Leland M. Nicolai,Grant E. Carichner
The aircraft is only a transport mechanism for the payload, and all design decisions must consider payload first. Simply stated, the aircraft is a dust cover. "Fundamentals of Aircraft and Airship Design, Volume 1: Aircraft Design" emphasizes that the science and art of the aircraft design process is a compromise and that there is no right answer; however, there is always a best answer based on existing requirements and available technologies. 
Science,Engineering
Fundamentals of Aircraft and Airship Design: Volume I--Aircraft Design