Page 136 - The Origin of Birds and Flight

134 The Origin of Birds and Flight

Models of planes, rockets, cars, and even bridges and buildings are
first tested in such wind tunnels, in which they are exposed to air cur-
rents adjusted to the speed of the experiment. By observing the behavior
of these models in the streamline flow, necessary adjustments are made
to give the model a more aerodynamic shape.
Aerodynamics comprises a wide range of disciplines, from aviation
and space research to the automobile industry and civil engineering. For
example, in order for a new car to be economical and expend less fuel, a
model of it is first tested in a wind tunnel, and engineers try to find the
aerodynamic shape with the least resistance. Birds’ unique and flawless
properties, which exhibit the principles of aerodynamics, amaze scien-
tists. They fly perfectly, with no trial and error and with no need for any
subsequent adjustments.

Planes undergo thorough maintenance before and after every
flight. Dozens of mechanics join forces to do this. Bearing in
mind that the slightest oversight could cause a plane to fall
out the sky, it is clear how many details need to be considered.
Birds, on the other hand, carry out this maintenance them-
selves. Using their beaks, they oil their feathers from oil
glands at the base of their tails. This intelligent behavior is in-
spired by Allah.