Product Name: KX1917 Graffiti Balance Eagle
Model Number: KX1917
Size: Eagle 200*90*35mm, Rod 6*135mm, Base Plate: 57*3mm
Weight: Approximately 45g
Material: wood + magnets + eyes
Packaging: 600 pcs
Box dimensions: 600*450*550mm
1 Balance Eagle
The Balance Eagle, also known as the Balance Eagle or Pyramid Balance Eagle, is a plastic figurine. In fact, its principle is similar to that of an anti-fall bobble.
2 Principles
1. The eagle’s body is made of plastic, while its beak contains iron particles, resulting in a higher overall weight of the beak. There is a small groove at the tip that supports the body while allowing the beak to slide.
II. The three parts—the two symmetrical wings spread forward and the tail tilted backward—are arranged at a certain angle so that the physical center of gravity of the eagle is located at the beak.
III. Under the same gravitational force and lever principle, we consider the center of the groove at the top of the tower as the support point. Since the distance between the support point and the center of gravity is very close, the lever arm between them is extremely small. The length of the lever arm will not exceed the support range of the groove, allowing the support force at the top of the tower to fully withstand both gravity and the lever force. Thus, with just a slight movement of the eagle, it will sway at the top of the tower like an unsteady object, without falling, until it comes to complete stillness. (Note: The beak of the eagle serves as both the center of gravity and the support contact point, but these two points are not entirely concentrated at the same location.)
A toy that uses a bird's beak to rest on a finger. No matter where you place the bird (on a surface or on a finger), it remains balanced and stable without falling. It can fly just like a real bird.
The reason the balanced bird remains balanced is simply because the actual center of gravity of the entire bird is below the tip of its beak. Although the bird appears to be in mid-air, its wings have very little weight, and the overall center of gravity lies on the fingers. As shown in the diagram, the fulcrum of the finger is point B, while the bird’s center of gravity is at point A—just like a basket hanging from a finger, which allows the bird to stay stable.
