So many saw a boomerang only in the movies. There is one mistake in this scene.
If a boomerang hits something, it will not go back. He will bounce off the subject or, as in the film, from the villain and fall to the ground, like any throwing weapon.
Boomerang as a species of throwing baton
In fact, a boomerang is a type of throwing baton. Such batons have been known for 10,000 years. Archaeologists find them in the burials of Ancient Egypt. Hopi Indians from Arizona recently used throwing batons to hunt rabbits.
Who invented the boomerang?
Australian aborigines invented a boomerang - a throwing weapon that, after a throw, returns to the person who threw it. But unlike the boomerang that we know and love, no other throwing club will ever return to the person who threw it. The world's only returning missile was invented in Australia. The Australian aborigines, who lived in a primitive tribal system (the first inhabitants of the Green Continent), usually used ordinary non-returning missiles for hunting. But they also invented the returning boomerang.
What were boomerangs used for?
Some scholars believe that Australian aborigines initially used boomerangs to drive seabirds into the net.Others, and, oddly enough, most of them, claim that a boomerang is just a fun toy. The usual boomerang made in the form of a banana can have a length of 40 centimeters to 1 meter. Modern boomerangs, as a rule, are made of plywood, they are very light: 85 - 110 grams. To return to the thrower, the boomerang does not have to be in the form of a banana. It can be in the form of a star, Native American tomahawk and the letter "H".
What force makes a boomerang come back?
The Dutch physicist Felix Hess pondered this question as a young boy. After growing up and diligently studying mathematics and physics at school and university, he wrote a 600-page book about why a boomerang returns to its owner. Hess believes that the boomerang is returning for two reasons. The first is in the form of a boomerang, the second in the method of throwing.
Boomerang Blade Shape
Imagine that the two shoulders of a boomerang curved in the shape of a banana are its wings. Just like the wings of an airplane, their lower surface is flat and the upper one is convex. Such a surface causes the air that flows around the boomerang in flight to create lift. The whole secret is that one “wing” of a boomerang is different from another. The curvature of the curved surface of one wing looks forward, and the other - back. It’s the same as attaching one wing to an airplane backwards. You will not envy the pilot of such an airplane. An airplane, like a boomerang, is organically incapable of flying straight.The shape of the boomerang blades returns it after the flight to the place of the throw.
Throwing method
The throwing method is the second reason forcing the boomerang to describe a circle in flight. The boomerang is held upright before the throw. The flat surface is facing away from the thrower. Then, with a sharp circular motion of the brush, the boomerang is launched into the air. The initial boomerang speed should be at least 10 kilometers per hour, and the rotation speed should be at least 10 revolutions per second. A boomerang thrown with his right hand in flight begins to gradually pick up to the left. Hess suggested that boomerang flying resembles "no hands" cycling. When the housing is tilted slightly to the left, the front wheel also slightly rotates to the left, even if you do not touch the steering wheel.
In the case of the boomerang, the secret to automatically turning it to the left lies in the way that air flows around its blades. The boomerang itself flies forward, but when one blade goes down and back, a thrust is created that pushes the projectile back. This is the force acting on the boomerang from top to bottom, and in this case plays the role of a slight tilt of the body when riding a bicycle. Little by little the boomerang turns to the left. During the flight, he moves from vertical to horizontal and at the end of the flight looks like a small helicopter. A correctly thrown boomerang, having described the circle, falls at the feet of the owner.
