There are three things that amaze me-
no, four things that! don' t understand:
how an eagle glides through the sky,
how a snake slithers on a rock,
how a ship navigates the ocean,
how a man loves a woman.
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and R like this.
Rob There' s one thing that amazes me...
How gay are you?
16 hours ago . Like - , 2 people
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E KIM What is this Love malarky?
16 hours ago - Like
M: Well D in answer to one of your queries
today regarding eagles. his important to understand gliding
flight before we begin to talk about flapping wings.
Wings are angled slightly, which allows them to deflect the air
downward and produc... e lift. The slight angle of the wings is
called the angle of attack. If the angle of attack is too great,
the wing will produce a lot of drag. if the angle is too small,
the wing won' t produce enough lift. The best angle depends
on the shape of the wing, but it' s usually E st a few degrees!
Notice that what matters is the angle relative to the direction
of travel, not relative to the horizon.,
The airfoil has a rounded front edge to help reduce air
resistance. Some wings also have a curved or asymmetric
shape that helps deflect the air downward. While not strictly
necessary, this is typical for birds. The inner part, near the
bird' s body, is more curved than the outer part.
The wings flap with an motion. This may
change in special situ ations, but we aren' t going to talk about
those until late r. When the wings move up and down, they are
also moving forward through the air along with the rest of the
bird., Close to the body, there is very little up and down
move merit. Fart her out toward the wingtips, there is much
more vertical motion.
As the eagle is flapping along, it needs to make sure it has
the correct angle of attack all along its wingspan. Since the
outer part of the wing moves up and down more steeply than
the inner part, the wing has to twist, so that each part of the
wing can maintain just the right angle of attack. The wings
are flexible, so they twist automatically.
As the wing twists, and as the outer part of the wing moves
downward, the lift force in the outer part of the wing is
angled fantard. This is what would happen if the whole bird
went into a steep dive. However, only the alng is moving
downward, not the whole bird. Therefore the bird can
generate a large amount of forward propulsive force or
thrust, without any loss of altitude.
The air is not only deflected downward, but also to the rear.
The air is forced backward just as it would be by the propeller
of an airplane.,
if thrust is produced in the downstrait, you might be
wondering what happens in the upstroke. Since the wing is
travelling upward, shouldn' t there be a lot of drag, tending to
slow the eagle down? To avoid this, the eagle does two
The outer part of the wing points straight along its line of
travel so it can pass through the air with the least possible
resistance. In other words, the angle of attack is reduced to
The bird partially folds its wings, which reduces the
wings pan and eliminates the draggy outer part of the wing.
This is not stricly necessary though, and most insects lack
The inner part of the wing is different. There is little
upland- down movement there, so that part of the wing
continues to provide lift and function more or less as it would
when gliding. Because only the inner part of the wing
produces lift in the upstroke, the upstroke as a whole offers
less lift than the downstem . As a result, the eagle' s body will
bob up and down slightly as the bird flies.
Well I hope that helps. Regarding the tth gm w, simple
16 hours ago - Like - , 3 people