Vstol development of the c-130 hercules

Dansby, T.; Garrard, W. C. J.; Ryle, D.; Sullivan, Larry

doi:10.2514/3.43590

Cited by 5 publications

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Flight mechanics model for spanwise lift and rolling moment distributions of a segmented active high-lift wing

Diekmann¹,

Keller²,

Faez

et al. 2017

CEAS Aeronaut J

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In this study the aerodynamics of wings using an active high-lift system are investigated. The target is the flight mechanical description of the spanwise forces and resulting moments and the influence of the active high-lift system to their distribution. The high-lift system is a blown flap system divided into six segments per wing. Each segment is assumed to be individually controlled, so the system shall be used for aircraft control and system failure management. This work presents a flight mechanical model for the simulation of flight dynamics, which has been derived from high-fidelity CFD results. An assessment of single segment blowing system failures will be presented including recommendations for compensation of either lift or rolling moment loss. For this investigation, the compensation is required to act at the same wing on which the failure appears.shall be proven. The results show that less performance investment in terms of pressurized air is necessary to compensate the rolling moment of a failing segment instead of its lift. However, large performance increases for the remaining wing segments occur for some of the failure cases.

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Flight mechanics model for spanwise lift and rolling moment distributions of a segmented active high-lift wing

Diekmann¹,

Keller²,

Faez

et al. 2017

CEAS Aeronaut J

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Controllability of an aircraft with active high-lift system using a segmentwise controllable flap system

et al. 2018

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Active high-lift aircraft needs exceptional aerodynamic control performance to operate at low airspeed. In this study, a new concept for the improvement of controllability is investigated, incorporating the special capabilities of a blown Coandȃ flap system. The blowing system along the flaps is divided into 12 independently controllable segments. This provides the opportunity to influence the lift distribution along the wingspan by individual blowing performance settings for each segment without changing the flap deflection. This offers the chance to control the airplane in the final approach phase with fully deflected flaps using only the blowing system and to dedicate specific control tasks to particular segments. A model for the blowing system influence on the local wing aerodynamics is implemented in an existing nonlinear full aircraft flight mechanics model. The system capabilities in terms of roll control and the climb performance are investigated by criteria' evaluation and dynamic simulation assessment. The ability to fly turn/altitude change maneuvers by utilizing the active high-lift system is proven and a corresponding control concept is presented. It also includes the compensation of different blowing failure cases, which leads to acceptable but still improvable aircraft reactions.

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Advanced Aircraft Flight Performance

Filippone

2012

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This book discusses aircraft flight performance, focusing on commercial aircraft but also considering examples of high-performance military aircraft. The framework is a multidisciplinary engineering analysis, fully supported by flight simulation, with software validation at several levels. The book covers topics such as geometrical configurations, configuration aerodynamics and determination of aerodynamic derivatives, weight engineering, propulsion systems (gas turbine engines and propellers), aircraft trim, flight envelopes, mission analysis, trajectory optimisation, aircraft noise, noise trajectories and analysis of environmental performance. A unique feature of this book is the discussion and analysis of the environmental performance of the aircraft, focusing on topics such as aircraft noise and carbon dioxide emissions.

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Vstol development of the c-130 hercules

Cited by 5 publications

References 0 publications

Flight mechanics model for spanwise lift and rolling moment distributions of a segmented active high-lift wing

Flight mechanics model for spanwise lift and rolling moment distributions of a segmented active high-lift wing

Controllability of an aircraft with active high-lift system using a segmentwise controllable flap system

Advanced Aircraft Flight Performance

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