BrianRT wrote: I was driving around and had a digital pressure manometer laying in the passenger seat . . .
I'm not gonna ask. But part of me finds that statement somehow disturbing.
BrianRT wrote: 50mph = 3.7-4.2 cm H20
Doubt I could get my Corolla up to 100 mph on the BQE and still live to tell the tale. But if I ever find myself in an ambulance and having a hard time breathing, I should ask the EMT boys just to stick my head out the window, turn on the lights and siren, and floor that baby. (Oh, wait, I live in NYC--breathing unfiltered air here is unhealthy enough at 0 cm! So maybe not.)
Thanks BrianRT. Very interesting.
With all the air rushing into the face, no problem with mouth leaks and lip flutters, cause it would all be in the opposite direction! And for bilevel action, one could simply turn one's head forward then backward every few seconds, right?!
jeff