Well it's just the fluid dynamics theory. That's all. Show me the contrary proof that ram air can give positive pressure.
That has been done several times on this thread. You seem to have your brain locked on something and won't let it go.
Positive is defined as an increase.
If a container has 12 inches of vacuum and you raise the pressure to 3 inches of vacuum that is considered a positive increase in pressure. While still a vacuum, the pressure is higher than before.
You seem to be the only one fixated with pressures above barometric.
Again, great conversation (some notable exceptions however).
Sadly, the primary exception seems to be the OP.
