1. ...take care to that mistake (sleep better !)
Drag and Lift are not connected to gravity direction, but to airspeed direction.
Weight and Power come in balance (or unbalance) with Drag and Lift.
2. For these who find the discussion too difficult, stay with Gentry
3. For our PPRuNe's Flight Gods, perhaps they don't understand fractals, equations, aso. but with their brain and body they understand Lift, Drag, Weight, Power, and evolutions in the air better than all of us.
4. Lift and Drag and viscosity are some of the most difficult things to understand. Our best models are still far away from reality... don't desesperate !