RVA help. A-5

An rva has nothing to do with the air in take all it does it tighten up the spring. you should beable to just put it on and thats it. to know how far to adjust the velosity screw you basically just need to crono it and adjust you will most likely have to the velosity screw in which will lessen the air intake.

Cant wait to see the gun

put stock screw all the way in... to save air...

^^ don't be a retard... the velocity screw retricts air, thus making the ball go further... the RVA tightens/loosens the back spring, thus making it shoot further/less because of the tenstion on the spring, thus making the velocity screw all the way out a waste of air, cause if its all the way in, it saves air, yet shoots same speed/distance because of the RVA tighening/loosining the spring...

Wow. that was horribly incorrect. The velocity restricts the air flow.  that does not make the ball go farther- try screwing the screw all the way in and see what happens. The velocity is reduced (in your words "lessed") and the ball does not travel as far. When the screw is out, it allows the air to flow through faster, thus increasing ("plusing") the velocity, which increases the distance the ball can travel.

It's simple. Air flows similar to water, so go into your bathroom for an experiment. Now, go to your lavatory (sorry, "sink") and open the drain all the way. Now turn on the faucet all the way. Now turn it off. Now, provided your drain isn't blocked, the water should go away fast. Now, almost close the drain all the way, but leave a small crack. Now, turn the faucet on and off just like you did before. And whoa- the water drains slower. Crazy, isn't it?

Now, the Rear Velocity Adjuster changes the tension on the spring. Well, here's what that springy thingy does- The main spring pushes the rear bolt forward, and when the rear bolt strikes the pin on the CVX valve, it opens the valve and causes the air to flow. This air is then divided into two possible directions- most of it goes out the front of the gun, thus propelling the ball out the barrel. The remainder of this pushes back on the rear bolt and main spring, causing it to move back towards the rear of the gun where the sear catches it, where it waits for you to pull the trigger again. This is called a CYCLE. Now, the RVA can change the tension so you only release the air you need to propel the ball forward at the desired velocity. The tension on the spring will change how much force the spring exerts (puts out). You increase the tension, it exerts more force (punches harder). You reduce the tension, it exerts less force (punches lighter). Now, the force it exerts meets the valve spring. The valve spring will first bounce forward from the blow, and then retaliate (valve gets hit, steps back, then punches the other guy in the face that hit him) to close the valve. Now, if you hit it harder than the standard tension it will move forward farther and retaliate slower, causing more air to release. If you hit it with less force, it will not bounce forward as far as the standard tension and close faster, thus releasing less air. You want to use less air, so you reduce tension in the main spring.

The velocity screw only slows down the air, the same amount still gets released. Just like the sink trick- if you were to put equal amounts of water in two cups and use a stopwatch to time the difference between having the drain all the way opened and almost closed, you'll see having the drain almost closed takes longer, but it's still the SAME amount of water.

I've noticed you go through and make small commenst about everything on the first page of almost every forum- half the time you don't read what is going on with other posts, and usually your responses are "Yeah, what he said." or "I like paintball." or "Yay! i like those too!" Please don't post crap just to get your post count looking "cool" (post count...cool?  hehe). It really annoys me, and doesn't help the guy TRYING TO GET REAL HELP. You're trying to argue against a guy who passed Physics with an A and actually paid attention. Plus, you're using some really half-baked strange alien lopgic that doesn't apply to our world or our definition of physics. Blocking air flow makes it go faster? Using more air reduces the velocity? Wow, go back to class.

*edit*
B_wet A-5, hey no problem. Ask anytime. I'm usually in the MaintenaNce and Technical Help Forum.

Edited by LordJovian

^maybe you should lose your gold star..

^^ I disagree... after I bought my RVA, I went to the
hardware store and found a grub screw "aka front
velocity screw" half the size to replace the stock grub
screw. Now when I screw it in to be flush with the
outside of the power tube, it does not block any air
traveling to the paintball. I use my stab and rva to
adjust the air flow and it works fine.

little off topic aren't we?

 

ItalianoGuy04,

What’s with your attitude? LordJovian is on the money with his technical explanation.

I think there is a missing element in this discussion on how the FVA effects the entire system. Technically Lord Jovian your sink inlistration is flawed in the fact that water is not compressable and air/nitro/CO2 gas is, so the FVA is not going to act like a sink.

I would like to explain what is going on with the FVA and how it works. I functions by restricting flow down the power tube and indoing so creating back pressure in the valving area. This back pressure effects the rear bolt and its travel. More pressure=less valve depression/less travel. This is the primary mode of operation of the FVA. Think of it this way, what kind of efficiency do you get "dry firing" your marker as opposed to shooting with paint (mine drops to about half) this is due to almost no back pressure in the valving area which allows the rear bolt to travel much further forward than normal. Which causes a far greater amount of gas to be exhausted.

The FVA does effect gas consumption, and it has to do with the back pressure as stated above. There are actually two primary reasons for this, the first was covered in the above paragraph, the second is due to the fact that as the pressure in the valving area increase the pressure differential drops. Air flow (the amount of a gas passed for a given time is directly related to the differntial in pressure, the high pressure traveling it the low pressure area, less differential less gas transfer.

A lot of the above discussion does "work" as far as the RVA is concerned. the theory was just a bit flawed.

I do agree with one fact.... ItalianoGuy04

needs to stop giving his two cents worth, it isn't worht even that.

Bazz wrote: just take the gun point it at you leg and shoot that will fix it!!!

You want to stop wasting space on the forum. That was a useless post.