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could someone please ggdt this for me.

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: jackssmirkingrevenge » Tue Oct 23, 2007 2:07 am

MrCrowley wrote:A damn good one obviously :wink:


Given the trajectory, you'd have to use one of these instead of a scope :D

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Unread postAuthor: Novacastrian » Tue Oct 23, 2007 2:15 am

Maybe that could be a new kick ass hop-up :lol:
You kill me JSR :lol: :lol:
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Unread postAuthor: ALIHISGREAT » Tue Oct 23, 2007 4:09 am

ok maybe 300ft may be hard but 200ft should be do able easily with a little hop-up, some one in the uksgc site said that if i cut my barrel at a 45degree angle then i would get a small amount of hop-up, i think he mean this way / but it could have been \ so what do you think, would it work?

and JSR that EBC thing says my gun will shoot 300ft flat... and the tool i found here http://arniesairsoft.co.uk/?filnavn=/articles/fps_limits/fps_calc.htm#range says that it should be shooting 405ft from 1m up before the bb hits the ground so i'm guessing on a still day that would in practice be ~350ft so i don't think 300ft is that un-realistic, although keeping the bb flying straight could be hard... so i might have to use a .22 rifle pellt or a plastic bag sabot.
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Unread postAuthor: Novacastrian » Tue Oct 23, 2007 4:32 am

ALIHISGREAT wrote:ok maybe 300ft may be hard but 200ft should be do able easily with a little hop-up, some one in the uksgc site said that if i cut my barrel at a 45degree angle then i would get a small amount of hop-up, i think he mean this way / but it could have been \ so what do you think, would it work?

and JSR that EBC thing says my gun will shoot 300ft flat... and the tool i found here http://arniesairsoft.co.uk/?filnavn=/articles/fps_limits/fps_calc.htm#range says that it should be shooting 405ft from 1m up before the bb hits the ground so i'm guessing on a still day that would in practice be ~350ft so i don't think 300ft is that un-realistic, although keeping the bb flying straight could be hard... so i might have to use a .22 rifle pellt or a plastic bag sabot.


Dunno, why not quiz your other online friends? :evil: traitor
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Unread postAuthor: ALIHISGREAT » Tue Oct 23, 2007 4:46 am

i was asking you becasuse :idea: .... you are more intelligent...
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Unread postAuthor: Novacastrian » Tue Oct 23, 2007 5:04 am

As you have admitted that we on spudfiles are more intelligent, i will admit that i don't really know if it will work or not, it could though.
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Unread postAuthor: dauphinoise potato » Tue Oct 23, 2007 5:13 am

ALIHISGREAT wrote:i was asking you becasuse :idea: .... you are more intelligent...




traitor :evil: How are you going to fit the barrel onto the qev? 'cause it isn't plumbing copper size is it?
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It's all a bunch of tree huggin' hippie crap!
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Unread postAuthor: jackssmirkingrevenge » Tue Oct 23, 2007 5:47 am

some one in the uksgc site said that if i cut my barrel at a 45degree angle then i would get a small amount of hop-up


HERESY!

:shock:

uniform barrel crowning is critical to accuracy

and JSR that EBC thing says my gun will shoot 300ft flat... and the tool i found here http://arniesairsoft.co.uk/?filnavn=/ar ... _calc.htm# range says that it should be shooting 405ft from 1m up before the bb hits the ground so i'm guessing on a still day that would in practice be ~350ft so i don't think 300ft is that un-realistic, although keeping the bb flying straight could be hard... so i might have to use a .22 rifle pellt or a plastic bag sabot
.

That calculator is flawed and massively optimistic since it assumes the BB does not decelerate at all, and with BBs air drag is a massive factor.

For example, a typical 0.5 gram 4.5mm air rifle pellet fired at 1000 feet per second will already slow down to 700 feet per second at 150 feet. An airsoft BB weighs less, and has a frontal area 1.8 times bigger, meaning it has a much worse drag co-efficient, so the drop is going to be much much more pronounced.
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Last edited by jackssmirkingrevenge on Tue Oct 23, 2007 5:57 am, edited 1 time in total.
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Unread postAuthor: Novacastrian » Tue Oct 23, 2007 5:50 am

Is this why muzzle brakes are so popular?
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Unread postAuthor: jackssmirkingrevenge » Tue Oct 23, 2007 6:04 am

Novacastrian wrote:Is this why muzzle brakes are so popular?


A muzzle brake is primarily useful at either reducing recoil by propelling the gasses rearwards towards the shooter, as well as reducing muzzle climb by directing the gasses upwards.

There are things called air strippers that uniformly remove the muzzle blast for accuracy reasons, that look something like this inside:

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Unread postAuthor: Novacastrian » Tue Oct 23, 2007 6:08 am

That's what i was thinking, removing the blast air. Thanks :D

Edit, i removed the silencer and porting from my mini only to find that the accuracy droped from say 10 to 4. i think that an air stripper would work (drill holes in barrel tip)
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Unread postAuthor: jackssmirkingrevenge » Tue Oct 23, 2007 6:29 am

A silencer is effectively cutting down on the muzzle blast so it works as an air stripper, as well as mitigating the recoil.
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Unread postAuthor: ALIHISGREAT » Tue Oct 23, 2007 8:03 am

[/quote]traitor :evil: How are you going to fit the barrel onto the qev? 'cause it isn't plumbing copper size is it?[/quote]

i am putting the 6mm barrel inside some 15mm copper and using barrel supports to keep it straight.
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Unread postAuthor: watto » Tue Oct 23, 2007 8:19 am

ammosmoke wrote:I dissagree

Your always disagreeing with stuff, maybe you should invest in learning to spell it.

jackssmirkingrevenge wrote:Have you ever tried shooting at a target beyond the length of your bedroom?

bahahah, ice cold baby, ice cold :lol::lol::lol:
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Unread postAuthor: ALIHISGREAT » Tue Oct 23, 2007 9:24 am

who was that directed at? i shoot at school, mostly .22 rifles.
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