Experimental Investigation of the Short-Period Requirements of MIL-F-8785C

Item

Title
Experimental Investigation of the Short-Period Requirements of MIL-F-8785C
Date
1986
Index Abstract
Coming Soon
Photo Quality
Not Needed
Report Number
AFWAL TR 86-3109 Volume 1
Corporate Author
ARVI/CALSPAN Advanced Technology Center
Laboratory
Flight Dynamics Laboratory
Date Issued
1986-11-01
Extent
124
Identifier
ADA180983
Access Rights
Approved for public release; distribution unlimited
Distribution Classification
1
Contract
F33615-83-C-3603
DoD Project
2403
DoD Task
240305
DTIC Record Exists
No
Distribution Change Authority Correspondence
None
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 aircraft's normal acceleration response to angle of attack changes (n/alpha). An investigation of the short period frequency requirements of MIL-F-8785C was performed using the USAF/TIFS in-flight simulator. Thirty-five evaluations of 18 configurations were conducted. The experiment examined the minimum frequency boundary at three values of (n/alpha) 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.
Report Availability
Full text available
Provenance
AFRL/VACA
Type
report
Format
1 online resource
Subject
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
Creator
Bailey, Randall E.