FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2135347777> ?p ?o ?g. }

• W2135347777 endingPage "414" @default.
• W2135347777 startingPage "403" @default.
• W2135347777 abstract "ABSTRACT Some falcons, such as peregrines (Falco peregrinus), attack their prey in the air at the end of high-speed dives and are thought to be the fastest of animals. Estimates of their top speed in a dive range up to 157 m s−1, although speeds this high have never been accurately measured. This study investigates the aerodynamic and gravitational forces on ‘ideal falcons’ and uses a mathematical model to calculate speed and acceleration during diving. Ideal falcons have body masses of 0.5–2.0 kg and morphological and aerodynamic properties based on those measured for real falcons. The top speeds reached during a dive depend on the mass of the bird and the angle and duration of the dive. Given enough time, ideal falcons can reach top speeds of 89–112 m s−1 in a vertical dive, the higher speed for the heaviest bird, when the parasite drag coefficient has a value of 0.18. This value was measured for low-speed flight, and it could plausibly decline to 0.07 at high speeds. Top speeds then would be 138–174 m s−1. An ideal falcon diving at angles between 15 and 90 ° with a mass of 1 kg reaches 95 % of top speed after travelling approximately 1200 m. The time and altitude loss to reach 95 % of top speed range from 38 s and 322 m at 15 ° to 16 s and 1140 m at 90 °, respectively. During pull out at top speed from a vertical dive, the 1 kg ideal falcon can generate a lift force 18 times its own weight by reducing its wing span, compared with a lift force of 1.7 times its weight at full wing span. The falcon loses 60 m of altitude while pulling out of the dive, and lift and loss of altitude both decrease as the angle of the dive decreases. The 1 kg falcon can slow down in a dive by increasing its parasite drag and the angle of attack of its wings. Both lift and drag increase with angle of attack, but the falcon can cancel the increased lift by holding its wings in a cupped position so that part of the lift is directed laterally. The increased drag of wings producing maximum lift is great enough to decelerate the falcon at −1.5 times the acceleration of gravity at a dive angle of 45 ° and a speed of 41 m s−1 (0.5 times top speed). Real falcons can control their speeds in a dive by changing their drag and by choosing the length of the dive. They would encounter both advantages and disadvantages by diving at the top speeds of ideal falcons, and whether they achieve those speeds remains to be investigated." @default.
• W2135347777 created "2016-06-24" @default.
• W2135347777 creator A5024943824 @default.
• W2135347777 date "1998-02-01" @default.
• W2135347777 modified "2023-10-15" @default.
• W2135347777 title "Gliding Flight: Speed and Acceleration of Ideal Falcons During Diving and Pull Out" @default.
• W2135347777 cites W1875104234 @default.
• W2135347777 cites W1904932783 @default.
• W2135347777 cites W1921571842 @default.
• W2135347777 cites W1937757997 @default.
• W2135347777 cites W1979480727 @default.
• W2135347777 cites W2061683445 @default.
• W2135347777 cites W2074727999 @default.
• W2135347777 cites W2083798596 @default.
• W2135347777 cites W2097854911 @default.
• W2135347777 cites W2131415393 @default.
• W2135347777 cites W2142050102 @default.
• W2135347777 cites W2163751240 @default.
• W2135347777 cites W2167160304 @default.
• W2135347777 cites W2285864661 @default.
• W2135347777 cites W2344439167 @default.
• W2135347777 doi "https://doi.org/10.1242/jeb.201.3.403" @default.
• W2135347777 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9427673" @default.
• W2135347777 hasPublicationYear "1998" @default.
• W2135347777 type Work @default.
• W2135347777 sameAs 2135347777 @default.
• W2135347777 citedByCount "71" @default.
• W2135347777 countsByYear W21353477772013 @default.
• W2135347777 countsByYear W21353477772014 @default.
• W2135347777 countsByYear W21353477772015 @default.
• W2135347777 countsByYear W21353477772016 @default.
• W2135347777 countsByYear W21353477772017 @default.
• W2135347777 countsByYear W21353477772018 @default.
• W2135347777 countsByYear W21353477772019 @default.
• W2135347777 countsByYear W21353477772020 @default.
• W2135347777 countsByYear W21353477772021 @default.
• W2135347777 countsByYear W21353477772022 @default.
• W2135347777 countsByYear W21353477772023 @default.
• W2135347777 crossrefType "journal-article" @default.
• W2135347777 hasAuthorship W2135347777A5024943824 @default.
• W2135347777 hasBestOaLocation W21353477771 @default.
• W2135347777 hasConcept C107779570 @default.
• W2135347777 hasConcept C117896860 @default.
• W2135347777 hasConcept C121332964 @default.
• W2135347777 hasConcept C127313418 @default.
• W2135347777 hasConcept C127413603 @default.
• W2135347777 hasConcept C13280743 @default.
• W2135347777 hasConcept C13393347 @default.
• W2135347777 hasConcept C146978453 @default.
• W2135347777 hasConcept C153294291 @default.
• W2135347777 hasConcept C204323151 @default.
• W2135347777 hasConcept C2524010 @default.
• W2135347777 hasConcept C33923547 @default.
• W2135347777 hasConcept C39432304 @default.
• W2135347777 hasConcept C527307 @default.
• W2135347777 hasConcept C57879066 @default.
• W2135347777 hasConcept C6350597 @default.
• W2135347777 hasConcept C74650414 @default.
• W2135347777 hasConcept C91586092 @default.
• W2135347777 hasConcept C97257150 @default.
• W2135347777 hasConceptScore W2135347777C107779570 @default.
• W2135347777 hasConceptScore W2135347777C117896860 @default.
• W2135347777 hasConceptScore W2135347777C121332964 @default.
• W2135347777 hasConceptScore W2135347777C127313418 @default.
• W2135347777 hasConceptScore W2135347777C127413603 @default.
• W2135347777 hasConceptScore W2135347777C13280743 @default.
• W2135347777 hasConceptScore W2135347777C13393347 @default.
• W2135347777 hasConceptScore W2135347777C146978453 @default.
• W2135347777 hasConceptScore W2135347777C153294291 @default.
• W2135347777 hasConceptScore W2135347777C204323151 @default.
• W2135347777 hasConceptScore W2135347777C2524010 @default.
• W2135347777 hasConceptScore W2135347777C33923547 @default.
• W2135347777 hasConceptScore W2135347777C39432304 @default.
• W2135347777 hasConceptScore W2135347777C527307 @default.
• W2135347777 hasConceptScore W2135347777C57879066 @default.
• W2135347777 hasConceptScore W2135347777C6350597 @default.
• W2135347777 hasConceptScore W2135347777C74650414 @default.
• W2135347777 hasConceptScore W2135347777C91586092 @default.
• W2135347777 hasConceptScore W2135347777C97257150 @default.
• W2135347777 hasIssue "3" @default.
• W2135347777 hasLocation W21353477771 @default.
• W2135347777 hasLocation W21353477772 @default.
• W2135347777 hasOpenAccess W2135347777 @default.
• W2135347777 hasPrimaryLocation W21353477771 @default.
• W2135347777 hasRelatedWork W1569654675 @default.
• W2135347777 hasRelatedWork W2135734641 @default.
• W2135347777 hasRelatedWork W2301031330 @default.
• W2135347777 hasRelatedWork W2314107956 @default.
• W2135347777 hasRelatedWork W2314542179 @default.
• W2135347777 hasRelatedWork W2532410374 @default.
• W2135347777 hasRelatedWork W2964807150 @default.
• W2135347777 hasRelatedWork W3135366282 @default.
• W2135347777 hasRelatedWork W3161108235 @default.
• W2135347777 hasRelatedWork W4283702158 @default.
• W2135347777 hasVolume "201" @default.
• W2135347777 isParatext "false" @default.
• W2135347777 isRetracted "false" @default.
• W2135347777 magId "2135347777" @default.

• next