The poppet valve is round so its area is not 1/4 sq inch. The area of a circle is:

So the head of the poppet valve would have an area of .0625".  (.25 X .25 = .0625 sq in.)

.0625 sq in X 500 psi = 32.25 pounds of force to depress the pin.

Stick, this is Middle School math.

     WAIT A MINUTE!  See this is where I went wrong!

     500 x 0.25 x 0.25 = 31.25 is what I did initially, but what about pi?

     500 x 3.14 x 0.25 x 0.25 = 98.125 is when I inputted pi.

     Two other sources did give me your answer Bruce A. Frank (about 10 others had no clue or vague guesses) so I want to believe you.  But why did I multiply the squared radius by pi to find the area of the circle when you didn't?!

     You're right cmts58, it's too darn late for this stuff...

...

This thread is too intelligent for 98.9% of this forum. Good luck with that.

Once you figure out the area of the circles involved , you enter into physics , Ie: Mass , velocity , Kinetic energy and such .

The rear hammer is propelled forward by the mainspring when the trigger is pulled (factor in friction , strength of mainspring , mass of rear bolt , and the impact energy when it strikes the CVX valve ) .

Oppossing this is the pressure behind the CVX valve poppet , the spring force on the poppet valve .

The main factors that are easy enough to control are with the rear bolt , its velocity (either by changing the mainspring , or reducing the friction associated with movement of the rear bolt , and sometimes the equivalent mass of the rear bolt) .

Kinetic energy stored in the mainspring is transferred to the valve through the rear bolt . With a straight mechanical set-up , the laws of physics dictate the amount of time and degree of being fully opened for the CVX valve . Simple hydraulic principles apply . For an example a 1" control valve supplying supplying 100 PSI to a 10" Cylinder will enable the 10" cylinder to lift approximately 1800 pounds , this doesnt sound correct until you figure the areas involved , but do the math , I did it real quick off the top of my head , but it should be close .

I dont know any of the formulas , but with a well based understanding of the principals involved , the exact formulae arent required (unless you are a fluid mechanics engineer) .

If you desire to change any of the characteristics of timing of the CVX valve , it cant feasibly be done without electronics , then you can mess with parameters such as dwell , and that would require an entirely different configuration of gas management (Bye-Bye CVX valve ! , Hello Solenoid ! ) .

Hope this points you in the right direction .

Apparently middle school math is beyond me. I was so intent on one part I DID forget about pi. Trying to get this stuff on the screen diverts my attention.

It should by .0625 X p  = .19625

Then 500 X .19625 = 98.125  pounds

Monk ,,, thats the Mass , Velocity and Impact energy components of the mix . The math is WAY out of my league .

What Tallen said is very true , I cant venture to hazard a guess about the things which he speaks of for I have no experience with solenoids or servos as they relate to paintball in any relevant manner .

However,,, I can think of a solenoid/Cam configuration that would be able to control dwell on a CVX valve , but it would need to be totally custom built .

tallen702 wrote: Yeah, but virtually any new technique or breakthrough always is my friend! I've got a new valve system I've been wanting to work on that completely removes the need for a valve chamber to build up volume. Obviously the marker wouldn't be able to run at ultra low pressures due to the configuration (no build up space) and a high-flow reg would be needed, but I'm working on that as well Solenoid actuated, but there are only two moving parts in the whole marker and they move exactly .72" only.

If you are not pressing directly against air pressure as a poppet valve does the concept is easy to impliment. There are mechanical rotary valves I have bought that require virtually no actuation pressure to release thousands of pounds of gas pressure...all mecanical. THe valves weren't inexpensive, but were in the $25 range 12 years ago.

Quarter inch ID line with dual Palmer Stabilizers gave me more than enough flow for a similar idea I tried a couple of years ago.

     No need for me to worry about the hammer, drive spring, mass, etc. because I don't plan on using any.

     I hate electronic markers and the length of the mechanical Model 98, so I'm going to attempt to make it pneumatic (or pneumatic/mechanical if I need some leverage ).  Fear not, for it will still be a Tippmann at heart!  Just some changes to the M98's aesthetics and how the valve's airflow is triggered, actuated and discharged.  If all goes right, I'll have the "Speedball" Tippmann people want, and I'll post my project/results initially at Model98.org.

     I'll have to look into rotary valves, even if just for the knowledge.  I appreciate everyone's help and input, thank you.  I'll see you around and keep you informed in the months to come!