Product Name: KX1917 Graffiti Balance Eagle
Product Code: KX1917
Dimensions: The eagle is 200*90*35mm, the pole is 6*135mm, and the bottom board is 57*3mm.
Weight: About 45g
Material: Wood + Magnet + Eyes
Packing: 600pcs
Box Specification: 600*450*550mm

1 Balance Eagle
The Balancing Eagle, also known as the Balancing Hawk or Pyramid Balancing Eagle, is a plastic ornament that, in essence, operates on the same principle as the traditional Chinese toy called the Unstable Energizer.

2 Principles

1. The body of the eagle is made of plastic, and the eagle's beak contains an iron block, which makes the beak account for a relatively large proportion of the overall weight. There is a small groove at the tip of the tower, which supports the eagle's body on one side and adapts to the sliding of the eagle's beak on the other side.

Secondly, the symmetrical wings that spread forward and the tail that curves backward of the eagle concentrate the physical center of gravity at the beak of the eagle at a certain angle.

III. Under the action of gravity and the principle of the lever, we treat the center of the indentation in the spire as the support point. Since the distance from the support to the center of gravity is very close, the force arm of the support and the center of gravity is very small, and the length of the force arm will not exceed the support range of the indentation. The supporting force at the top of the tower can completely support the weight and the force of the lever, so that when the eagle is lightly moved, it can sway like an unstoppable, until it is completely still. (Note: The beak of the eagle is both the center of gravity and the contact point of support, but these two points are not completely concentrated in the same point).

A toy that uses a beak to balance on a finger. No matter where you put the bird (on a place or on a finger), it can balance stably without falling. It can fly like a real bird.
The reason why the balancing bird can maintain balance is simply because the actual center of gravity of the entire bird is located below the tip of the beak. Although it appears that the bird is completely in the air, the actual weight of the wings is very light, and the center of gravity of the entire body is still on the finger. As shown in the figure, the support point of the finger is point B, and the center of gravity of the bird is at point A, just like a basket hanging on the finger, the bird can be stable and supported.