Tony, I'll just do the minimal desription here. Air has mass, and air going into an engine is doing so with some velocity. The "problem" here isn't the air, it is the way the air is controlled going into your particular ICE. When the valve or port in the case of the rotary opens the air rushes into the housing, or cylinder in a piston engine. When the port closes the air bounces off the rotor and back up the tube. Tuning is the act of trying to control the bounce, and improve the inrush of air. The subject can be made incredibly complex if you try to control every variable. The reality is that most set-up that aren't super bad will run. What we are talking about is improving the performance and therefore increasing the power and reduceing the amount of fuel needed to achieve that performance. Driveability is another factor, but less so for aircraft.
This may be a silly question but, (here goes) How does the air know?
how does the air know the length of the intake( runners) tubes versus the lenth
of say a plenum? What if I have a really long plenum that acts like a long
tube. how does the air know when it has reached an intake tube or port.
Do you understand what I'm trying to ask? air is air !
Is it all just a preasure game with these intakes?
How many different types of preasure are there?
I get the length part of it. I guess where I'm confused is the difference
between a plenum and an intake runner, can a plenum act as an intake runner?
Tony
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