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arevolutionist
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What causes a boomerang return?
Because there's a torque on it. The aerodynamic force exerted on each blade is not equal, since the blades move through the air with different speeds. (While one blade rotates forward, another rotates backward.)giordano bruno said:Yes but what i wonder is whys that the boomerang precess since is a case of balanced gyroscope
I though it was actually a cloverleaf i.e. 4 lobes.Jeff Reid said:Not only do boomerangs return, but some shapes will fly in a figure 8 pattern, if you don't catch it on the initial return, it will fly by and circle in the opposite direction and return again.
The point pretty much is that the thing isn't balanced. One arm is longer than the other, so the centre of rotation is offset from the radius of the bend.giordano bruno said:Yes but what i wonder is whys that the boomerang precess since is a case of balanced gyroscope
I answered that in post #5--there's a torque on the boomerang! (By "unbalanced" gyro I assume you mean a gyro with an unbalanced torque acting on it--that's what causes precession.)giordano bruno said:So my question is if precession only happens only on unbalance gyros how comes it appears in a boomerang that is a balanced one being the COG and axe in the same point
giordano bruno said:The wiki doenst talk too much on the physics of it
Intuitivile you may consider than when it is spinned around its center of gravity there's more mass on one side of the boomerang than in the other but this is false by definition of center of gravity
On the other hand i had a boomerang which was regular not with wind shape and still worked
So my question is if precession only happens only on unbalance gyros how comes it appears in a boomerang that is a balanced one being the COG and axe in the same point
Danger said:The point pretty much is that the thing isn't balanced. One arm is longer than the other, so the centre of rotation is offset from the radius of the bend.
The principle behind a boomerang's return is known as the Bernoulli's principle. This principle states that when air flows over a curved surface, there is a difference in air pressure on either side of the curve. This difference in air pressure creates lift, causing the boomerang to curve and return to its starting point.
The shape and design of a boomerang play a crucial role in its ability to return. A boomerang must have a curved airfoil shape, with one side being convex and the other being concave. This shape creates the necessary difference in air pressure for the boomerang to return.
The shape, size, weight, and aerodynamics of a boomerang can all affect its return. Wind speed and direction also play a significant role. A boomerang may not return if thrown too hard or at the wrong angle, as this can disrupt the airflow and prevent the necessary lift from occurring.
No, not all objects can be made into a boomerang. As mentioned earlier, a boomerang must have a specific curved airfoil shape to create lift and return. Additionally, the weight and balance of the object must be carefully considered to ensure a successful return.
It is believed that ancient civilizations observed birds and their ability to fly and return to their starting point. They then experimented with different shapes and designs until they discovered the curved airfoil shape necessary for a boomerang's return.