A flight evaluation was conducted to determine the effect of engine throttle response characteristics on precision formation-flying qualities. A variable electronic throttle control system was developed and flight-tested on a TF-104G airplane with a J79-11B engine at the NASA Dryden Flight Research Facility. This airplane was chosen because of its known, very favorable thrust response characteristics. Ten research flights were flown to evaluate the effects of throttle gain, time delay, and fuel control rate limiting on engine handling qualities during a demanding precision wing formation task. Handling quality effects of lag filters and lead compensation time delays were also evaluated. The Cooper and Harper Pilot Rating Scale was used to assign levels of handling quality. Data from pilot ratings and comments indicate that throttle control system time delays and rate limits cause significant degradations in handling qualities. Threshold values for satisfactory (level 1) and adequate (level 2) handling qualities of these key variables are presented. These results may provide engine manufacturers with guidelines to assure satisfactory handling qualities in future engine designs.
Summary of the Effects of Engine Throttle Response on Airplane Formation-Flying Qualities
1993
26 pages
Report
Keine Angabe
Englisch
Aeronautics , Aircraft , Jet & Gas Turbine Engines , Aircraft engines , Engine control , F-104 aircraft , Flight characteristics , Throttling , Thrust , Electronic control , Flight tests , Fuel control , Time lag , Aircraft control , Control systems design , Controllability , Engine design , Time dependence
Airplane flying qualities specification revision.
AIAA | 1969
|Airplane flying qualities specification revision
AIAA | 1968
|