Page 38 - The Origin of Birds and Flight

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DELAYED STALL ROTATIONAL LIFT FORCE
Fruit flies make use of three separate Basic side vortex
Lift force
aerodynamic mechanisms to stay
Wing rotation
aloft.1 Lateral vortexes arise on the
Wing Wing
wing’s sides during a large portion of beat angle
the wingbeatmotion, thus increasing
Exit vortex
the lift effect. This is known as delayed
stall (2,3,4) As a result of wing move-
ment a rotational lift force arises as the
wings turn consecutive(5). As the wing
rises up, it passes through the air cur-
rent created by the downward beat, and
is directed in such a way that the current creates a lifting force. This is known as catching the
wind.

system works exceedingly quickly. For example, flies can change direction by
reacting to alterations in visual images in as short a time as 30 microseconds.
Dickinson sets out his conclusions in the face of this discovery:
Flies are the most accomplished fliers on the planet in terms of aerodynam-
ics. They can do things no other animal can, like land on ceilings or inclined
surfaces. And they are especially deft at takeoffs and landings—their skill
far exceeds that of any other insect or bird. The halteres, beating out of
sync with the forewings, are the key to the fly’s aerodynamic prowess.
Remove a fly’s halteres, and it becomes unstable and quickly crashes to
the ground. 5
Flies’ flight systems have served as models for modern-day helicopters,
but are actually far superior to those helicopters. How did this immaculate sys-
tem emerge so perfectly in such a tiny creature? Evolutionists give no consist-
ent reply. Even a single fly is clear evidence of creation. The superior creation
that Allah manifests in this minute insect is just one example of His infinite
knowledge. The British biologist J. Robin Wootton makes this
admission regarding the dilemma that the
fly’s superior design poses
for evolutionists: