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| carter |
 Posted: 12/29/2007 21:01 PM Post subject: hybrid cartridges |
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Corporal
Joined: 05 Mar 2007
Posts: 74
123.74 Spud Bux
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ok now that i had have sorted out spark problems, i've started out with designs; playing with ratios and size ideas. while doing research on these using the old spudtech forums i came across this - http://www.spudfiles.com/spudtech_archive/viewtopic.php?t=15702
which got me thinking hard about a few problems with hybrids, actually with all guns. the charging. then the idea came pre-made chambers or cartridges.
what i am thinking is making a all in one cartridge. including ammo, sparkers, gas and burst disc.
how i was going to inter grate this into the gun is to make a rear loading cartridge housing. that is shut off using a gate at the rear to hold the cartridge in place. sealing the front of the cartridge isn't a problem as i will sleve it into the barrel and seal it most likely using o-rings.
the only thing that is bugging me is how i will allow the spark to the cartridge. my first thought came to me from a torch. how the battery touches the light housing allowing power to hit the light. mounting a system like this to the back or top. actually you could put this anywhere to allow power to run to the sparkers.
all i need to no is; will it work, what problems i could get and is there a way to better the plan?
cheers |
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| rp181 |
| Posted: 12/29/2007 21:34 PM Post subject: |
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Lieutenant Colonel
Joined: 13 Dec 2007
Posts: 485
104.04 Spud Bux
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| nice idea, for the ignition, i would try rocket motor igniters, that way there is no high voltage. |
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| carter |
| Posted: 12/29/2007 21:42 PM Post subject: |
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Corporal
Joined: 05 Mar 2007
Posts: 74
123.74 Spud Bux
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i'm in aus. so thats a problem we can't make rockets.
also the gun would be steel for safety so i have to factor in problems caused by this |
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| Hotwired |
| Posted: 12/30/2007 3:19 AM Post subject: |
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UK Spudgunner
Joined: 13 Oct 2006
Posts: 1807
3910.89 Spud Bux
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I sketched up a hybrid cartridge system a whiles back, all it needed was two metal rings on the cartridge and two sparking probes inside.
Hybrid RPG
No it's not really a rpg  |
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| carter |
| Posted: 12/30/2007 5:08 AM Post subject: |
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Corporal
Joined: 05 Mar 2007
Posts: 74
123.74 Spud Bux
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| cool idea but the problem still comes with the safe all steel construction. i'm stumped atm so i just need a few ides |
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| jackssmirkingrevenge |
| Posted: 12/30/2007 5:14 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7050
11306.91 Spud Bux
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here's some experiments I had done with combustion cartridges, I managed to get it to eject succesfully but the project was shelved.
The idea for a hybrid cartridge is not new and has been proposed several times, this was my design but never got round to making it.
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| carter |
| Posted: 12/30/2007 5:17 AM Post subject: |
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Corporal
Joined: 05 Mar 2007
Posts: 74
123.74 Spud Bux
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| would cast epoxy be strong enough and seal well enough for it. thats pretty much the idea i had in my head. if you think it can seal well and not blow out for a 8 mix i will make a proto type cartridge. |
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| jackssmirkingrevenge |
| Posted: 12/30/2007 5:31 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7050
11306.91 Spud Bux
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| Proper epoxy done well should be more than enough to restrain the pressure. |
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| ALIHISGREAT |
| Posted: 12/30/2007 5:32 AM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
Posts: 1311
1007.17 Spud Bux
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| the epoxy holding the ammo in place would 'burst' at different pressures every time and be inconsistent... so surely a burst disc would be better although it would spoil the clean lines of the cartrage. |
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| jackssmirkingrevenge |
| Posted: 12/30/2007 5:41 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7050
11306.91 Spud Bux
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| ALIHISGREAT wrote: | | surely a burst disc would be better although it would spoil the clean lines of the cartrage. |
Well, I had this idea for a burst disk cartridge (not a hybrid though), it would require some machining to be done.
Actually, now that I've had it up to *indicates area well above head* here with reciprocating bolts, I might just give this idea some more consideration... |
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| carter |
| Posted: 12/30/2007 5:41 AM Post subject: |
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Corporal
Joined: 05 Mar 2007
Posts: 74
123.74 Spud Bux
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| used at the rear to house the wires though would it hold. mine will use a burst disk |
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| ALIHISGREAT |
| Posted: 12/30/2007 5:44 AM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
Posts: 1311
1007.17 Spud Bux
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looks cool, i was gonna suggest you start up this idea again after your failure but you already seem to have thought of that.
p.s. woo i got a title  |
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