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QCTBDC: Something Completely Different

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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QCTBDC: Something Completely Different

Unread postAuthor: sgort87 » Sun Jan 21, 2007 12:24 am

I have never made a burst disc cannon (hybrids don't count) and I decided why stop at a plain burst disc gun when I can make a challenge of it?

I have been thinking about the discussions on triggering burst discs for a while and thought it would be nice to have an easier way to do it than using two unions and all that.

I decided to also cure the problem of bust discs being a royal pain in the ass to replace.

This is it what I came up with: The Quick-Change Triggered Burst Disc Cannon. I'd like to let my video do all the talking. (Be sure to open in Full-Screen.)

<a href="http://media.putfile.com/QCTBDC"><b>The QCTBDC</b></a>

Enjoy. :D

And for some details:

What it is, is a lathed union inside of 2.5" pipe with o-rings on it (like a piston) that locks against the other union piece held in place on the front. Air pressure keeps it held in place naturally. All I have to do is bring the "piston" up to the aluminum and it sticks right on.

I tapped into the broadhead and threaded it onto a threaded rod which then threads into the pneumatic cylinder.

This is a prototype model which is why the barrel is not cemented in, stickers are not removed, and it's using "Kevin's" chamber. I think it's still pretty cool... :P
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Unread postAuthor: killagorrila99 » Sun Jan 21, 2007 3:51 am

I love it! ITS FREEKON AWSOME!
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Unread postAuthor: Insomniac » Sun Jan 21, 2007 4:01 am

Wow.......simply amazing....it looks awesome!!

Just dont press the trigger when your hand is in front of the broadhead :shock:
lol
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Unread postAuthor: experament-u2 » Sun Jan 21, 2007 4:05 am

u could make a knife that shoots out and stabs people :violent3:

that is simply an amazing gun :D
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Unread postAuthor: killagorrila99 » Sun Jan 21, 2007 4:06 am

U2, how are you getting those smiley???
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Unread postAuthor: Brian the brain » Sun Jan 21, 2007 4:10 am

Finally!!! A theory put into practice, in a beautiful manner I might add!!

Most theories never make it.
I love the quick change, very well made!!
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Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: Pete Zaria » Sun Jan 21, 2007 4:26 am

Gort,
Beautiful job here. Innovative, effective, and super clean construction for a "draft" model. I'm sure it performs wonderfully, too.
Any chance of some distance tests, ggdt model, and/or damage shots :o ?

Peace,
Pete Zaria.
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Unread postAuthor: sgort87 » Mon Jan 22, 2007 10:27 am

Thanks guys. I'm glad you like it. It was such a rush to make this gun. I can't wait to do more testing with it.

I don't know when I'll have real damage shots. It's pretty cold here now and I have been trying to do less indoor shooting.

I totally suck at GGDT. I have no clue how to do an accurate simulation of this type of launcher.

I'll do what I can though. Thanks again for the compliments.
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Unread postAuthor: joannaardway » Mon Jan 22, 2007 2:33 pm

I love it - I've not seen anything that innovative and original in a while.

I'm surprised the discs get a clean hole punched out of them though. Well, you live and learn.

Kudos for something so slick.
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Unread postAuthor: Hotwired » Mon Jan 22, 2007 5:19 pm

The broadhead would make the initial puncture and the air pressure would tear back the disks from that point but I do agree that it does seem surprisingly neat round the edges.

It'll turn up as aluminium shrapnel in the airflow, might scratch the barrel to a degree.

Great idea and demo. I think a complete design would benefit from a more compact way of puncturing the disk though, thats over a foot of pneumatic cylinder behind the disk.

Last time I thought of easy burst disks I kept thinking of embedded explosive wires :roll: Talk about an imagination overbudget.
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Unread postAuthor: medievalman » Mon Jan 22, 2007 6:21 pm

Thats pretty amazing. I've never seen anything like it. You just keep making these awesome creations!
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Unread postAuthor: judgment_arms » Mon Jan 22, 2007 6:53 pm

Amazing, simply amazing. When the broad-head first went forward, HELO!
Sgort87 you’ve outdone your self.

Now I need to get off my lazy butt and get something done. But first I’m going to watch that thing again.
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Unread postAuthor: sjog » Tue Jan 23, 2007 10:19 pm

SG
In today's e-mail I sent you, I said i'm not a scientist,but you most certainly are!!
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Unread postAuthor: frankrede » Tue Jan 23, 2007 10:29 pm

SGORT I have always expected great launchers from you and this one is by far one of the best. really innovative. Hope it performs well.
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Unread postAuthor: spoeft » Fri Jul 08, 2011 7:31 am

hmm :s the link is dead , can u put the video up again please or maybe some pictures so i can understand the triggered broadhead seal better ?
planning to build one like that myself , and i've heard this was the best triggered BD cannon :)

thx anyways :)
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