Title

Lateral Flying Qualities of Highly Augmented Fighter Aircraft

Date

1982

Index Abstract

Coming Soon

Photo Quality

Complete

Report Number

AFWAL TR 81-3171 Volume 1

Creator

Monagan, Stephen J.

Bailey, Randall E.

Smith, Rogers E.

Corporate Author

Calspan Corporation

Laboratory

Flight Dynamics Laboratory

Extent

84

Identifier

ADA118070

Access Rights

Approved for public release; distribution unlimited

Distribution Classification

1

Contract

F33615-79-C-3618

DoD Project

None Given

DoD Task

None Given

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Abstract

This in-flight simulation experiment, using the USAF NT-33 variable stability aircraft operated by Calspan, was undertaken to generate later-directional flying qualities data applicable to highly augmented fighter aircraft. In particular, the effects of time delay and prefilter lag in the lateral flight control system were studied for representative Flight Phase Category A and C tasks. The combined effects of those elements as well as the effects of nonlinear command gain and high Dutch roll damping were also evaluated. Tasks included were actual target tracking, air refueling and precision landing as well as special Head-Up Display (HUD) tracking tasks. Results indicated that a properly designed HUD bank angle tracking task is a valid flying qualities evaluation task. Data show that lateral flying qualities are very sensitive to control system time dealy and very short values of roll mode time constant typically result in poor lateral flying qualities. Excellent separation of the data into flying qualities level is achieved for the Category A task data using time domain equivalent systems parameters. An optimum equivalent time constant value of 0.5 sec is indicated by the data; sensitivity to equivalent time delay is a minimum at this value. Volume I contains the body of the report, while Volume II consists of the Appendices.

Report Availability

Full text available

Date Issued

1982-06

Provenance

AFRL/VACA

Type

report

Format

1 online resource

Subject

Fighter aircraft

Flight control systems

Flight simulation

Variable stability aircraft

Augmentation

Jet lag

Roll

Damping

Optimization

Test and evaluation

Comparison

Configurations

Parameters