The following link is to Sydney Uni's aero eng course work. The authors are pretty serious academic researchers and know their stuff. Worth a read for those who are interested in the engineering basics of this and that to do with flying machines. (Not that I'd give a plug to a particular university .. even if my engineering degree is from there ..)
Aerodynamics for Students | www.aerodynamics4students.com
The specific discussion on takeoff and landing is at this link -
http://www.aerodynamics4students.com...nd-landing.php