Product Name: Lightning Fighter
Product Code: FJ602-618
Size: 395*330*175 mm
Weight: 120g
Material: foam + plastic accessories + wire + rubber bands.
Packing: 144pcs
Box Specification: 830*440*690mm

Scientific Enlightenment:

An aircraft is a heavier-than-air vehicle that is capable of sustaining itself in flight by generating lift due to airflow over its fixed wings. It is often categorized as a fixed-wing aircraft. By the type of engine used, it can be further divided into jet aircraft and propeller aircraft. The invention of the airplane is widely recognized as one of the greatest achievements of the 20th century. It is widely accepted that the Wright brothers, Americans, invented the airplane. Their flight on December 17, 1903, recognized by the Fédération Aéronautique Internationale (FAI) as the first sustained and controlled flight by a heavier-than-air aircraft, is widely recognized. That same year, they founded the Wright Flyer Company. Since the invention of the airplane, it has become an indispensable means of transportation in modern civilization. It has profoundly changed and influenced people's lives, opening the history of conquering the blue sky.

Science Project:

1. Recognize and prepare the necessary materials for the experiment.
Step 2: Install according to the instructions in the manual.
3, Install and debug.

Scientific Principles:

The physical principle of elastic band powered aircraft is that when the elastic band is twisted in the opposite direction (doing work on the elastic band), it is gradually stretched, and the elastic band accumulates the rebound force of contraction, which drives the propeller to rotate (doing work on the propeller). This makes the aircraft fly. The working principle of the propeller and the aircraft is based on the principles of aerodynamics.
First, let the rubber band deform to acquire elastic potential energy, and then the elastic potential energy of the rubber band is converted into the kinetic energy of the airplane.

Science Expansion:

How to make the rubber band powered airplane fly longer?
1. Reduce the weight of the aircraft structure. Remove some redundant materials from places where the structure is not required to be too strong.
2. Use stronger and more elastic rubber bands.
3. Reasonably set the wings to ensure the angle of attack and the symmetry of the two wings. Asymmetric wings can easily cause the airplane model to flip during flight and land prematurely. When the angle of attack is large, lift is greater, but drag is also greater. Reasonably adjust the angle of attack to make lift and drag harmonious.
4. When releasing the airplane model, it is important to pay attention to the angle and force. If the angle and force are appropriate, it will fly farther.

   After the baby is completed, you can learn to control the flight attitude by debugging. Please note to follow the introduction in the manual to first test the flight with low power, and then try with high power. Be careful to prevent collisions and falls, and choose a safe and open area. Flying is not suitable in strong wind. 

1. Inspect the model 

Looking directly at the model head, a well-installed model should be free from distortion and symmetrical left to right.

Section Two: Model Adjustment 

In the absence of wind or with a light breeze, hold the center of gravity of the drone's body and gently throw the model. Adjust the distance between the wings and the tail as the model's flight attitude changes. A wavy flight pattern indicates that the head is too light, and you need to move the wing forward; a downward dive indicates that the head is too heavy, and you need to move the wing rearward.

Section Three: Powered Flight 

First, wind the propeller clockwise about 15 times, then hold the model with your right hand and support the propeller with your left hand, gently pushing it into the wind. Observe the flight trajectory, and a spiraling ascent is preferred. If the model's spiraling radius is too small, cut a small hole at the root of the vertical tail and bend it in the opposite direction. After the flight attitude is normal, wind the rubber band 200 to 220 times for large power flight. 

Rubber bands should generally be kept straight and slightly relaxed. Whether to oil them or not is a personal choice; oiling them might make them slightly smoother to turn, but it will shorten the lifespan of the rubber bands.
The key issue is to adjust the center of gravity of the plane. The method is to not tighten the rubber band and to throw it directly from your hand in a windless environment. The plane should neither have obvious elevation nor obvious depression. If it elevates, add weight to the nose. Additionally, it is necessary to pay attention that the plane should not have any side tilt. If it does, adjust the wings to correct it.
When playing, it's generally best to throw the plane into the wind, with a light hand. Especially when the wind is strong, if you apply too much force, the plane will do a somersault and the flight time will be shortened.