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my cloud bbmg is too weak

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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my cloud bbmg is too weak

Unread postAuthor: seeyouinhell2mf » Sat Apr 09, 2011 3:32 am

hey, I recently made a cloud and was satisfied with the R.O.F., however the power was just downright pathetic , the b.b.'s could probably fly about 15 feet before hitting the ground and that is from about 5feet9inches off of the ground, anyway, my point is that I want to ask , how would I go about increasing the power, I have been running at about 80 psi because I want to be safe, my p.v.c. is rated to 280, but I don't know if my p.v.c. cement can hold pressures like that, and I don't want to risk blowing out my clean-out plug, so, any ideas?here is a picture so you can see it, and if you need a better pic I can get it probably unless my camera takes a crap.Image[/img]
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Last edited by seeyouinhell2mf on Sat Apr 09, 2011 4:26 am, edited 1 time in total.
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Unread postAuthor: MRR » Sat Apr 09, 2011 3:59 am

You should definitely use a longer barrel. Does the ammo have a snug fit in the barrel? Too much blow by hurts performance as well.
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Unread postAuthor: Crna Legija » Sat Apr 09, 2011 4:11 am

If you are inputting 80psi you would be lucky to be getting 25psi in the chamber i would suggest 120 at least, a longer barrel(3x longer)tighter barrel and a dent at the breach will all help performance. If you put a longer barrel it slows the rof, like wise with a dent.
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Unread postAuthor: seeyouinhell2mf » Sat Apr 09, 2011 4:37 am

okay, thanks as it is 4:30 in the morning maybe I'l stop off a Lowe's later, the first time I went I forgot to take one of my airsoft B.B.'s so the ID of the tube was a guess, i would say that there is a half of a millimeter between the barrel and the projectile and when I chose my barrel I was thinking about the principal on which a gun works, however I figures 6-7 inches was long enough(except for certain things giggity) however I guess I'll get a longer one(where get), and , which part of this would you call a reach and what do yo mean a dent, by that do you mean a slight protrusion on the inner diameter of the barrel to allow for more force buildup before the release of the projectile?
P.S. I would also like to mention you people are much nicer than the nerfers, usually when you ask a question one of the smart-ass mods makes a rude comment and closes it because of all of the elitist people saying things like "G.T.F.O. nub" or making confusing explanations and when asked for a simplification they flip out
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Unread postAuthor: Crna Legija » Sat Apr 09, 2011 4:55 am

thats pretty loose id look for a tighter barrel, and yea go for about 2-3 feet of barrel. the dent yea you can just dint the barrel but its much better it you put a O-ring or something to make a air tight seal. you can sandwich a peace of rubber in between two fittings is a good way of doing it.
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Unread postAuthor: seeyouinhell2mf » Sat Apr 09, 2011 5:13 am

I'm sure my repeated quuestions are getitng old, but how would I go about putting that dent in my barrel?
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Unread postAuthor: shiny455 » Sat Apr 09, 2011 5:18 am

what do you mean by a dent at the breach
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Unread postAuthor: Labtecpower » Sat Apr 09, 2011 5:26 am

When you are very, very careful, you can place a nail at the beginning of the barrel, and hit it very gentle with a hammer. In this way you can make a very small dent, wich holds the BB to a higher pressure, giving more power.

The O-ring method is better, however.
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Unread postAuthor: Crna Legija » Sat Apr 09, 2011 8:23 am

there are a few ways of making a dent, you can it it with a hammer like Labtecpower said or cut a slit in the barrel and put a O-ring over it so that its in teh barrel a little bit, or the best way imo you can sandwich a peace of rubber in between two fittings. That way you can adjust the pressure required it pop the bb out.
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Unread postAuthor: seeyouinhell2mf » Sat Apr 09, 2011 12:49 pm

well, being a former nerfer i don't have any small o-rings so, I don't know what to do about the slit with an o-ring maybe I'll find a rubber band or something
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Unread postAuthor: Crna Legija » Sat Apr 09, 2011 1:13 pm

you could just buy some
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Unread postAuthor: Gun Freak » Sat Apr 09, 2011 1:13 pm

seeyouinhell2mf wrote:well, being a former nerfer i don't have any small o-rings

I don't see the relation there :?
You can use a similar detent like I used on my detent bb gun. It's easy to make.
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Last edited by Gun Freak on Sat Apr 09, 2011 1:46 pm, edited 1 time in total.
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Unread postAuthor: clemsonguy1125 » Sat Apr 09, 2011 1:27 pm

Gun Freak, most nerfers use larger orings on there plungers. And also nerfhq.com might be friendlier.
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Unread postAuthor: seeyouinhell2mf » Sat Apr 09, 2011 1:41 pm

clemsonguy1125 wrote:Gun Freak, most nerfs use larger orings on there plungers. And also nerfhq.com might be friendlier.

this guys right on the money

also, I am confused what you mean by use your detent, would you be referring to seating an inner barrel in my old one or am I missing the point on an off-note, holy crap that makes my daisy grizzly look like a little girly gun
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Last edited by seeyouinhell2mf on Sat Apr 09, 2011 1:50 pm, edited 2 times in total.
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Unread postAuthor: Gun Freak » Sat Apr 09, 2011 1:47 pm

lol that doesn't stop you from going out and buying one 25 cent o-ring.

A detent holds back the bb by creating an airtight seal until enough pressure is generated to force it through the detent and out the barrel.
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