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o-ring detent for BBMG

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o-ring detent for BBMG

Unread postAuthor: JDP12 » Thu Dec 23, 2010 7:34 pm

Hey all- want to make a o-ring detent for my unregged CO2 BBMG. only problem is, I can't really get 1/8" o-rings easily. So i was thinking of putting a hole in some rubber gasket sheeting and putting that in the gun to function as a detent, would that work? Thanks
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Unread postAuthor: saefroch » Thu Dec 23, 2010 8:22 pm

What I did to make an o-ring seal, probably like what you're trying to do is screw a bushing into either side of a union, with the o-ring and a spacer in the middle of the two bushings. You can polish the spacer and the bushing the o-ring is against to make it seal. So far I haven't had a problem.

I wouldn't use gasket material, but that's me.
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Unread postAuthor: JDP12 » Thu Dec 23, 2010 8:24 pm

By gasket i meant just rubber sheeting, but it might not work, which is why i'm asking. O-rings are just hard to find around me.
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Unread postAuthor: Vincenzo » Thu Dec 23, 2010 8:26 pm

Why don't you use POLAND's rubber washer sandwich method?
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more_eggs wrote:My teachers hated this one:
Teacher: "Matt, take your iPod out in class"
Me: "beg your pardon sir? I can't hear you, I'm listening to my iPod"
:P
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Unread postAuthor: JDP12 » Thu Dec 23, 2010 8:28 pm

Yea something like that, I tried to find the thread that discusses it, but couldn't, do you know the link?
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Unread postAuthor: Vincenzo » Thu Dec 23, 2010 8:38 pm

I don't believe there is. I think he just brought it up a few times in various threads. You can construct one using various methods... can you give me and idea of the sort of chamber you are planning and I can give you an idea for how to set one up? I awas actually looking into making one recently.
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more_eggs wrote:My teachers hated this one:
Teacher: "Matt, take your iPod out in class"
Me: "beg your pardon sir? I can't hear you, I'm listening to my iPod"
:P
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Unread postAuthor: JDP12 » Thu Dec 23, 2010 8:40 pm

Yea its just a BBMG, the detent assembly would go on the barrel right after the vortex block. I think I know how I'm going to do it now, could post a picture of it later... too lazy to now.
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Unread postAuthor: Vincenzo » Thu Dec 23, 2010 9:20 pm

I don't think you should use the detent on a vortex. A cloud would be better.
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more_eggs wrote:My teachers hated this one:
Teacher: "Matt, take your iPod out in class"
Me: "beg your pardon sir? I can't hear you, I'm listening to my iPod"
:P
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Unread postAuthor: JDP12 » Thu Dec 23, 2010 9:22 pm

no, that's not true. that doesn't matter, a detent functions in the barrel. as long as bb's get fed in, it works. The type of feed mechanism doesn't matter.

vortex's are generally better as they are more air efficient.
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Unread postAuthor: saefroch » Thu Dec 23, 2010 9:33 pm

There's a high-speed video somewhere on the site of a clear cloud firing, and the poor efficiency is very apparent.

*cough* JSR *cough* link *cough*
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Unread postAuthor: JDP12 » Thu Dec 23, 2010 9:34 pm

yea that's what I'm sayin.
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Unread postAuthor: ramses » Thu Dec 23, 2010 10:30 pm

saefroch wrote:There's a high-speed video somewhere on the site of a clear cloud firing, and the poor efficiency is very apparent.

*cough* JSR *cough* link *cough*


here.

maybe here


also, fine.
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POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
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Unread postAuthor: saefroch » Thu Dec 23, 2010 10:38 pm

Thanks!

For what it's worth, I did try searching first.
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Unread postAuthor: JDP12 » Thu Dec 23, 2010 11:08 pm

Yea, sort of the point of a detent is to make a BBMG more efficient, in terms of power/shot.
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Unread postAuthor: jackssmirkingrevenge » Fri Dec 24, 2010 12:37 am

ramses wrote:also, fine.


It's in the Wikitoo ;)

POLANS_SPUD's "valveless" launcher ishere.

As to to original question, yes it should work, provided the hole is cut well, I would recommend the sharpened tube method (without cutting your fingers ;))

The only problem is that it wouldn't be adjustable, unless you could take it apart, start with a small hole, and make it progressively larger until you get the desired pop-off pressure.
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