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A boomerang is like a propeller
The two wings of a boomerang are arranged so that the leading edges are facing in the same direction, like propeller blades. Propellers create a forward force by spinning the blades.
If you throw a boomerang, as you do with a Frisbee, you may assume the forward motion would be up, and the boomerang would fly up until it stopped spinning and gravity pulled it down again. If you held it vertically when you threw it, as is proper, it seems that it would fly off to the right or left. But that is not what happens.
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The boomerang the first man-made flying machine
Aborigines of Australia are credited with the invention of the boomerang. They used non-returning boomerangs in hunting, called kylies.
The returning boomerang might be a complete accident or the result of design experimentation. The Aborigines perfected the boomerang design and throwing te...
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Returning Boomerangs
Returning boomerangs are the banana-shaped devices that come back to you when you throw them.
The returning boomerangs are made from lightweight pieces of wood, plastic or similar material and generally measure 1 to 2 feet (30 to 60cm) across. When thrown correctly, a returning boomerang f...
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Why boomerangs fly
A boomerang has at least two wings combined in one unit. It makes a boomerang spin about a central point, stabilising its motion as it flies through the air.
The wings are set at a slight tilt. They have an airfoil design - rounded on one side and flat on the other - which gives a wing lift...
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Why a boomerang comes back
When you throw the boomerang:
- It not only spins propeller motion but also flies through the air.
- The wing at the top of the spin moves in the same direction as the forward motion of the throw, while the bottom wing mo...
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Non-returning boomerangs
Non-returning boomerangs are effective hunting weapons. They are easy to aim and can travel a longer distance at a high rate of speed.
These boomerangs are made from pieces of wood shaped in a curve, but they are usually heavier and longer than the returning boomerang, about 3 feet (1 metre...
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Forces that affect a boomerang flight
There are five variables involved in a boomerang flight:
- 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
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How to throw a boomerang
- Hold the boomerang at the end of the bottom wing, with the V-point pointing toward you, the flat side facing out. The curved edge will be on the left and the top wing's leading edge facing away from you.
- Aim the boomerang at a point about 45 to 50 degrees to one side from the wind di...
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More like this
Forces that affect a boomerang flight
There are five variables involved in a boomerang flight:
- 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
When bad news is from a friend or loved one
Don't:
- Make the pain about you.
- Have a go at them. "Why didn't you...?"
- Spread gossip. If they ask, forward their message verbatim.
- Give them advice.
Instead, ask them:
- What would you like me to d...
He is a weapon
He leaned forward in his chair. ‘May I give you some advice? If you are truly his friend you will help him leave his soft heart behind. He’s going to Troy to kill men, not rescue them.’ His dark eyes held me like swift-running current. ‘He is a weapon, a killer. Do not forget it....
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