The helicopter hovered in the air and nodded goodbye to the veteran?

That's right. Recently, officers and men of a certain land and air brigade of the 8 1 Group Army participated in an air show celebrating the founding of the China * * * Production Party, giving a unique flight training performance to the retired veterans. The helicopter hovered in the air and "nodded" over the veterans to pay tribute to them; In the spirit of "living up to Bayi and striving for the first place", the formation formed the word "Bayi" and flew by.

According to reports, hovering refers to the state that the helicopter keeps its course at a certain height and the landmark position remains unchanged. This flight characteristic of helicopter can not only meet the needs of various operations, but also expand its application scope.

Whether it is the roof platform of a high-rise building or the narrow flat land of a mountain canyon, it can take off and land freely and carry out various operations.

Generally speaking, helicopters need to hover during aerial photography, sightseeing, aerial advertising and other operations, which is also the unique flight state of helicopters different from general fixed-wing aircraft.

The principle of helicopter hovering

Helicopters can fly by the lift generated by the rotation of the rotor. When it flies in mid-air, the lift generated is just in balance with its gravity, so the helicopter can stay in the air, neither forward nor backward.

The most difficult thing in hovering is to control the steering column to keep the longitudinal and lateral movements of the helicopter unchanged, thus stabilizing the helicopter. A helicopter equipped with a twin-blade rotor system is relatively simple to operate.