Where to find information on pressure drop in air flow systems

[Bern]

Can anyone suggest a site where I can get a crash course in air flow? What I am looking for is pressure drop verses various volumes, speed, duct size, shape, etc. I have spent over an hour searching the net, but haven't had any luck. Thanks.

 

[russ_watters]

You mean HVAC - airflow through ducts? Try this: http://members.optushome.com.au/aerial1/