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Pump-action reload

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: flamerz14 » Fri Jun 01, 2007 8:40 pm

singularity's idea is pretty much simple.anyway, I've designed a magazine that has a spring inide it on the end so that it can be used horizontally, like a shotgun's mag.
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Unread postAuthor: jrrdw » Sat Jun 02, 2007 6:45 am

jackssmirkingrevenge wrote:
jrrdw wrote: This is a sweat idea, i really like it!!!


planning on doing a lot of pumping then :roll: :D :D :D


WTF?
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Unread postAuthor: jackssmirkingrevenge » Fri Aug 10, 2007 3:23 am

Now that I have a working self-contained cartridge to hand, thought I'd take a look at how pump-action shotguns work.

Take a look at the flash animation

A tad too complex for my liking. It would be much easier to make a stack magazine as opposed to a tubular one, but in my book pump action+stack mag is an aberration. The break-open option is looking a bit more appealing...
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Unread postAuthor: spud yeti » Fri Aug 10, 2007 3:45 am

jrrdw wrote:
jackssmirkingrevenge wrote:
jrrdw wrote: This is a sweat idea, i really like it!!!


planning on doing a lot of pumping then :roll: :D :D :D


WTF?


You spelt sweet "sweat" so he was reffering to you sweating when pumping the gun. Just a joke :wink:

The idea of pump action is cool because its quite a simple design to get working.
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Unread postAuthor: jackssmirkingrevenge » Fri Aug 10, 2007 3:48 am

spud yeti wrote:The idea of pump action is cool because its quite a simple design to get working.


Not the way real pump action shotguns work tho :shock:
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Unread postAuthor: spud yeti » Fri Aug 10, 2007 3:55 am

Ja, thats very true, I just watched the animation, holy wack :?
But its an easily simplified concept. I wonder why they make it so complex?
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Unread postAuthor: jackssmirkingrevenge » Fri Aug 10, 2007 3:59 am

spud yeti wrote:But its an easily simplified concept. I wonder why they make it so complex?


Manufacturers have no interest in overcomplicating things that would make their products more difficult, expensive and time-consuming to manufacture and maintain. Since the pump action mechanism has been around for over a century, I think it's safe to conclude that it's as simple as it can get.
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Unread postAuthor: spud yeti » Fri Aug 10, 2007 4:06 am

I guess they had to find a place that is in between simplicity, effectiveness, cost and reliability.
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Unread postAuthor: noname » Fri Aug 10, 2007 12:19 pm

Or you could go to the How-To section and find a really good animation of a pump action design that would be easy to construct with the right pipe sizes (say, 1/2" Sch 40, 1/2" SDR 13.5, 1" Sch 80, 1" SDR 21).
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Unread postAuthor: spud yeti » Fri Aug 10, 2007 12:30 pm

I went to the how-to page, to supply this thread with the link, and can officially say I couldnt find it; please prove me wrong :wink:
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Unread postAuthor: noname » Fri Aug 10, 2007 3:54 pm

It was there 9 months ago, it should be there now. Hmm, it might have been in the Theories... I'll look through both. Eh, can't find it in How-To's, I'll check the Theories later.
http://www.spudfiles.com/official_pics/ ... r3_med.mov
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Unread postAuthor: PinHead » Fri Aug 10, 2007 4:25 pm

I think it all comes down to how you want to load your cartridges; most people assume that with a pump action, you either have them lined up on top of each other, like in a magazine or clip, or lined up in a row, like a tube loader.

The animation above looks like a very good concept. The only problem I see is making sure that the cartridge is actually going to fall thru the port that it needs to every single time, without getting caught up somewhere or needing assistance to get pushed down. I don't know if gravity would be enough by itself.

Currently, I've been tinkering with a design for a pump-action, 6-shot revolver. If I get some better drawings made, I'll show them here.
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Unread postAuthor: jackssmirkingrevenge » Sat Aug 11, 2007 4:05 am

PinHead wrote:Currently, I've been tinkering with a design for a pump-action, 6-shot revolver. If I get some better drawings made, I'll show them here.


Image

That's a sweet idea, you got me thinking :D
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Unread postAuthor: PinHead » Sat Aug 11, 2007 5:39 am

That's a bit different than what I had in mind, but still really friggen cool. What is it exactly... I want some more info! I don't really care if someone already beat me to it.

EDIT: Ok, I just googled the site that image came from - apparently it's a bullpup 410. That thing really got me thinking now, too; I never thought of putting the cylinder behind the trigger setup.
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Unread postAuthor: jackssmirkingrevenge » Sat Aug 11, 2007 5:58 am

As far as I know it's a custom one-off, based on the Jackhammer shotgun, but substituting semi-auto recoil operation with manual pump-action.
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