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.