Why do boomerangs come back?
Boomerangs
work on the same principles of aerodynamics as any other flying object; the key
to how a boomerang works is the airfoil. An airfoil is flat on one side but
curved on the other with one edge thicker than the other - this subjects the
boomerang to lift, keeping it in the air. The lift is generated because the air
flowing up over the curve of the wing has further to travel than the air
flowing past the flat side. The air moving over the curve travels faster in
order to reach the other side of the wing, creating lift. A boomerang has two airfoils,
each facing in a different direction. This makes the aerodyamic forces acting
on a thrown boomerang uneven. The section of the boomerang moving in the same
direction as the direction of forward motion moves faster than the section
moving in the opposite direction. Just like tank tracks moving at different
speeds, this causes the boomerang to turn in the air and return to the thrower.
Courtesy:
Bymstuff.com
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