Accession Number:
ADA180983
Title:
Experimental Investigation of the Short-Period Requirements of MIL-F-8785C. Volume 1.
Descriptive Note:
Interim rept. Jun 84-Dec 85,
Corporate Author:
ARVIN/CALSPAN ADVANCED TECHNOLOGY CENTER BUFFALO NY
Personal Author(s):
Report Date:
1986-11-01
Pagination or Media Count:
119.0
Abstract:
In the current military specification for flying qualities of piloted airplanes MIL-F-8785C, the short period frequency requirement is expressed as a function of the aircrafts normal acceleration response to angle of attack changes nalpha. An investigation of the short period frequency requirements of MIL-F-8785C was performed using the USAFTIFS in-flight simulator. Thirty-five evaluations of 18 configurations were conducted. The experiment examined the minimum frequency boundary at three values of nalpha for one true airspeed. The experiment included the effects of pilot location and evaluation task. The data indicate that the current requirement is essentially valid. The minimum acceptable frequency boundary may be relaxed, however, when the pilot station is forward of the center of rotation. Also, the phasing between the normal acceleration and pitch rate responses has been shown to be a critical determinant of longitudinal short period flying qualities. The results are analyzed using the equivalent systems methodology. Keywords Flying qualities Handling qualities Flight control system Control Also anticipation parameter.
Descriptors:
- *FLIGHT CONTROL SYSTEMS
- *SPECIFICATIONS
- *FLIGHT MANEUVERS
- ACCELERATION
- RESPONSE
- PILOTS
- HANDLING
- QUALITY
- MILITARY REQUIREMENTS
- AIRSPEED
- AIRCRAFT
- METHODOLOGY
- BOUNDARIES
- FREQUENCY
- INFLIGHT
- SIMULATORS
- STATIONS
- PITCH(MOTION)
- REQUIREMENTS
- SHORT RANGE(TIME)
- ANGLE OF ATTACK
- MAN MACHINE SYSTEMS
- LOAD DISTRIBUTION
- ATTITUDE CONTROL SYSTEMS
- MANUAL OPERATION
- ROTATION
- CONTROL STICKS
- AUGMENTATION
- AERODYNAMIC STABILITY
- TRANSFER FUNCTIONS
Subject Categories:
- Flight Control and Instrumentation
- Military Aircraft Operations
- Aerodynamics