Jim Wilson writes: > > > > > > > Well as a physicist (but with no formal aeronautical education), I always > think of it as the wing is pushing air down, which causes an "equal and > opposite force" (to quote Newton) of the air pushing the wing up. Hence > acrobatic aircraft with symmettrical wings can still fly. The key to wing > shape design is to keep the air flow attached to both the upper and lower > surface so that you can change the direction of airflow. Once the flow > detaches (a stall), you are not pushing the air down any more, so it isn't > pushing you up. > > > > This suggests that both bernoulli and the pushing (gravity) are at play, > depending on the airfoil. My (uneducated) guess is the pushing is almost all > of it and that the bernoulli effect only augments: > http://observe.arc.nasa.gov/nasa/exhibits/planes/planes_1c.html
This is a 100 year old argument :-) http://hyperphysics.phy-astr.gsu.edu/hbase/fluids/airfoil.html If you really want to know read everything you can wriiten by Koukowskii and Prandtl Cheers Norman _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
