Peregrine Falcon’s Dive: Pullout Maneuver and Flight Control Through Wing Morphing
International audience During the pullout maneuver, peregrine falcons were observed to adopt a succession of specific flight configurations that are thought to offer an aerodynamic advantage over aerial prey. Analysis of the flight trajectory of a falcon in a controlled environment shows it experien...
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Online Access: | https://hal.archives-ouvertes.fr/hal-03407830 https://hal.archives-ouvertes.fr/hal-03407830/document https://hal.archives-ouvertes.fr/hal-03407830/file/Selim_28180.pdf https://doi.org/10.2514/1.J060052 |
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ftccsdartic:oai:HAL:hal-03407830v1 2023-05-15T17:55:13+02:00 Peregrine Falcon’s Dive: Pullout Maneuver and Flight Control Through Wing Morphing Selim, Omar Gowree, Erwin Ricky Lagemann, Christian Talboys, Edward Jagadeesh, Chetan Brücker, Christoph City University of London Département Aérodynamique Energétique et Propulsion (DAEP) Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO) RWTH Aachen University 2021-10 https://hal.archives-ouvertes.fr/hal-03407830 https://hal.archives-ouvertes.fr/hal-03407830/document https://hal.archives-ouvertes.fr/hal-03407830/file/Selim_28180.pdf https://doi.org/10.2514/1.J060052 en eng HAL CCSD American Institute of Aeronautics and Astronautics info:eu-repo/semantics/altIdentifier/doi/10.2514/1.J060052 hal-03407830 https://hal.archives-ouvertes.fr/hal-03407830 https://hal.archives-ouvertes.fr/hal-03407830/document https://hal.archives-ouvertes.fr/hal-03407830/file/Selim_28180.pdf doi:10.2514/1.J060052 OATAO: 28180 ISSN: 0001-1452 EISSN: 1533-385X AIAA Journal https://hal.archives-ouvertes.fr/hal-03407830 AIAA Journal, American Institute of Aeronautics and Astronautics, 2021, 59 (10), pp.3979-3987. ⟨10.2514/1.J060052⟩ Peregrine falcon Maneuvre Morphing [SPI.OTHER]Engineering Sciences [physics]/Other info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.2514/1.J060052 2021-10-30T22:22:26Z International audience During the pullout maneuver, peregrine falcons were observed to adopt a succession of specific flight configurations that are thought to offer an aerodynamic advantage over aerial prey. Analysis of the flight trajectory of a falcon in a controlled environment shows it experiencing load factors up to 3g, and further predictions suggest this could be increased up to almost 10g during high-speed pullout. This can be attributed to the high maneuverability promoted by lift-generating vortical structures over the wing. Wind-tunnel experiments on life-sized models in the different configurations together with high-fidelity computational fluid dynamics simulations (large-eddy simulations) show that deploying the hand wing in a pullout creates extra vortex lift, which is similar to that of combat aircraft with delta wings. The aerodynamic forces and the position of the aerodynamic center were calculated from the simulations of the flow around the different configurations. This allowed for an analysis of the longitudinal static stability in the early pullout phase, confirming that the falcon is flying unstably in pitch with a positive slope in the pitching moment and a trim angle of attack of about 5 deg, which is possibly to maximize responsiveness. The hand wings/primaries were seen to contribute to the augmented stability, acting as “elevons” would on a tailless blended-wing/body aircraft. Article in Journal/Newspaper peregrine falcon Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) AIAA Journal 59 10 3979 3987 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Peregrine falcon Maneuvre Morphing [SPI.OTHER]Engineering Sciences [physics]/Other |
spellingShingle |
Peregrine falcon Maneuvre Morphing [SPI.OTHER]Engineering Sciences [physics]/Other Selim, Omar Gowree, Erwin Ricky Lagemann, Christian Talboys, Edward Jagadeesh, Chetan Brücker, Christoph Peregrine Falcon’s Dive: Pullout Maneuver and Flight Control Through Wing Morphing |
topic_facet |
Peregrine falcon Maneuvre Morphing [SPI.OTHER]Engineering Sciences [physics]/Other |
description |
International audience During the pullout maneuver, peregrine falcons were observed to adopt a succession of specific flight configurations that are thought to offer an aerodynamic advantage over aerial prey. Analysis of the flight trajectory of a falcon in a controlled environment shows it experiencing load factors up to 3g, and further predictions suggest this could be increased up to almost 10g during high-speed pullout. This can be attributed to the high maneuverability promoted by lift-generating vortical structures over the wing. Wind-tunnel experiments on life-sized models in the different configurations together with high-fidelity computational fluid dynamics simulations (large-eddy simulations) show that deploying the hand wing in a pullout creates extra vortex lift, which is similar to that of combat aircraft with delta wings. The aerodynamic forces and the position of the aerodynamic center were calculated from the simulations of the flow around the different configurations. This allowed for an analysis of the longitudinal static stability in the early pullout phase, confirming that the falcon is flying unstably in pitch with a positive slope in the pitching moment and a trim angle of attack of about 5 deg, which is possibly to maximize responsiveness. The hand wings/primaries were seen to contribute to the augmented stability, acting as “elevons” would on a tailless blended-wing/body aircraft. |
author2 |
City University of London Département Aérodynamique Energétique et Propulsion (DAEP) Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO) RWTH Aachen University |
format |
Article in Journal/Newspaper |
author |
Selim, Omar Gowree, Erwin Ricky Lagemann, Christian Talboys, Edward Jagadeesh, Chetan Brücker, Christoph |
author_facet |
Selim, Omar Gowree, Erwin Ricky Lagemann, Christian Talboys, Edward Jagadeesh, Chetan Brücker, Christoph |
author_sort |
Selim, Omar |
title |
Peregrine Falcon’s Dive: Pullout Maneuver and Flight Control Through Wing Morphing |
title_short |
Peregrine Falcon’s Dive: Pullout Maneuver and Flight Control Through Wing Morphing |
title_full |
Peregrine Falcon’s Dive: Pullout Maneuver and Flight Control Through Wing Morphing |
title_fullStr |
Peregrine Falcon’s Dive: Pullout Maneuver and Flight Control Through Wing Morphing |
title_full_unstemmed |
Peregrine Falcon’s Dive: Pullout Maneuver and Flight Control Through Wing Morphing |
title_sort |
peregrine falcon’s dive: pullout maneuver and flight control through wing morphing |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-03407830 https://hal.archives-ouvertes.fr/hal-03407830/document https://hal.archives-ouvertes.fr/hal-03407830/file/Selim_28180.pdf https://doi.org/10.2514/1.J060052 |
genre |
peregrine falcon |
genre_facet |
peregrine falcon |
op_source |
ISSN: 0001-1452 EISSN: 1533-385X AIAA Journal https://hal.archives-ouvertes.fr/hal-03407830 AIAA Journal, American Institute of Aeronautics and Astronautics, 2021, 59 (10), pp.3979-3987. ⟨10.2514/1.J060052⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.2514/1.J060052 hal-03407830 https://hal.archives-ouvertes.fr/hal-03407830 https://hal.archives-ouvertes.fr/hal-03407830/document https://hal.archives-ouvertes.fr/hal-03407830/file/Selim_28180.pdf doi:10.2514/1.J060052 OATAO: 28180 |
op_doi |
https://doi.org/10.2514/1.J060052 |
container_title |
AIAA Journal |
container_volume |
59 |
container_issue |
10 |
container_start_page |
3979 |
op_container_end_page |
3987 |
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1766163136330596352 |