Material preparation: twigs and ropes.
1, collect some twigs and fold them into appropriate lengths, depending on the object to be captured, such as dealing with turtledoves and pigeons, which are generally above 30cm, as shown in the figure.
2. Find two ropes and tie two sticks, as shown. The length of the rope is about 1.4 times the length of the stick (diagonal length of the square). As shown in the figure.
3. Turn one of the sticks to make the rope diagonal, as shown in the figure.
4. Find two sticks and buckle them on the rope like the other two sides of the square, as shown in the figure.
5. Continue to pile up sticks along the direction perpendicular to the next layer of sticks, as shown in the figure.
6. When the pile is high enough and the rope is tight enough, use more sticks to cap it, as shown in the figure.
7. Find a twig with a fork, as shown in the figure.
8. A bird-catching artifact is ready, as shown in the figure.
Reasons for repelling birds:
Although birds are small and fly slowly, planes are very fast. When birds and planes fly in opposite directions, the relative speed between them will be great. According to the data, a bird weighing 1.8kg collides with an aircraft with a speed of 550km/h, which will produce an impact force of 25 tons, and the aircraft is equivalent to being attacked by shells.
In the past 20 years, 220 people around the world died of bird strikes, which not only brought huge losses and harm to passengers' lives and property, but also caused many indirect economic losses such as flight delays. After all, the safety of passengers is more important than anything else. Bird-to-plane collision is now defined by ICAO as one of the main hazards of Class A air crash.
There are generally two kinds of bird strikes:
The bird crashed into the fuselage of the plane or was sucked into the engine. The latter is the most harmful. After two or more planes hit a bird, they can turn off the damaged engine and use other engines to sail and land. Li Jianying, a famous air force pilot in China, flies a fighter with a single engine, so once the engine inhales birds, the plane will lose power.