Hi Guys, Does anyone actually know what the minimum Pressure would be to prepel a paintball down a barrel leaving the barrel at 300FPS assuming there was a perfect paint to barrel match?
PSI required to prepel paintball
- Thread starter Hudson'
- Start date
Sadly...
Your question is missing a Variable...
Volume...
The more Volume of Air used, the less pressure needed to prepel it at 300 FPS
(there are one or two minor variables, but volume of air used is the biggie)
For example, take your average blowback marker..
in lamens terms..
Has practically no Air Volume inside the marker, so requires full 800 PSI coming through the bolt to fire it at 300 PSI.
Where as something like an Ion, has a much larger area for storing Air so it only requires 180 PSI
im not sure how else to explain it.. hope this helps..
Your question is missing a Variable...
Volume...
The more Volume of Air used, the less pressure needed to prepel it at 300 FPS
(there are one or two minor variables, but volume of air used is the biggie)
For example, take your average blowback marker..
in lamens terms..
Has practically no Air Volume inside the marker, so requires full 800 PSI coming through the bolt to fire it at 300 PSI.
Where as something like an Ion, has a much larger area for storing Air so it only requires 180 PSI
im not sure how else to explain it.. hope this helps..
Equinox has it. You could theoretically accelerate a ball to 300 fps using 1 psi if you had a large enough volume of air. In terms of practical application in paintball markers, low pressure = high volume, high pressure = low volume.
but surely in theroy there is a lowest limit, due to the amount of volume requiring more and more time as there is more and more volume meaning eventually the volume no longer affects the acceleration as the ball will be half way down the barrel. Just out of interest do you guys think it will be practical and possible to operate at 50psi?
All theoretical mind you, but it's stipulated that using a large enough dump chamber and a long enough barrel, you would be able to accelerat a ball to 300 fps with 1 psi. Was never proved really (even mathematically), but it's been said (and I took easy science classes through high school, so my skills aren't good enough to prove it myself, without assistance).50 psi is pretty low, you'd need a pretty massive volume of air, so even if you got a marker working on 50 psi, efficiency would likely be horrible.Slippy said:
That was another thing I was going to ask, why does everyone assume low operating pressure equals horrible effiency, surely low pressure or high pressure doesnt make any difference as it will require the exact same amount of air to prepel the ball, the same speed?
Well it would make a difference because with low pressure you'd need a massive volume of air to propell said paintball...
So basically to shoot ur ball at 300 fps from 50psi you'd need an air system the size of a nuclear submarine...
So basically to shoot ur ball at 300 fps from 50psi you'd need an air system the size of a nuclear submarine...
it doesn't take the same amount of air to fire it from different gats. it is how much air and what pressure that amount of air is being forced through the gun that changes it. so i high pressure gat uses less air as it is at a higher pressure so has more pressure to push the ball where as a low pressure gat uses more air at a lower pressure.
think of it of people pushing a car. if it's the exact same car you can either have lots of small, weak people pushing it or a few bigger, stronger people pushing it but if you get the numbers right they will be able to push that car at the same speed. e.g. 10 small guys can push a car the same speed that 5 big guys could.
so with that in mind you want to push the car using very very weak guys so you will need alot more of them but by theory you could do it, it would just be gas hungry as the same guys can't push the same cars so you need new ones and if you are using lots of weak ones then as you can see you are using more guys up faster than if you were using stronger ones
if you are trying to make the optimum gas efficient marker you want to be asking how much pressure you can hold in your gun without it being a hazord or seeing if you can change the design to hold higher pressures.
hope that helped
think of it of people pushing a car. if it's the exact same car you can either have lots of small, weak people pushing it or a few bigger, stronger people pushing it but if you get the numbers right they will be able to push that car at the same speed. e.g. 10 small guys can push a car the same speed that 5 big guys could.
so with that in mind you want to push the car using very very weak guys so you will need alot more of them but by theory you could do it, it would just be gas hungry as the same guys can't push the same cars so you need new ones and if you are using lots of weak ones then as you can see you are using more guys up faster than if you were using stronger ones
if you are trying to make the optimum gas efficient marker you want to be asking how much pressure you can hold in your gun without it being a hazord or seeing if you can change the design to hold higher pressures.
hope that helped
The amount of air you can use to propel the ball is limited, though, by the length of the barrel - specifically, the close-bore, unported section of the barrel. Which is about 6 inches in general. I think, from memory, this is technically possible on around 100psi or so, but it would require the "perfect" valve, which of course doesn't exist. There have been a couple of designs that operated down to 75-85psi, but they need a full 12" unported barrel to get the right velocity, and have tended to be unreliable and inconsistent.
The lowest practical pressure obtainable in the real world, with a normal barrel and consistent operation, is probably somewhere around 120-140psi. But there's no point striving for the lowest pressure possible because efficiency will be crap. There are many variables that determine overall efficiency, but in general the useful amount of energy carried by a given volume of air will peak at a certain pressure, which in the average paintball gun seems to be around the 300psi mark, give or take 100psi either way depending on other factors.
The lowest practical pressure obtainable in the real world, with a normal barrel and consistent operation, is probably somewhere around 120-140psi. But there's no point striving for the lowest pressure possible because efficiency will be crap. There are many variables that determine overall efficiency, but in general the useful amount of energy carried by a given volume of air will peak at a certain pressure, which in the average paintball gun seems to be around the 300psi mark, give or take 100psi either way depending on other factors.
Probs the best tuned older angel I've seen is an angel led, with an evolve kit- can go as low as 23psi. Very gentle on paint 
.
http://www.sabrepaintball.co.uk/forum/viewtopic.php?t=377
No BS, it's a right beastie.
.http://www.sabrepaintball.co.uk/forum/viewtopic.php?t=377
No BS, it's a right beastie
.