3Modelling Helicopter Flight Dynamics: Building a Simulation Model
It is beyond dispute that the observed behaviour of aircraft is so complex and puzzling that without a well‐developed theory, the subject could not be treated intelligently. Theory has at least three useful functions:
- it provides a background for the analysis of actual occurrences;
- it provides a rational basis for the planning of experiments and tests, thus securing economy of effort;
- it helps the designer to design intelligently.
Theory, however, is never complete, final, or exact. Like design and construction, it is continually developing and adapting to circumstances.
(Duncan 1952)
3.1 Introduction and Scope
The attributes of theory described by Duncan in this chapter's guiding quote have a ring of eternal validity to them. With today's perspective, we could add a little more. Theory helps the flying qualities engineer to gain a deep understanding of the behaviour of flight and the limiting conditions imposed by the demands of flying tasks, hence providing insight and stimulating inspiration. ...
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