Longitudinal Handling Qualities of the Tu-144LL Airplane and Comparisons With Other Large, Supersonic Aircraft
Cox, Timothy H. and Marshall, Alisa (2000) Longitudinal Handling Qualities of the Tu-144LL Airplane and Comparisons With Other Large, Supersonic Aircraft. Technical Report NASA/TM-2000-209020, Research Engineering, NASA Dryden Flight Research Center.
Full text available as: |
Abstract
Four flights have been conducted using the Tu-144LL supersonic transport aircraft with the dedicated objective of collecting quantitative data and qualitative pilot comments. These data are compared with the following longitudinal flying qualities criteria: Neal-Smith, short-period damping, time delay, control anticipation parameter, phase delay (omega sub sp * T sub theta sub 2), pitch bandwidth as a function of time delay, and flightpath as a function of pitch bandwidth. Determining the applicability of these criteria and gaining insight into the flying qualities of a large, supersonic aircraft are attempted. Where appropriate, YF-12, XB-70, and SR-71 pilot ratings are compared with the Tu-144LL results to aid in the interpretation of the Tu-144LL data and to gain insight into the application of criteria. The data show that approach and landing requirements appear to be applicable to the precision flightpath control required for up-and-away flight of large, supersonic aircraft. The Neal-Smith, control anticipation parameter, and pitch-bandwidth criteria tend to correlate with the pilot comments better than the phase delay criterion, omega sub sp * T sub theta sub 2. The data indicate that the detrimental flying qualities implication of decoupled pitch-attitude and flightpath responses occurring for high-speed flight may be mitigated by requiring the pilot to close the loop on flightpath or vertical speed.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Bandwidth criterion, Control anticipation criterion, Flying qualities, Neal-Smith criterion, Short period criteria, SR-71 aircraft, Supersonic flying qualities, TU-144 aircraft, XB-70 aircraft |
| Subjects: | (01 - 09) Aeronautics: (02) Aerodynamics Aircraft/Project: SR-71 Blackbird Aircraft/Project: YF-12 Aircraft/Project: XB-70 |
| ID Code: | 71 |
| Deposited On: | 12 July 2004 |
| Additional Information: | 44 pages. |
