The positioning of the Global Hawk is long-term cruising. On the one hand, it is necessary to reduce the fuel consumption of the engine, on the other hand, it is necessary to improve the lift coefficient and use air buoyancy to reduce fuel consumption. This is why the wingspan exceeds 20 meters.
On the other hand, the mechanics of materials tells us that all materials have internal stress, and when it exceeds a certain length, it will break and destroy the structure under the action of internal stress. Therefore, the size of the component can not be infinite, and the relatively simple and rude solution is to strengthen the ribs and change the shape.
But this brings two problems, one is overweight, and the other is increased resistance. This is the case that noodles add more water and noodles add more water.
Laomei relies on the breakthrough of material technology and solves the problems of internal stress and tremor at the same time.
In terms of material technology, we are behind the United States 15 years in metal materials and10-0/5 years in composite materials.