[ Your Name ]  would like to inform you about this article on
Complexity Digest 2003.28 - 16
http://comdig.unam.mx/index.php?id_issue=2003.28#12051
14-Jul-2003

[ Your Message ]



Delta-Wing Function Of Webbed Feet In Birds, Nature
 









Excerpts: Most foot-propelled swimming birds sweep their webbed feet backwards
in a curved path that lies in a plane aligned with the swimming direction.
(...), early in the power stroke, propulsion is achieved mostly by hydrodynamic
drag on the foot, whereas there is a gradual transition into lift-based
propulsion later in the stroke. (...) Because of their delta shape, webbed feet
can generate propulsive forces continuously through two successivemodes, from
drag at the beginning of the stroke, all the way through the transition to
predominantly lift later in the stroke.
Source: Delta-Wing Function Of Webbed Feet In Birds[
http://www.nature.com/cgi-taf/DynaPage.taf?file=/nature/journal/v424/n6944/full/nature01695_fs.html
], L. Christoffer Johansson, R. Åke Norberg, DOI: 10.1038/nature01695, Nature
424, 65 - 68, 03 July 2003

You can discuss this article on Articles Forum
http://comdig.unam.mx/topic.php?id_article=12051