Accession Number:

AD0656784

Title:

FLIGHT INVESTIGATION OF LONGITUDINAL SHORT PERIOD FREQUENCY REQUIREMENTS AND PIO TENDENCIES

Descriptive Note:

Final rept.

Corporate Author:

CORNELL AERONAUTICAL LAB INC BUFFALO NY

Personal Author(s):

• DiFranco, Dante A.

Report Date:

1967-06-01

Pagination or Media Count:

158.0

Abstract:

The results of a flight test program to investigate longitudinal short period frequency requirements and PIO pilot-induced oscillation tendencies are presented and discussed. Short period frequency requirements were investigated with a damping ratio of approximately 0.7 at three fixed values. PIO tendencies were investigated with various values. The feel system dynamic characteristics were held essentially constant throughout the program. A variable stability T-33 airplane was used as an in-flight simulator. Each configuration was evaluated as a fighter in up and away flight. The evaluation pilots commented on each configuration and rated each numerically. An analysis of pilot ratings and pilot comments was made, and these in turn were related to various handling qualities parameters. In the analysis and interpretation of the handling qualities results, feel system dynamics and pilot-selected stick force gradients were also important considerations.

Descriptors:

• *JET TRAINING AIRCRAFT
• FLIGHT TESTING
• FREQUENCY
• HANDLING
• MANEUVERABILITY
• OSCILLATION
• PERFORMANCE(ENGINEERING)
• PILOTS
• SIMULATION
• STABILITY

Subject Categories:

• Training Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE