combustion cartridge prototypes

[jackssmirkingrevenge]

Just thought I'd host the diagrams and photos from my R&D into combustion cartridges here as they no longer appear in the archived spudtech thread.

[spud yeti]

JSR, I really and truly love the ingenious and absolutely awesome ideas you perceive, not to mention your drawings!
How well did/does it work though?
hall of great spudguns tour, pretty lady giving tour: "And here we have another beautiful piece of ingenuity by jackssmirkingrevenge to our left..."

[jackssmirkingrevenge]

Thanks, I try

The 6mm cart was a real sissy of a round and next to useless but the 3/4" one worked quite well and was powerful enough to easily put a marble through 1/4" ply, plus it had more than enough energy to eject the cartridge.

I still have the prototypes but I had put them aside as the "coaxial" style cartridge requires a certain precision to get things aligned and working smoothly, it's something I couldn't achieve with my limited tools. With combustions you need cartridges that are larger in diameter than the barrel to get enough power so the problem is unavoidable.

I might revisit the idea in the future but for no it's happily gathering dust on the shelf.

[spud yeti]

Thats pretty darn powerful! (especially for the gun design and complexity)
Yeah, combustions can be quite finicky compared to pneumatics when they get advanced. But I think its a cool concept, so perhaps you should try revisit it from a pneumatic stance next time (I guess thats basically your preloaded pneumatic cartridge preoject then though )
What tools do you have to work with?

[jackssmirkingrevenge]

perhaps you should try revisit it from a pneumatic stance next time

already did that

What tools do you have to work with?

What I use for spudguns is basically a hacksaw, a vice, hand files, a powerdrill and sandpaper. Not exactly precision engineering

[spud yeti]

already did that

Too true, as I said in the above posts. How would you revisit it in combustion though, better precision and workmanship/quality/functionality?

What I use for spudguns is basically a hacksaw, a vice, hand files, a powerdrill and sandpaper. Not exactly precision engineering

Snap, except take the plural away from "files"

[Tom]

How dus the ejecting of the shel work?

[jackssmirkingrevenge]

If you have a look here:



Note how the on the closed side of the breech, it narrows at the end. The base of the cartridge hits the edge, and simply tips outward towards the open end of the breech.

How would you revisit it in combustion though, better precision and workmanship/quality/functionality?

Ideally it would be a hybrid cartridge so it would have power to spare, but then it's too complex to make unless you had a machine shop.

[ondskehem]

Now this is creativity as it should be! Awsome job.

[iknowmy3tables]

I'm sure its been thought of many times, but your the first to make it which makes all the difrence

I belive you mentioned it but now i finally see the whole thing, I really like this

so what do you think about this is it a practical concept, should it be brought to hybrid level

[jackssmirkingrevenge]

so what do you think about this is it a practical concept, should it be brought to hybrid level

At hybrid level I see it as being powerful enough to work reliably in a firearm-style blowback configuration, my vision is something like the diagram attached.

Any takers with a lathe and machining 5k1LLz?

[FeLeX]

Why not make it a oxy-propane hybrid so that you wouldn't have to have lathe skills?

[jackssmirkingrevenge]

Why not make it a oxy-propane hybrid so that you wouldn't have to have lathe skills?

That's an idea...

[FeLeX]

Just meter it out with a syringe and just inject it in there and put the marble in and there ya go. I mean it wont be that easy but a heck a lot easier then the traditional style.

[jackssmirkingrevenge]

My difficulty is that I'm not at all keen on working with oxygen, it's the giver of life and all that but nasty stuff when highly concentrated.