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

During the pull-out maneuver, Peregrine falcons were observed to adoptspecific flight configurations which are thought to offer an aerodynamicadvantage over aerial prey. Analysis of the flight trajectory of a falcon in acontrolled environment shows it experiencing load factors up to 3 and furtherpredictions suggest this could be increased up to almost 10g during high-speedpull-out. This can be attributed to the high maneuverability promoted bylift-generating vortical structures over the wing. Wind-tunnel experiments onlife-sized models together with high fidelity simulations on idealized models,which are based on taxidermy falcons in different configurations, show thatdeploying the hand-wing in a pull-out creates extra vortex-lift, similar tothat of combat aircraft with delta wings. The aerodynamic forces and theposition of aerodynamic center were calculated from Large Eddy Simulations ofthe flow around the model. This allowed for an analysis of the longitudinalstatic stability in a pull-out, confirming that the falcon is flying unstablyin pitch with a positive slope in the pitching moment and a trim angle ofattack of about 5$^\circ$, possibly to maximize responsiveness. Thehand-wings/primaries were seen to contribute to the augmented stability actingas `elevons' would on a tailless blended-wing-body aircraft.

The Peregrine Falcon's Dive: On the Pull-Out Maneuver and Flight Control Through Wing-Morphing