Ain't going to work in 3D and it will depend on the reynolds number whats going to happen. There is all sorts of vortexes coming into play and where they produce there max drag who knows only can be found out in a wind tunnel because its so none linear.
Also as well you don;t loose all your lift after stalling there is still a fair bit left up to half until 45degrees angle of attack.
And if its bluff body with no spin the tail is offset so will lift with the drag and the nose will drop and we are flying again.
Oh and a foil has a Cd that get up to 1.5-1.7 at 90 degrees angle of attack which is why they don't park the wind turbines with blades flat.
I reckon its going to be about 45 to 50 degrees angle of attack which is going to give you max combined lift and drag post stall.
Last edited by mad_jock; 11th Dec 2012 at 19:36.