Thanks to Multiflyer& BMathews .May I pose these basic FAQ 's once again, somebody out there maybe can help . When helping newcomers or chatting with my buddies I often find myself unable to properly answer what at first seems some simple questions. What makes the wing lift ? Quickly followed by ;why does the top surface provide more lift than the bottom (one engineer friend says I have it backwards )and what is the ratio ? This can quickly go to props .Which side provides most thrust & why, & so on into turbines with reversers .
Once this happens we go thru a very unconvincing outbursts of Newton , Bernoulli ,Coanda & under camber . Is it possible simple answers are not to be had and I'm being silly ?