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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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Pump-action reload

Unread postAuthor: flamerz14 » Fri Jun 01, 2007 1:46 am

I was wondering if it is possible to have a pump-action reload like a shotgun in a spudgun cos it will look VERY cool.So far on this websites I have onl seen bolt-action and break-off reloads.And also, can anybody tell me why a shogun slug'sabot does not fly out of the barrell after it is shot, and why must a spudgun's sabot shoot out with the ammo?

Help much appreciated.
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Unread postAuthor: chaos » Fri Jun 01, 2007 1:52 am

shotguns sabots do come out with the ammo

Image

and im sure with positive and creative thinking a pump action would be possible.
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Unread postAuthor: Solar » Fri Jun 01, 2007 2:12 am

It all comes down to the ammo. It has to be able to work with the action of your launcher.
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Unread postAuthor: jackssmirkingrevenge » Fri Jun 01, 2007 3:10 am

very simple to achieve the feed, the complicated bit is getting a semi-auto valve.
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Unread postAuthor: deathholm » Fri Jun 01, 2007 3:21 am

jackssmirkingrevenge wrote:very simple to achieve the feed, the complicated bit is getting a semi-auto valve.


Wouldn't a simple solenoid valve work? :?
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Unread postAuthor: jackssmirkingrevenge » Fri Jun 01, 2007 3:42 am

deathholm wrote:Wouldn't a simple solenoid valve work? :?


If it reseals quick enough, I suppose.
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Unread postAuthor: flamerz14 » Fri Jun 01, 2007 4:00 am

The sleeve is suposed to be connected to the pump right? how can ypu do that wothout blocking the barrell?
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Unread postAuthor: jackssmirkingrevenge » Fri Jun 01, 2007 4:25 am

flamerz14 wrote:how can ypu do that wothout blocking the barrell?


What do mean blocking the barrel?
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Unread postAuthor: flamerz14 » Fri Jun 01, 2007 4:33 am

The connecting rod has totouch the bottom of the sleeve to let the ammo in , right? if you place a bar to connect them you most likely have to place in in through the barrell.
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Unread postAuthor: jackssmirkingrevenge » Fri Jun 01, 2007 4:42 am

dude... seriously.

the diagram is a cross section, this is what the sleeve looks like in 3D

(excuse the crap diagram, i'm at work and busy hehe)
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Unread postAuthor: jrrdw » Fri Jun 01, 2007 6:06 am

Take apart a pump shotgun and study, all that i've seen have connecting rods are on the outside of the ammo tube, then slide into the receiver to work the gun. This is a sweat idea, i really like it!!!
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Unread postAuthor: jackssmirkingrevenge » Fri Jun 01, 2007 6:36 am

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


planning on doing a lot of pumping then :roll: :D :D :D
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Unread postAuthor: singularity » Fri Jun 01, 2007 3:26 pm

why not just pt the pump on the barrel pipe. use a pipe with an ID slightly larger than that barrel's OD cut a hole near the back of it it to allow the to go through and put a spring behind it. i think it would make it simpler, unless of course your going for the authentic shotgun look.

something like this....

<img src="http://i78.photobucket.com/albums/j85/irwinner_2006/pumpaction.jpg">
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upcoming projects... finalized clip fed BBMG and ball point pen sniper
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Unread postAuthor: CS » Fri Jun 01, 2007 3:50 pm

Here is my idea for spherical ammo, specifically golf balls. One of the obvious design differences is no holes in the barrel itself. I don't know if it even effects the performance that much, but that is why I made a different design to confront it.

<img src="http://www.spudfiles.com/uploader/uploadFiles/018.PNG">

2" Tee
2" Schedule 80
2" Schedule 80, glued to barrel acting as a grip
1.5" Schedule 40 acting as a stop (pretend this is light green)
1.5" SDR-21 (Class 200)

[I dicked up on the second part of the diagram. That being the lower portion of the barrel. Please ignore.]
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Unread postAuthor: iknowmy3tables » Fri Jun 01, 2007 4:06 pm

flamerz14 wrote:The sleeve is suposed to be connected to the pump right? how can ypu do that wothout blocking the barrell?

ROFL, gee what do you think sleeve means, well pump action is very easy just think

oh yeh the barel has to lock if its in a barrel bolt system, you have to use a (realistic) forward locking bolt that's separate from the barrel or else the barrel/bolt will fly forward/open
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