Bye,
You have complained that nobody will explain the basic aerodynamics to you but you yourself gave a reference to a document that does just that in post #27. Is it unreasonable to expect that you have read this?
You are a design engineer and own a company that designs aero. engines so you ought to be able to put some numbers in the equations given in your reference, or employ someone who could do it for you, so if I give you some realistic values you can check what others are saying for yourself.
For an aircraft of the B737/A320 class:
Cdo (profile drag coefficient) 0.018
K (induced drag factor) 0.0425
Wing area 1300 sq.ft
Weights between 180,000 and 120,000 lb
Over to you
Last edited by Owain Glyndwr; 24th Nov 2012 at 12:36.