Accession Number:

AD0754840

Title:

Flight Investigation of Various Longitudinal Short-Term Dynamics for STOL Landing Approach Using the X-22A Variable Stability Aircraft

Descriptive Note:

Final rept. Aug 1971-Mar 1972

Corporate Author:

CALSPAN CORP BUFFALO NY

Personal Author(s):

• Smith, R. E.
• Lebacqz, J. V.
• Schuler, J. M.

Report Date:

1973-01-01

Pagination or Media Count:

218.0

Abstract:

The first in-flight flying qualities experiment using the variable stability X-22A aircraft investigated longitudinal flying qualities requirements for STOL aircraft in terminal area operations. Emphasis was placed on defining minimum requirements for the short-term response in VFR and IFR landing approaches at representative steep STOL approach conditions of 65 and 80 knots. Evaluation flights were conducted in negligible and moderate turbulence for a wide range of short-term frequencies and dampings. Identification of the dynamics of the evaluation configurations was performed, to a large extent, by a new, advanced digital identification technique developed for the X-22A aircraft.

Descriptors:

• *SHORT TAKEOFF AIRCRAFT
• TURBULENCE
• POWER SPECTRA
• AERODYNAMIC CHARACTERISTICS
• SHROUDED PROPELLERS
• GLIDE PATH SYSTEMS
• APPROACH
• AIRCRAFT LANDINGS
• INSTRUMENT FLIGHT

Subject Categories:

• VSTOL

Distribution Statement:

APPROVED FOR PUBLIC RELEASE