English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Albatrosses can travel a thousand kilometers daily over the oceans. This featis achieved through dynamic soaring, a non-flapping flight strategy wherepropulsive energy is extracted from horizontal wind shears. Dynamic soaring hasbeen described as a sequence of half-turns connecting upwind climbs anddownwind dives through the surface shear layer. We analytically and numericallyinvestigate the aerodynamically optimal flight trajectory for varying shearthicknesses. Contrary to current thinking, but consistent with GPS recordingsof flying albatrosses, in thin shears the optimal trajectory is composed ofsmall angle arcs. Essentially, the albatross is a flying sailboat, sequentiallyacting as sail and keel, and most efficient when remaining crosswind. Ouranalysis constitutes a general framework for dynamic soaring, and more broadlyenergy extraction in complex winds.

Asymptotic Solution to the Rayleigh Problem of Dynamic Soaring