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Re: Ornithurine diversity
A sudden sharp transverse translation of the leading edge can also be used
to shed a leading edge vortex and establish full circulation within about
half a chord length of wing travel rather than the 2 to 2.5 chord lengths
that are usually required. Another comment or two inserted below.
----- Original Message -----
From: "Michael Habib" <email@example.com>
Sent: Saturday, July 12, 2008 6:34 PM
Subject: Re: Ornithurine diversity
Some of the more critical burst-launch characteristics
On Saturday, July 12, 2008, at 02:49 PM, john bois wrote:
Pigeons (for example) have an amazing capacity for getting high raipdly
(hippies take note!).
About 490 feet per minute (2.5 meters/sec)
because they can lift off more quickly they can escape predators that
would catch fanless birds.
Don't count on the fanning tail to help get them above the height that a cat
can leap any quicker than a fanless bird could do it. Rather, count on the
fanning tail to improve their overall angle of climb for a somewhat