Data from: When conifers took flight: A biomechanical evaluation of an imperfect evolutionary takeoff

Stevenson RA, Evangelista D, Looy CV

Date Published: November 7, 2014

DOI: http://dx.doi.org/10.5061/dryad.h6289

 

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Title Nondimensional aerodynamic parameters versus disk loading
Downloaded 21 times
Description Nondimensional aerodynamic parameters versus disk loading (eq. 3) for all autorotative descents of Manifera talaris models and Agathis australis models and seeds. A, Reynolds number (Re, eq. 1). B, Advance ratio (J, eq. 2). C, Effective lift coefficient (CL,eff, eq. 7). D, Effective drag coefficient (CD,eff, eq. 6).
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Title Kinematic changes with increased mass
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Description Kinematic changes with increased mass. A, Vertical component of aerodynamic forces balances weight, while the lateral component provides for the centripetal acceleration of the spinning seed. B, As mass increases, the autorotation frequency f1R increases and the coning angle (β) reduces. These changes result in a more vertically oriented and larger aerodynamic force to balance the increased weight, allowing the descent speed V to remain nearly constant.
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Title Laser cutter source file for winged seed models
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Description Laser cutter (.ai) source file for winged seed models.
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Title Laser cutter source file for adhesive polyester film weights used in ballasting
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Description Laser cutter (.ai) source file for adhesive polyester film weights used in ballasting.
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Title Representative autorotative descent in a Manifera talaris single-winged model
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Description Representative autorotative descent in a Manifera talaris single-winged model, filmed at 500 fps, model is 9.5 mg.
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When using this data, please cite the original publication:

Stevenson RA, Evangelista D, Looy CV (2015) When conifers took flight: A biomechanical evaluation of an imperfect evolutionary takeoff. Paleobiology 41(2): 205-225. http://dx.doi.org/10.1017/pab.2014.18

Additionally, please cite the Dryad data package:

Stevenson RA, Evangelista D, Looy CV (2015) Data from: When conifers took flight: A biomechanical evaluation of an imperfect evolutionary takeoff. Dryad Digital Repository. http://dx.doi.org/10.5061/dryad.h6289
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