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Longitudinal stability and control derivatives obtained from flight data of a pa-30 aircraft
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sandlin, D. R. Turley, D. R. |
| Copyright Year | 1981 |
| Description | In order to obtain reliable and accurate values of the stability and control derivatives, the Dryden Fligh Research Center (DFRC) developed a technique for extracting the derivatives from flight data. This technique is implemented by a set of FORTRAN computer programs that is based on a modified maximum likelihood estimator that uses the Newton-Raphson algorithm to perform the required minimization of the derivatives. Data was obtained with a PA-30, light twin-engine general aviation aircraft in zero, half, and full flap configuration in level unaccelerated flight with the landing gear retracted. The derivatives were plotted as functions of angle of attack using various graphical arrangements to show variations of wind tunnel and flight determined values at zero flap settings. Also, data was displayed to show the effects of flap deflection and thrust variation on the longitudinal stability derivatives. The angle of attack and angle of sideslip were measured. The dynamic pressure, velocity, and altitude were calculated, using a FORTRAN computer program, from the static and dynamic pressures. The control deflections of the stabilator, ailerons, and rudder also were recorded along with left throttle position, engine rpm, and manifold pressure. |
| File Size | 1617429 |
| Page Count | 59 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860021264 |
| Archival Resource Key | ark:/13960/t5n922r13 |
| Language | English |
| Publisher Date | 1981-04-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Stability And Control Flight Tests Civil Aviation Pulse Code Modulation Longitudinal Stability Sideslip Aircraft Control Fortran Algorithms Wind Tunnel Tests Aircraft Maneuvers Applications Programs Computers Maximum Likelihood Estimates Pressure Measurement Angle of Attack Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
