Recent content by purplepom

That's pretty funny 🤣 🤣 🤣. I think where I'm going with this is, those extra shots people are observing is coming from compounding small gains that the ideal gas law and other linear approximations count as "negligible"

I think for the ideal gas approximation it's, Pfinal = pinitial * (vplenum / (vplenum + vbarrel)) So those are correct But deltaP between the two examples is 1.35 PSI So percentage difference is (deltaP / Pinitial) * 100 = 0.045%. so two orders of magnitude off, but remember that's per shot...

Nah man don't apologize, I love this conversation. I'm new here only reason I know this is cause my wife is a chemical engineer and I had the same exact conversation with her. But anyway big tldr here is 1% more air translates to 1% more shots. Just from that property. Obviously people on this...

Unfortunately screenshots and scale are bad, but ran the numbers, making some assumptions like the air is at room temp. It comes out to 3000psi 150cc - 1.09mols 300cc - 2.20mols Just to outline here is 4000psi 150cc - 1.39mols 300cc - 2.8 mols These are obviously under certain assumptions...

Wrong! Doubling the tank volume at the same pressure does not exactly double the amount of air if you take the compressibility of air into account. The relationship depends on how closely the air behaves like an ideal gas versus a real gas under the given conditions. Here's a detailed...

I'm actually getting the porting done now. Btw is that a 700 mm barrel on your Notos? If so I can you DM me where I can get one?

So just an FYI, this is a non linear problem. If you've taken a differential equations you can relate this to a tank mixing problem. The other thing to remember is you are dealing with a compress able fluid. Not water. When you up the pressure of air, the amount of air does not scale linearly...

Hi all, Quick question, any body have any experience with modifying the return spring on the umarex Notos poppet valve? Im trying to maximize volume of air (extended barrel) to push some slugs hard. Any suggestions on a good replacement spring? If I have to take material off the spring how...