Units are an arbitrary measure of aoa. 19 units, or 19.2 depanding on K or M and in what situation, represented CL max. So best turn and best lift/drag on approach. Beyond 19 units there be dragons.
F-15 was different. It was 'naturally' spin resistant and you take it pretty much to whatever aoa it could give you. I don't know what it was in degrees, but we were taught and used to teach a last ditch, quick reversal manoeuvre called a pirouette. See some of the other high aoa stuff for an explanation. Or come back to me.
Last edited by Courtney Mil; 4th Jun 2013 at 20:23.