Non-Linear Aerodynamic Characteristics Obtained from the Analysis of Flight-Data
Abstract
A least squares regression analysis program has been documented and its advantages and shortcomings when used for analysing flight data have been summarised. It has been shown that the shortcomings can be largely overcome by pre-processing flight measurements via compatibility checking. A particular advantage of the least squares approach is the ability to partition data into angle of attack subsets. Application to flight data from from a delta wing aircraft at M=0.65 has been successful in extracting non-linear features, including a sharp drop in pitch damping at around 4 degrees angle of attack, possibly associated with the development of the leading edge vortex. Comparison with previous results, internal consistency, and small scatter all confirm the effectiveness of this approach even with moderate quality instrumentation. The methodology described has considerable potential for application to highly non-linear flight regimes. Australia.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1987
- Accession Number
- ADA201073
Entities
People
- R. A. Feik