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Forums › Marker Talk › Problem/Tech forum :: Archives › possible cause for "blowback effect"? :: Archived

possible cause for "blowback effect"?
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Leterrip
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PostPosted: Thu Jul 01, 2004 10:31 pm    Post subject: possible cause for "blowback effect"?

i was fiddling with my gun one day and i noticed that when i put two balls in the feed neck and shined a light down the front of the breech i could see that the second ball protruded very very slightly into the top tube. i know this wouldn't cause a chop but what i'm thinking is that the bolt might push the second ball up a little when it fires causing a blowback effect. what do you think about this?
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Madpooh
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PostPosted: Fri Jul 02, 2004 9:17 am    Post subject:

get vapor bolt Wink

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John2
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PostPosted: Fri Jul 02, 2004 11:24 am    Post subject:

How would the ball going 1/10th of an inch cause blowback? blowback is with air pushing balls up, not balls barely pushing balls up. A fix for it would be bigger balls.
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Leterrip
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PostPosted: Fri Jul 02, 2004 11:49 am    Post subject:

first of all, i have a vaporbolt and i don't think that relates to what i'm talking about at all....

second, i don't mean actual blowback, just the effect of it (the balls jumping up the feedneck). not due to air but the slight amount of the ball above the one in the breech being exposed to the bolt when firing.

i don't really have problems with it but i just thought it might cause that EFFECT (not actual blowback from air)
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soap_shoes
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PostPosted: Fri Jul 02, 2004 12:52 pm    Post subject:

ahhhhh so you mean 'ball bounce'

haha

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Leterrip
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PostPosted: Fri Jul 02, 2004 1:24 pm    Post subject:

yeah... i guess Rolling Eyes
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John2
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PostPosted: Fri Jul 02, 2004 3:01 pm    Post subject:

Hmm good thinking tho, it might be the cause of some blowback-ness. Why don't you just try it and find out if it really moves up Smile (not meant sarcastic if it seems like that)
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polemos
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PostPosted: Fri Jul 02, 2004 7:08 pm    Post subject: Re: possible cause for "blowback effect"?

Leterrip wrote:
i was fiddling with my gun one day and i noticed that when i put two balls in the feed neck and shined a light down the front of the breech i could see that the second ball protruded very very slightly into the top tube. i know this wouldn't cause a chop but what i'm thinking is that the bolt might push the second ball up a little when it fires causing a blowback effect. what do you think about this?

Blowback can be caused by a number of things, normally it can be traced to lpr/hpr pressure being too high or out of whack. Sometimes the valve can get misalined, or airflow is restricted in another way.

Check and see if your blot is causing bounce with 3 balls in the feedneck and no hopper on.
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Leterrip
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PostPosted: Fri Jul 02, 2004 8:32 pm    Post subject:

Quote::

Check and see if your blot is causing bounce with 3 balls in the feedneck and no hopper on.

....will do
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IronCore
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PostPosted: Sat Jul 10, 2004 8:05 pm    Post subject:

I think that is why they made those powerfeed systems before. Im looking at putting a spare triangular bumper from level 10 and to make it stick out a tad and minimize them (I think they call them ball feed offset). Anyways I think once your firing 10bps or more the ball might not have enough time to go back as you have described since it just have enough time to drop in and fired (the first one is always an offset feed), that is just my thinking though and Im always wrong anyways Wink

edit: Add: That didn't go well, the bumper flew outta there at first shot-bummer, I even used that plastic epoxy glue and I was so sure that it bonded very well with the bolt. Sad

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Last edited by IronCore on Wed Jul 14, 2004 10:57 am; edited 1 time in total
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