right, the air would get hot, but wouldn't there be some sort of diffusion as well? very rarely is the air dead still--always a slight breeze. also i would venture to guess that air pressure in the cabin would be higher than ambient: open the door after the car sits for a while baking, you will be greeted with a blast of hot air rushing out. all that, at least to me, suggest that there should be some natural convective current, but there isn't apparently, given all the hot car cabins i get into /ubbthreads/images/graemlins/smile.gif
at the bottom of my logic (or illogic?) is the idea that cracking the window a bit or using the vent on the sunroof will make a difference as to how hot the cabin gets: but why? the aircon plumbing also connects outside air to the cabin. why doen't that play in, when a cracked down window does.
and no worries about pets, i have none. thankfully the aircon is a goodly powerful unit, and car has HSEA glass all around, so any passengers, should they wish to stay in the car for any reason when i step out, run the a/c and crank the cd /ubbthreads/images/graemlins/smile.gif