A happy accident, huh? In his video , he demonstrates how to fashion a boomerang from three strips of cardboard, by crossing and stapling them together so that they jut radially outward from the center.
But a phenomenon known as gyroscopic precession is the key to making a returning boomerang come back to its thrower. At this point it can be caught carefully. The animation below shows a typical basic boomerang flight. The various stages numbered in the top view can be clicked for more explanation of the principles involved.
Bars Font Awesome Free 5. Envelope Font Awesome Free 5. Facebook Square Font Awesome Free 5. Experience the Magic. Boomerang Information. About Us. Aboriginal Boomerangs. How Boomerangs Work. Contents Why Does It Fly? Why Does It Come Back? How Do I Throw One? How Was It Invented? Why Does It Fly? The leading edges of the two wings face in the same direction, like the blades of a propeller. We know that the boomerang is affected by: The force of gravity The force caused by the propeller motion The force of your throw The force caused by the uneven speed of the wings The force of any wind in the area.
Hold the boomerang with the V-point, called the elbow , pointing toward you, and with the flat side facing out. Hold the boomerang at the end of the bottom wing, with a light pinch-like grip.
This boomerang is designed for a right-handed person -- when you hold it correctly with your right hand, the curved edge is on the left and the top wing's leading edge is facing away from you. It probably won't travel back to you if you throw it with your left hand. If you are left-handed, make sure you get a left-handed boomerang -- one that is a mirror image of the boomerang in this illustration.
Colorado Boomerangs sells a variety of boomerang styles, and the company says that every model is available in a left-handed version. If you are throwing with your left hand, hold the boomerang so that it is tilted to the left, with the curved side facing to the right. A right-handed boomerang will travel in a counter-clockwise circle and a left-handed boomerang will travel in a clockwise circle.
To keep the wind from forcing the boomerang off course, you should aim the boomerang at a point about 45 to 50 degrees to one side from the direction of the wind stand facing the wind and rotate about 45 degrees clockwise or counter-clockwise. Adjust the position of the boomerang depending on how much wind there is. When you have set your grip on the boomerang and you have oriented yourself in relation to the wind, bring the boomerang back behind you and snap it forward as if you were throwing a baseball.
It is very important to snap your wrist as you release the boomerang so that it has a good spin to it. Spin is the most important thing in a boomerang throw -- it's what makes the boomerang travel in a curved path. When you throw the boomerang vertically, the uneven force on the top of the spin tilts the axis down gradually, so it should come back to you lying down horizontally, as a Frisbee would. But don't try to catch it with one hand -- the spinning blades could really hurt you.
The safe way to catch a returning boomerang is to clap it between your two hands. Always be careful when playing with a boomerang, especially a heavier model.
When you throw the boomerang, you must keep your eye on it at all times or it could hit you on the return. If you lose track of its path, duck and cover your head rather than trying to figure out where it is. Boomerangs move quickly, with a lot of force. Boomerang FAQ Do boomerangs come back? There are returning boomerangs and non-returning boomerangs. Returning boomerangs are specially crafted, lightweight pieces of wood, plastic or other material.
Non-returning boomerangs are also curved pieces of wood, but they are usually heavier and longer. What is a boomerang used for? Aborigines used non-returning boomerangs, which they call kylies, extensively in hunting. The Aborigines perfected the boomerang design and throwing technique for the simple pleasure of it, and the boomerang has mostly been used as sports equipment ever since then.
Who invented the boomerang? What does boomerang mean? A boomerang is two wings combined in one unit. With these features in place the boomerang stands out as a rare example of a non-ballistic missile. Most missiles, such as throwing clubs, spears or stones, are ballistic. So are arrows, mortars, artillery shells and a wide range of rockets. That is, they travel in an upwards arc and then come down again.
This means ballistic missiles must be thrust upwards, travelling in a vertically curved path. If a spear was thrown parallel to the ground it would be soon brought down by gravity. The time allowed for its flight on a parallel path is roughly equivalent to the time needed for its free fall, as if dropped.
So, if not for its ballistic path, the spear would barely stay more than two seconds in the air, not nearly enough to travel, as it does, about seventy metres. By contrast, boomerangs fly roughly parallel to the ground and as long as they maintain sufficient speed and rotation, they can resist the force of gravity. There are a few minor technical aspects which increase these self-supporting abilities.
0コメント