Accession Number:

AD0774434

Title:

An Analysis of the Longitudinal Dynamics of a STOL Transport in Landing Approach.

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s):

• Personius,Glen M.

Report Date:

1973-12-01

Pagination or Media Count:

83.0

Abstract:

The longitudinal dynamic response of representative STOL transport in landing approach was analyzed and the results compared with existing military handling qualities specifications. Eigenvalues and eigenvectors for the basic airplane were calculated using EISPACK subroutines for the CDC-6600 computer. Time histories of response were obtained by using series expansion techniques to solve the state equations. The parameter, Mu, change in pitching moment with change in forward speed, was found to have a powerful effect on both static and dynamic stability. Low short period frequency and negative phugoid damping in the landing approach speed range, combined with strong coupling between flight path and airspeed, make the basic airplane longitudinal dynamics unacceptable. Some suggestions are made relative to the preliminary design of a stability augmentation system for this airplane. Author

Descriptors:

• *Short takeoff aircraft
• *Aircraft landings
• Handling
• Dynamics
• Stability
• Dynamic response
• Theses

Subject Categories:

• VSTOL

Distribution Statement:

APPROVED FOR PUBLIC RELEASE