Re: [dinosaur] Archaeopteryx had active flapping flight ability based on wing bone geometry (free pdf)

[Mike Habib <biologyinmotion@gmail.com>]

> The strong upward flight stroke provides steep climb.
> The aerodynamically efficient wings and feathers reduce the launch velocity.
> The launch velocity can be attend by running, leaping, or falling down
> from height (e.g., bats).
> 
> These are independent things, not necessarily linked together.
> 
> Haoyang

Indeed - with the one caveat that bats donât actually fall to launch from 
ceilings. There are no confirmed gravity launching flyers, interestingly 
enough. The reason for this has to do with the details of wing vorticity - 
which depends on additional factors beyond velocity.

Cheers,

âMike Habib