Which
would you think are more efficient in the air? Planes or such creatures as
bats, insects, and birds? Believe it or not, the plane is no match for these
small wonders of nature, who “have outstanding capabilities to remain airborne
through wind gusts, rain, and snow.
While
some birds and insects are in flight, their wings are constantly changing shape
to adapt to the environment. This enables them to hover and to perform sharp
maneuvers. When flying at slow speeds, about 1.5 meters per second, the bats
turned their wingtips upside down and quickly flicked them backward during an
upstroke. Scientists have surmised that this trick . . . provides
lift and thrust.”
To
be sure, there is still much to learn about natural fliers. “Physically, what
are they doing to the air to produce such efficient lift? Believe me there is
still more to learn about the nature fliers. There are all kinds of flow
physics we just don’t understand. We can see what birds and insects are doing,
but we don’t understand how that interacts with the air.
Note: Many winged creatures can fly in the
rain, most seek a place of safety.
No comments:
Post a Comment