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Fish Killer 2

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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Fish Killer 2

Unread postAuthor: PVC Arsenal 17 » Thu Nov 15, 2007 8:15 pm

My Fish Killer was a fun gun, but it was quite bulky for something that only shot .40 blowgun darts.

So a couple weeks ago I sought out to improve upon it. I originally intended to make a coaxial because they're the low profile, but I wanted to maintain the quick-disconnect breech that I had on my first gun. In order to do so, I decided to make a coaxial chamber (1.5" x 1/2" sch 80) with a tee so that I could branch 3/4" pipe out from it, use a couple elbows, and bring my QEV behind the chamber with the output port in line with it. My blowgun barrel (taken from my original gun) would then slide within the 1/2" sch 80 inner pipe and connect to my QEV via quick-disconnect. This would make for fast and easy breech loading while keeping the gun as low profile as possible.

Here's how it all worked out (unfinished):

Image

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I thought my idea was genious. It almost reminded me of a Klein Bottle. Then I remembered seeing something on here before that was very similar- The Bergles Cannon. Oh well, it's still cool!

All that I have to now is find the pistol grip blowgun I used on my other gun and this one's finished.

I'm thinking now that the 11" of 3/4" pipe connecting my QEV to the chamber might be somewhat of a restriction. No big deal though... I sort of had to make that long to give my barrel room to slide forward to accomodate 4" wire darts. I couldn't downsize anything either without sacrificing the quick disconnect or creating a weak spot where I epoxied the barrel to the male fitting.
Enjoy.
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Last edited by PVC Arsenal 17 on Fri Nov 16, 2007 10:44 pm, edited 2 times in total.

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Unread postAuthor: mopherman » Thu Nov 15, 2007 8:19 pm

wow, looks great. Doesnt the coaxial chamber make it hard to sight down the barrel?
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Unread postAuthor: potatoflinger » Thu Nov 15, 2007 8:22 pm

It looks pretty cool, I like it!
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Unread postAuthor: the beast » Thu Nov 15, 2007 8:23 pm

I like this one way more than the fish killer 1. Do you know what kind of exhaust valve your going to use?
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Unread postAuthor: BC Pneumatics » Thu Nov 15, 2007 9:04 pm

Boogie man used this design (on a much larger scale) years ago as well.

It is looking very clean man, nice work.
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Unread postAuthor: Maniac » Thu Nov 15, 2007 9:04 pm

looks cool like it a lot.
never seen a qev that big :shock:
also if you can explain this to me im not good with coaxils

if your sliding the barrel all the way through the chamer how does it seal the air out if you can move it seems to me if you used o rings to seal the chaber they would blow out if charged up
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Unread postAuthor: mopherman » Thu Nov 15, 2007 9:06 pm

Maniac wrote:looks cool like it a lot.
never seen a qev that big :shock:
also if you can explain this to me im not good with coaxils

if your sliding the barrel all the way through the chamer how does it seal the air out if you can move it seems to me if you used o rings to seal the chaber they would blow out if charged up

the blowgun isnt sealing the chamber. its sliding in a 1/2 pipe thats sealing the chamber
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Unread postAuthor: VH_man » Thu Nov 15, 2007 9:10 pm

ahha this is what you were talking about. looking good......
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Unread postAuthor: PVC Arsenal 17 » Thu Nov 15, 2007 9:14 pm

mopherman wrote:
Maniac wrote:looks cool like it a lot.
never seen a qev that big :shock:
also if you can explain this to me im not good with coaxils

if your sliding the barrel all the way through the chamer how does it seal the air out if you can move it seems to me if you used o rings to seal the chaber they would blow out if charged up

the blowgun isnt sealing the chamber. its sliding in a 1/2 pipe thats sealing the chamber


That's it.

Unfortunately I f'ed up a little. I measure the pipes wrong and ended up with the 1/2" being too short. It's fully glued into one socket but at the other end it comes short about a quarter of an inch. Shouldn't hurt anything...I hope...
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Unread postAuthor: Maniac » Thu Nov 15, 2007 9:18 pm

oh doh should have read more closely thx cant wit till you finish
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Unread postAuthor: VH_man » Thu Nov 15, 2007 9:22 pm

you do realize that to make the barrel/chamer ration 1/1 all you need is like 6 inches of 1 inch pipe...........

and btw, can i get any tests on stun dart vs target dart accuracy?
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Unread postAuthor: PVC Arsenal 17 » Thu Nov 15, 2007 9:40 pm

VH_man wrote:you do realize that to make the barrel/chamer ration 1/1 all you need is like 6 inches of 1 inch pipe...........

and btw, can i get any tests on stun dart vs target dart accuracy?


Why don't you just try for yourself? :lol: If you already have a blowgun just use lung powerand do some comparisons.

And why are you even using stun darts? Sharp flying objects are much more fun!
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Unread postAuthor: jackssmirkingrevenge » Thu Nov 15, 2007 10:09 pm

cleanly and neatly done, I like it, and I bet that spits out blowgun stingers at a fair rate of knots so penetration tests please :)
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Unread postAuthor: noname » Fri Nov 16, 2007 12:01 am

You've put out some really nice work lately; keep it up!
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Unread postAuthor: nz_cannons » Fri Nov 16, 2007 1:20 am

Sweet looking gun.
What kind of quick disconnect fitting is that?
Like, whats it used on, where did you get it. I havn't really seen many like that before.
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