[Logic]

Originally Posted by aerohead

let's see if this works
http://https://ecomodder.com/forum/s...ille-7838.html
Didn't work!
A search for 'lamellar self-blocking grille' located it

A reed valve is a pressure difference driven valve that closes completely aerohead, not an aerodynamic impediment to reverse flow. (what you trying to stop)

https://youtu.be/FohhtYJpQ7Q?t=73

If you want an aerodynamic impediment to reverse flow, look up the Tesla Valve and exhaust anti reversion.