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hybrid cartridge protoype without burst disk

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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Unread postAuthor: Gun Freak » Fri Dec 09, 2011 3:03 pm

Cool, I see it now.
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Unread postAuthor: jackssmirkingrevenge » Fri Dec 09, 2011 5:45 pm

Boooooooooo...

It doesn't hold pressure past 50 psi. Ah well.
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Unread postAuthor: Gun Freak » Fri Dec 09, 2011 5:48 pm

lol

Nice work :P
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Unread postAuthor: jackssmirkingrevenge » Fri Dec 09, 2011 5:49 pm

Pnoobs don't get to be sassy on hybrid topics ;)
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Unread postAuthor: Gun Freak » Fri Dec 09, 2011 6:01 pm

*squeaky voice* Pneubs don't get to be sassy on hybrid topics meh meh meh :D
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Unread postAuthor: POLAND_SPUD » Fri Dec 09, 2011 6:03 pm

Pnoobs don't get to be sassy on hybrid topics
I am very happpy for ya and i let ya finish
but It doesn't hold pressure past 50 psi
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Unread postAuthor: SpudBlaster15 » Fri Dec 09, 2011 7:30 pm

jackssmirkingrevenge wrote:Boooooooooo...

It doesn't hold pressure past 50 psi. Ah well.


*cough*Piston valve*cough*

:wink:
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Unread postAuthor: Gun Freak » Fri Dec 09, 2011 9:36 pm

Calling me a pneub, when your hybrid can't even hold air :D
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Unread postAuthor: jackssmirkingrevenge » Sat Dec 10, 2011 12:56 am

Gun Freak wrote:*squeaky voice* Pneubs don't get to be sassy on hybrid topics meh meh meh :D


:D

Calling me a pneub, when your hybrid can't even hold air


My 21,754<sup>th</sup> hybrid ;)

POLAND_SPUD wrote:I am very happpy for ya and i let ya finish


:D

SpudBlaster15 wrote:*cough*Piston valve*cough*


That's where this is heading... just wanted to see if I could make it even simpler.
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Unread postAuthor: mark.f » Sat Dec 10, 2011 6:29 am

jackssmirkingrevenge wrote:Boooooooooo...

It doesn't hold pressure past 50 psi. Ah well.


Describe your filling method?
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Unread postAuthor: jackssmirkingrevenge » Sat Dec 10, 2011 7:59 am

mark.f wrote:Describe your filling method?


The fill rig featured in the latter part of this thread.
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Unread postAuthor: mark.f » Sat Dec 10, 2011 6:57 pm

jackssmirkingrevenge wrote:
mark.f wrote:Describe your filling method?


The fill rig featured in the latter part of this thread.


Then how do you get fuel mix behind the piston to seal after removal from the fill rig? Or did you wind up filling from the rear?
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Unread postAuthor: jackssmirkingrevenge » Sat Dec 10, 2011 9:49 pm

The idea was that it would still leak behind the diaphragm, clearly I was mistaken :roll: maybe a pinhole would have solved the problem.
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Unread postAuthor: mark.f » Tue Dec 27, 2011 1:24 pm

Just a semi-random idea, but why not use ball-detents to hold back the projectile? Pretty much the same idea the Striker uses to hold back the piston...
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Unread postAuthor: jackssmirkingrevenge » Wed Dec 28, 2011 12:39 am

mark.f wrote:Just a semi-random idea, but why not use ball-detents to hold back the projectile? Pretty much the same idea the Striker uses to hold back the piston...


I experimented here for a pneumatic cart, for a hybrid though you need some way to regulate detent pressure and you're still left with the problem of sealing. A compressed o-ring is simpler and provides seal and retention.
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