What determines fill pressure, and reg setting???????

"So just like the title says, what determines these? does changing the reg out to say a huma raise the ability to increase reg pressure?"

No - you can adjust the std reg just fine. Huma may be better - or not

"Does a different bottle mean more air?? "

Yes - if you get a larger bottle, 250 bar is pretty std tho

"I have a Crown MKII and it fills to 250 bar, and 160 on the reg. Is there anyway to increase these????"

Maybe - but check the manual, FX may tell you that it is already at its max.
 
Think of pressure as flow,think of the regulator as a flow meter that channels the flow of air.

Think of a bigger bottle as a holding tank,bigger bottle more air to flow .

Regardless, the regulator still flows the same amount of air through it...The regulator can be adjusted for more or less air flow.

Bigger bottle more shots because there is more air available to flow...regulate.

The "Thing" is to Balance what you want to achieve.

There are better examples and explanations ..Others will expand on it .


 
Does changing the reg out to say a huma raise the ability to increase reg pressure?

Yes, the Huma regs come in different pressure ratings and it can make, depending on the one you choose, a big difference in the power output of your gun as well as shot count.



What determines fill pressure, and reg setting

I would have to say that your FPE, accuracy and shot count should dictate your fill pressure and reg pressure as that is what you are after.

Adjust the regulated guns to get the FPE, shot count and accuracy you want.

Adjust the fill pressure on an unregulated gun to get the best FPE, accuracy or shot count whichever you prefer or a good average between the two.



Does a different bottle mean more air?

Yes, a larger bottle means more air so more shots not more FPE/power.



I have a Crown MKII and it fills to 250 bar, and 160 on the reg. Is there anyway to increase these?

Without changes and machining to your gun you cannot raise the 250bar tank to a higher rated tank such as the M3s newest 300bar unit. Although aftermarket vendors may come up with one of these someday.

Yes, Huma has a 145-190 Bar regulator that would allow you to up your guns pressure and therefor gain power.





 
Yes, I believe Huma sells an high power (HP) version in some models for higher setpoints.

A bigger bottle means more air volume, thus more shots for a given tune.

250 bar is the max fill pressure rating for the Crown. When filling above this max rating, you'll be on your own and is unwise, IMHO.

Each gun has a sweet spot and range where it will perform at its best in many categories. Going outside of its range reduces its performance in many categories.
 
I have been wondering myself, with 300 BAR carbon tanks on the market, would i be able to drop one of those on say my 250 bar FX Maverick, or would that just be too much work for the 2 regulators, which i assume at least in regard to a MAX pressure must be tailored to handle that.

I would of course not fill any tank to more than its rating,,,,, even if say my new 12 L carbon fiber tank which is 300 bar but it is tested to 525 BAR as i recall.

But you can replace the tank with something that can handle a higher pressure, but i have no idea if that is a good idea VS the dimensions of the rest of the gun.

I would assume a 250 BAR gun like my Maverick would also be able to handle a 250 BAR "reg / plenum " pressure, if you have completely lost your mind.
 
Not "what", but..."who"...determines the both the fill pressure and secondly the regulator setting.

The fill pressure is determined by the design criteria as laid out by the Engineer/Designer. The cylinder design, e.g. aluminum tube vs. aluminum cylinder vs. carbon fiber cylinder. Each one of these items can be designed in various pressure ratings. Material used, material thickness used. In using the "tube" design, the same thing. Material used, end cap material AND dimensional design and the thickness of the tube. Even the carbon fiber cylinder has different designs (pressures) possible.

Just like an airplane. As the plane increases in altitude, two things happen, the outside air gets thinner AND the cabin has its pressure increased so we humans can continue to live. What happens to the planes fuselage (body), it expands. It gets larger in diameter, and to a lesser degree, it grows in length. The air guns air"cylinder" (all designs) do the same thing. With internal pressure, they grow in size, but to a lesser degree than the airplane. The designer needs to know what the given pressure will do to what material, thickness of material, heat treat of the material. Ductility or malleability would be the key word here. The ability for the material to "move" is much better than a tougher material that is more brittle and will not grow as much. Some of this actually can come down to...yeah...overall cost.

The o-ring material and quantity also has a place in the maximum designed pressure. The material, placement and even the groove design to a lesser degree.

So "WHO" determines the cylinder fill pressure - the lead Engineer. "Who" determines the regulator settings ? That's more of an industry thing these days. "Adjustability" seems to have taken over the "set", or non-adjustable pressure. And who determines the adjustability, seems that the pellet and slug design does that, accuracy wise.

Hope that helps some.

Mike
 
I have been wondering myself, with 300 BAR carbon tanks on the market, would i be able to drop one of those on say my 250 bar FX Maverick, or would that just be too much work for the 2 regulators, which i assume at least in regard to a MAX pressure must be tailored to handle that.

I would of course not fill any tank to more than its rating,,,,, even if say my new 12 L carbon fiber tank which is 300 bar but it is tested to 525 BAR as i recall.

But you can replace the tank with something that can handle a higher pressure, but i have no idea if that is a good idea VS the dimensions of the rest of the gun.

I would assume a 250 BAR gun like my Maverick would also be able to handle a 250 BAR "reg / plenum " pressure, if you have completely lost your mind.

https://www.airgunnation.com/topic/93-shots-at-85-fpe/?referrer=1