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Two Scuba tanks....Ideas?

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
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Two Scuba tanks....Ideas?

Unread postAuthor: carpenoctem90hrs » Wed May 19, 2010 11:58 pm

Hi all, I have been on this site quite a bit over the past couple of years but this is my first post.

I have been wanting to get into hybrid cannons (yes I have read the wiki) and was hoping some of you would have words of wisdom.

Additionally, I have two aluminum scuba tanks sitting around that I would like to put to good use. Any suggestions? What I would really like is to integrate the tanks into a hybrid cannon.
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Unread postAuthor: MrCrowley » Thu May 20, 2010 12:53 am

One is plenty.

In my opinion anyway. I'll let you read that before I suggest anything else.
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Unread postAuthor: carpenoctem90hrs » Thu May 20, 2010 8:12 am

I was looking at that one last night. Do you think that is a good hybrid design to follow? Also, are burst discs reusable?
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Unread postAuthor: POLAND_SPUD » Thu May 20, 2010 8:40 am

Any suggestions?

sell them and buy some vodka?? :D

You can use build a fridge compressor and use one of them as a tank...

I know it's tempting to use them as chambers for hybrids but you have ot modify them a lot and they only make sense if we're talking about large bore guns...

if you can mod them then you might as well build your own chamebr from the scratch..

maybe it is just me but somehow I don't like the idea of wasting perfectly good HPA tanks :?
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Unread postAuthor: carpenoctem90hrs » Thu May 20, 2010 10:16 am

They were given to me by a friend who doesn't need them anymore, and I have no other use for them. So what you're saying is that building a hybrid off of one of the tanks would be more trouble than it's worth?

I already made one into a pneumatic gun, but my air compressor won't pump it over 100 psi. Any ideas how to get that number higher?

Thanks for the help, I am still open to hybrid suggestions/ ideas for the tanks.
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Unread postAuthor: Gippeto » Thu May 20, 2010 1:04 pm

Errm...


POLAND_SPUD wrote:
Any suggestions?


You can use build a fridge compressor and use one of them as a tank...


Typical suggestion, but still ... a good one. :)

~600 psi seems to be typical for a "fridgy".
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Unread postAuthor: twizi » Thu May 20, 2010 4:18 pm

a huge high presure ball valve gun the ball valve would open fast froma pnetamic ram opening them in a flash like the nitrogen cannon on mythbusters
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Unread postAuthor: Insomniac » Fri May 21, 2010 12:52 am

carpenoctem90hrs wrote: Also, are burst discs reusable?


Uuh, I think you need to do a little more reading into how burst disks function before you even think about building a hybrid...
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Unread postAuthor: chinnerz » Fri May 21, 2010 1:29 am

Insomniac wrote:
carpenoctem90hrs wrote: Also, are burst discs reusable?


Uuh, I think you need to do a little more reading into how burst disks function before you even think about building a hybrid...


I agree!! But to answer your question... No, as they 'burst'.
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Unread postAuthor: Mr.Sandman » Fri May 21, 2010 1:49 pm

Would you like to send one of those fine pressure vessels my way? :D
Perhaps you should use one for spudding and take up SCUBA diving lessons. Also a scuba tank as a chamber is pretty overkill for a pneumatic chamber because of the fact that it bottle necks, which prevents it from performing to it's full potential. And even if you were to use it as a chamber, to get it up to a decent pressure would require a hug volume of air and it would brun a fridge compressor out very quickly.
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Yeah, it's that important.
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Unread postAuthor: POLAND_SPUD » Fri May 21, 2010 5:03 pm

yeah it will require a lot of air... but who said it will burn out a fridge compressor? get a big fan and it can run constantly.. it has been done before by the guy from 4x4 forum (uhmm don't ask me for a link - I can't find it... but it has been done)
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