Correlation of Experimental Aerodynamic Coefficients on the Basis of Curve Fitting in the Three-Dimensional Cartesian alpha, (C sub N), (C sub m) Space.
Abstract
A method is presented for curve fitting experimental aerodynamic normal-force and pitching-moment coefficient data as a function of angle of attack. The method is based on the postulation of the existence of a single (C sub N)-(C sub m)-alpha space curve that has a common offset value of the angle of attack for which the normal-force and pitching-moment coefficients simultaneously vanish. The curve fits in the (C sub N)-(alpha) and (C sub m)-(alpha) planes are based on minimizing the squared error between the fitted curves and the experimental data by proper selection of the curve-fit coefficients and the common angle-of-attack offset value. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 13, 1971
- Accession Number
- AD0732834
Entities
People
- Alva L. Addy
- Helmut H. Korst
Organizations
- United States Army Aviation and Missile Command