Luke31 wrote: ↑Tue May 11, 2021 12:56 pm
Could someone explain the valve settings? My air cannon uses a 1'' ball valve, but I don't see any options in the settings for that.
For a ball valve, select "generic valve"
Leave the flow coefficient at 45%
Seat diameter would be 1 inch
You'll have to estimate the opening time depending on how you're opening the valve.
Dwell time is 999 if the valve stays open.
Dead volume is the total space between the base of the projectile at rest and the valve opening.
How am I supposed to know the friction psi of my projectile. Anyway to test that?
Put the projectile in the barrel and try and blow it out. If it moves then friction is less than 3 psi
Is psig the same as psi? Is it safe to assume 100 psi would equal 100 psig?
psig means psi gauge, ignoring atmospheric pressure.
For example if your gauge reads 100 psi, then it is 100 psi relative to the atmosphere but the actual pressure is 115 psi.
For practical purposes that extra 15 psi is "cancelled out" by the atmosphere.
