Pressure IS THE ENERGY that drives the pellet forward. Volume has a bearing on how well you maintain the pressure behind said pellet until as such time the volume gained between valve and pellet further down barrel becomes too much and pressure starts falling. Once the pressure behind said pellet falls away the acceleration rate stops and speed is pretty established.
This is why you will read and hear the term AMPLITUDE ....That being getting the highest pressure you can Behind the pellet Quickly as you can before it starts its travel down and out the barrel. Knowing the increase of volume that your attempting to keep pressurized is somewhat linear to the distance pellet travels from where it was, over dwelling valve makes no sense.
What a PEEK poppet brings to the table is a material that can have thinner sealing margins, releases its contact seal quicker due to low material compressablity. Outside of the that it is still the PRESSURE and how quickly and effectively it gets behind the pellet that SHOOTS / LAUNCHES it into motion and down the barrel. For most high power applications valve staying open much past when the pellet is 50% or less the barrel length is optimal with best efficiency less than that. * There is much more to this specific subject and the above % is just a reference # only or basic conversation.
Scott S
I have read tens of thousands of airgun articles and posts, and other than yours, I’ve yet to see the word amplitude used in relation to airgun poppet tuning, esp to describe the time required to fill the volume between firing valve and at rest pellet base.
Since amplitude has pretty much always been related to the half-wave height of vibration, versus wave length, which is peak to peak. I fail to see a need for neologism in this case, as it there is already much talk of amplitude regarding barrel vibrations and decibel levels of airguns.
Why I use that term ..... because of my extensive background in 2 stroke engines and tuned pipe dynamics where compressive or negative energy threw air and how timing of these pressure waves moving threw a mechanical devise can act. Where said AMPLITUDE and controlling / directing pressure pulses is key in happening at the correct time.
I could write a book on the subject, and being active for many years within other forums on the schooling of said principals of flow dynamics the "WORD" is very much relative in tuning a PCP valve / transfer / hammer system.
So LD, smart as you are, your education or that education of others in such matters where the term is not commonly used is unfortunate and a loss on there part of not having such knowledge ever presented to them in the context of Speed and Strength within specific time allowances within an Air rifle system.
I Know what i know and practice it. You do the same within your knowledge base and what you have read. Our backgrounds are very different but not so much we can't agree in life that we can keep learning something new every so often.
With that I'm done ...
Scott S
