The Aeroelastic Instability of an Elevator Balance Horn in a Shear Layer Wake Flow

Format:

Conference/Event

Author/Creator:

Tate, Ralph, author.

Conference Name:

SAE Aerospace Technology Conference and Exposition (1986-10-13 : Long Beach, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1986

Summary:

The aeroelastic stability of a flexible elevator aerodynamic balance horn in a shear layer wake flow is investigated. The study was motivated by a pilot report of a "buzzing" observed on his aircraft's elevator aerodynamic horn balances under normal operating cruise conditions. Based on hot wire mean wake flow measurements, a "cosine"-type math model and a "Gaussian error function" math model are developed for the shear layer flow field. The resulting nonlinear dynamical equations of notion are evaluated for stability through the analysis of singular points in the phase plane. A limit cycle oscillation is found to occur under trim conditions where the elevator balance horn unports. Compliance with an existing civil aviation requirement for eliminating aeroelastic divergence on controls with aerodynamic horn overhang is recommended pending further study of the galloping phenomenon for the development of design guidelines

Notes:

Vendor supplied data

Publisher Number:

861827

Access Restriction:

Restricted for use by site license