Vortices enable the complex aerobatics of peregrine falcons
The peregrine falcon (Falco peregrinus) is known for its extremely high speeds during hunting dives or stoop. Here we demonstrate that the superior manoeuvrability of peregrine falcons during stoop is attributed to vortex-dominated flow promoted by their morphology, in the M-shape configuration adop...
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ftcityunivlondon:oai:openaccess.city.ac.uk:19679 2023-07-02T03:32:11+02:00 Vortices enable the complex aerobatics of peregrine falcons Gowree, E. R. Jagadeesh, C. Talboys, E. Lageman, C. Bruecker, C. 2018-04-05 text https://openaccess.city.ac.uk/id/eprint/19679/ https://openaccess.city.ac.uk/id/eprint/19679/1/Vortices%20enable%20the%20complex%20aerobatics%20of%20peregrine%20falcons.pdf https://doi.org/10.1038/s42003-018-0029-3 en eng Nature https://openaccess.city.ac.uk/id/eprint/19679/1/Vortices%20enable%20the%20complex%20aerobatics%20of%20peregrine%20falcons.pdf Gowree, E. R. orcid:0000-0001-5834-3020 orcid:0000-0001-5834-3020 , Jagadeesh, C. https://openaccess.city.ac.uk/view/creators_id/chetan=2Ejagadeesh=2E1.html , Talboys, E. https://openaccess.city.ac.uk/view/creators_id/edward=2Etalboys=2E1.html orcid:0000-0001-8993-0180 orcid:0000-0001-8993-0180 , Lageman, C. Bruecker, C. https://openaccess.city.ac.uk/view/creators_id/christoph=2Ebruecker.html orcid:0000-0001-5834-3020 orcid:0000-0001-5834-3020 view all authorsEPJS_limit_names_shown_load( 'creators_name_19679_et_al', 'creators_name_19679_rest' ); (2018). Vortices enable the complex aerobatics of peregrine falcons. Communications Biology, 1, 27. doi:10.1038/s42003-018-0029-3 https://doi.org/10.1038/s42003-018-0029-3 doi:10.1038/s42003-018-0029-3 cc_by_4 QL Zoology TL Motor vehicles. Aeronautics. Astronautics Article PeerReviewed 2018 ftcityunivlondon https://doi.org/10.1038/s42003-018-0029-3 2023-06-13T18:37:07Z The peregrine falcon (Falco peregrinus) is known for its extremely high speeds during hunting dives or stoop. Here we demonstrate that the superior manoeuvrability of peregrine falcons during stoop is attributed to vortex-dominated flow promoted by their morphology, in the M-shape configuration adopted towards the end of dive. Both experiments and simulations on life-size models, derived from field observations, revealed the presence of vortices emanating from the frontal and dorsal region due to a strong spanwise flow promoted by the forward sweep of the radiale. These vortices enhance mixing for flow reattachment towards the tail. The stronger wing and tail vortices provide extra aerodynamic forces through vortex-induced lift for pitch and roll control. A vortex pair with a sense of rotation opposite to that from conventional planar wings interacts with the main wings vortex to reduce induced drag, which would otherwise decelerate the bird significantly during pull-out. These findings could help in improving aircraft performance and wing suits for human flights. Article in Journal/Newspaper Falco peregrinus peregrine falcon City University London: City Research Online Communications Biology 1 1 |
institution |
Open Polar |
collection |
City University London: City Research Online |
op_collection_id |
ftcityunivlondon |
language |
English |
topic |
QL Zoology TL Motor vehicles. Aeronautics. Astronautics |
spellingShingle |
QL Zoology TL Motor vehicles. Aeronautics. Astronautics Gowree, E. R. Jagadeesh, C. Talboys, E. Lageman, C. Bruecker, C. Vortices enable the complex aerobatics of peregrine falcons |
topic_facet |
QL Zoology TL Motor vehicles. Aeronautics. Astronautics |
description |
The peregrine falcon (Falco peregrinus) is known for its extremely high speeds during hunting dives or stoop. Here we demonstrate that the superior manoeuvrability of peregrine falcons during stoop is attributed to vortex-dominated flow promoted by their morphology, in the M-shape configuration adopted towards the end of dive. Both experiments and simulations on life-size models, derived from field observations, revealed the presence of vortices emanating from the frontal and dorsal region due to a strong spanwise flow promoted by the forward sweep of the radiale. These vortices enhance mixing for flow reattachment towards the tail. The stronger wing and tail vortices provide extra aerodynamic forces through vortex-induced lift for pitch and roll control. A vortex pair with a sense of rotation opposite to that from conventional planar wings interacts with the main wings vortex to reduce induced drag, which would otherwise decelerate the bird significantly during pull-out. These findings could help in improving aircraft performance and wing suits for human flights. |
format |
Article in Journal/Newspaper |
author |
Gowree, E. R. Jagadeesh, C. Talboys, E. Lageman, C. Bruecker, C. |
author_facet |
Gowree, E. R. Jagadeesh, C. Talboys, E. Lageman, C. Bruecker, C. |
author_sort |
Gowree, E. R. |
title |
Vortices enable the complex aerobatics of peregrine falcons |
title_short |
Vortices enable the complex aerobatics of peregrine falcons |
title_full |
Vortices enable the complex aerobatics of peregrine falcons |
title_fullStr |
Vortices enable the complex aerobatics of peregrine falcons |
title_full_unstemmed |
Vortices enable the complex aerobatics of peregrine falcons |
title_sort |
vortices enable the complex aerobatics of peregrine falcons |
publisher |
Nature |
publishDate |
2018 |
url |
https://openaccess.city.ac.uk/id/eprint/19679/ https://openaccess.city.ac.uk/id/eprint/19679/1/Vortices%20enable%20the%20complex%20aerobatics%20of%20peregrine%20falcons.pdf https://doi.org/10.1038/s42003-018-0029-3 |
genre |
Falco peregrinus peregrine falcon |
genre_facet |
Falco peregrinus peregrine falcon |
op_relation |
https://openaccess.city.ac.uk/id/eprint/19679/1/Vortices%20enable%20the%20complex%20aerobatics%20of%20peregrine%20falcons.pdf Gowree, E. R. orcid:0000-0001-5834-3020 orcid:0000-0001-5834-3020 , Jagadeesh, C. https://openaccess.city.ac.uk/view/creators_id/chetan=2Ejagadeesh=2E1.html , Talboys, E. https://openaccess.city.ac.uk/view/creators_id/edward=2Etalboys=2E1.html orcid:0000-0001-8993-0180 orcid:0000-0001-8993-0180 , Lageman, C. Bruecker, C. https://openaccess.city.ac.uk/view/creators_id/christoph=2Ebruecker.html orcid:0000-0001-5834-3020 orcid:0000-0001-5834-3020 view all authorsEPJS_limit_names_shown_load( 'creators_name_19679_et_al', 'creators_name_19679_rest' ); (2018). Vortices enable the complex aerobatics of peregrine falcons. Communications Biology, 1, 27. doi:10.1038/s42003-018-0029-3 https://doi.org/10.1038/s42003-018-0029-3 doi:10.1038/s42003-018-0029-3 |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1038/s42003-018-0029-3 |
container_title |
Communications Biology |
container_volume |
1 |
container_issue |
1 |
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1770271694153318400 |