Imagine the first rays of the morning sun shining on a busy airport runway, where a huge plane is quietly parked and ready for its flight journey. It's not just a combination of steel and plastic, it's the culmination of human ingenuity and courage. Before takeoff, pilots perform a series of complex checks to ensure that every part of the aircraft is in top condition. The runway, on the other hand, is the first springboard for the aircraft to take off, which is spacious and flat, providing enough space for the aircraft to accelerate.
Light has two meanings in everyday language, one is small in weight and the other is low in density.
The question asks why does it fly when it weighs so much? There is nothing wrong with the problem.
But the answer to this answer is because of the low density. That's the problem.
Ships float on the water by buoyancy.
But the plane has nothing to do with buoyancy, if there is a little bit, it provides less than 1/1000 of the weight of the aircraft.
For example, an airplane weighs 1 ton, and when it flies, it has less than 1 kgf of air buoyancy, and the remaining 999 kgf is aerodynamic.
It's very simple, the positive and reverse angles of the fan blades of the electric fan (or the positive and negative angles of the propeller) are not clear when you understand a fan blade as a wing? As long as your velocity vector is between the plane of the wing and the direction of the gravity vector, the incoming flow will be deflected by the wing downwards (this is the lower than the ground, not relative to the lower part of the aircraft), the incoming flow itself has no vertical component, and after passing through the wing, the vertical component is generated, then the wing must be subjected to an upward impulse (upper or upward, which is far from the ground, regardless of the state of the aircraft).
In fact, even if the wing is a diamond shape that is symmetrical from top to bottom, it can fly, but it is only less efficient and the attitude is more difficult to control. There is no need to bother with Nobberly.
A lot of people say that fluid mechanics can explain air or something...... But if you do the math yourself, you will find that according to the principles of fluid mechanics, the weight of the aircraft is only about 25% of what it is now...... Moreover, it is difficult for fluid mechanics to explain the force conditions of flight at high speeds.
Bernoulli's law describes the energy relationship in the flow field, just like the conservation of energy, it is the lowest thing, any aircraft can be explained by Bernoulli's equation, which has nothing to do with the shape of the wing.
The first step of Boeing's lift data is to rely on CFD calculations to obtain values that are iteratively obtained, which is not accurate, and this step is mainly to determine the general orientation of the wing.
It is then used for wind tunnel experiments and fine-tuned until at least 6 dimensionless coefficients are obtained, at which point the coefficients are the final result, which can take years.
Isn't that the same principle as swimming with people? People paddle with their hands and legs to gain momentum and buoyancy to move forward.
The airplane is also used, through the engine or propeller to row the air, gain forward momentum and buoyancy, and then fly.
What do you think about this, see you in the comment area