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Keywords: propeller
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Journal Articles
J Exp Biol (2016) 219 (19): 3146–3154.
Published: 1 October 2016
... the aerodynamic performance of swept and extended wing postures of 13 raptor species in three families (Accipitridae, Falconidae and Strigidae) using a propeller model to emulate mid-downstroke of flapping during take-off and a wind tunnel to emulate gliding. Based on previous research, we hypothesized that (1...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (14): 2173–2181.
Published: 15 July 2016
... in vivo tonal sounds had peak fundamental frequencies around 700 Hz. Differences between our propeller model and in vivo flight could explain the discrepancy in this tonal content. Specifically, our propeller model spun feathers at constant angular velocity and at a single angle of attack, whereas...
Journal Articles
J Exp Biol (2012) 215 (21): 3693–3702.
Published: 1 November 2012
... strategy, we used a propeller and force-plate model to study aerodynamic force production across a developmental series of the altricial-flying mallard ( Anas platyrhynchos ). We observed the same trend in mallards as reported for chukar in that coefficients of vertical ( C V ) and horizontal force ( C H...
Includes: Supplementary data
Journal Articles
J Exp Biol (2002) 205 (11): 1565–1576.
Published: 1 June 2002
... the relationship. (e-mail: jimusherwood@lycos.co.uk ) 21 3 2002 © The Company of Biologists Limited 2002 2002 aerodynamics flight propeller force coefficient lift drag wing High force coefficients are required to account for hovering flight in animals ranging from small...
Journal Articles
J Exp Biol (2002) 205 (11): 1547–1564.
Published: 1 June 2002
... propeller models to investigate further the forces acting on model hawkmoth wings in `propeller-like' rotation (`revolution'). Steadily revolving model hawkmoth wings produce high vertical (≈ lift) and horizontal (≈ profile drag) force coefficients because of the presence of a leading-edge vortex. Both...