Lot of good stuff in
http://www.cafefoundation.org/aprs/localflow1.pdf
too.

Richard Lamb wrote in message ...
Charlie England wrote:

Paul Lee wrote:
A forward air scoop gets high pressure - air ram. Does a rear facing
scoop generate low pressure (suction)?

Try:
http://www.cafefoundation.org/aprs/localflow2.pdf

'air extractors'

Thanks Charlie.
Fascinating stuff there.


Richard