Boomerang also called boomerang, it also has a more cool name - boomerang. As the name suggests, is to fly back'll fly back. It is also Australia's Aboriginal hunting tool. Boomerang around the arc orbit, without the use of other tools in the shortest time to fly the longest distance.
Boomerang shape can be divided into "V" shaped, cross-shaped and triangular shapes. Its branch wing section to make boomerang suffered air lift to rise, so that the body of stability. And airplanes or helicopters when the propeller began to rotate completely still different, in addition to throwing out boomerang spiral rotation movement, but also the completion of the air action.
Boomerang per one rotation, the direction of movement of the upper flap are throwing in the same direction, and the direction of motion of the bottom flap and throw in the opposite direction. When the upper and lower wings at the same speed of rotation, the boomerang can be faster in the air. When a flap at a faster speed flight, there will be more air flow through the bottom. This phenomenon will produce lift, the flap must exert greater force to offset the increase in quality. This is like someone constantly pushing at the top of the flap as boomerang rotation.
Boomerang and gyros, like a straight line around its axis of rotation. Lift and stability to make boomerang rises, the rotation axis of rotation so that boomerang back to fly. Thus, just as inclined as bicycle wheels, boomerang may be constantly rotated left or right, thereby performing a circular motion, eventually return to the starting point.
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