Approach and landing longitudinal flying qualities for large transports based on in-flight results

Field, Edmund; Rossitto, Ken

doi:10.2514/6.1999-4095

Cited by 4 publications

(1 citation statement)

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“…Previous approaches to assess HQs of flexible aircraft were mainly based on the longitudinal dynamics (Andrews, 2011;Damveld, 2009;Field & Rossitto, 1999;Waszak & Schmidt, 1988). As pilots, placed in front of an aircraft, experienced different dynamics than the ones at the centre of gravity (CG) due to the bending of long slender fuselages, it was important to investigate the way those deformations altered pilots' perception of HQs.…”

Section: Introductionmentioning

confidence: 99%

Simulated Pilot-in-the-Loop Testing of Handling Qualities of the Flexible Wing Aircraft

Portapas

Cooke

2020

Aviation

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This article aims to indicate the differences between rigid and flexible wing aircraft flying (FQ) and handling (HQ) qualities. The Simulation Framework for Flexible Aircraft was used to provide a generic cockpit environment and a piloted mathematical model of a bare airframe generic high aspect ratio wing aircraft (GA) model. Three highly qualified test pilots participated in the piloted simulation trials campaign and flew the GA model with both rigid and flexible wing configurations. The results showed a negligible difference for the longitudinal HQs between rigid and flexible wing aircraft. However, significant changes were indicated for the lateral/directional HQs of the flexible wing aircraft. A wing ratcheting phenomenon manifested itself during the roll mode tests, the spiral mode exhibited neutral stability and the Dutch roll mode shape changed from a horizontal to a vertical ellipse. The slalom task flight tests, performed to assess the FQs of the aircraft, revealed the degradation of both the longitudinal and lateral/directional FQs.

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Section: Introductionmentioning

confidence: 99%