fair bit of power :twisted: and it looks good aswell :P
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Unread postAuthor: VH_man » Sat Jan 05, 2008 8:32 am

have you tried putting a burst disk in the union after loading it up?

i think youll find youd be happy with the results.......

EDIT: Wooooowww i didnt realize you had a video (slaps himself)

thats some SERIOUS power for a paintball. jeus christo!!
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Unread postAuthor: Skywalker » Sat Jan 05, 2008 8:57 am

I second Solar's question: do your paintballs fly straight? I've got a slightly smaller gun (3/4" X 5' barrel, 150psi) and I have problems with the paintballs doing what looks like a barrel roll ~ 50-70ft out and then going off in a random direction.
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Unread postAuthor: Ragnarok » Sat Jan 05, 2008 9:54 am

Well, I have a less ideal system, 4' barrel, 300 psi, 0.799" bore (needs wadding)... and I have no damned idea.

At up to the 10 metres I normally fire at, the PBs seem to hit more or less where I aim.
If I try firing up and into the distance... I tell you, keeping track of a paintball doing nearly Mach 1 is impossible, your eyes just can't focus that fast.
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