Birds do not follow common kinetic rules

The plane speed has long been limited by simple dynamics laws, related to altitude, wingspan . But recent research shows that birds seem to have broken those rules.

The maximum flight strength of the smallest insects and the largest aircraft has long been largely determined by scientists on body mass and in the size of the wings. However, it seems that nature is not so simple.

Animal ecologist Thomas Alerstam at Lund University in Sweden and colleagues, collected radar data on the flight rates of 138 birds, from heavy birds to less than heavy swans to heavy swans. a dozen sign.

People do not fully understand the flight mechanism of birds, so it is not possible to create "iron birds" better than them.(Photo: Airlords.com)

The study found that differences in speed between birds are large and small, not so much as the laws of dynamics have shown. They argue that evolution has forced birds to choose the type of speed that best suits their lifestyle. For example, large birds that can fly more slowly than humans predicted by flying fast can increase inconvenience, "especially during takeoff, gliding and landing," Alerstam explained.

Birds with family names often have similar flight speeds, regardless of their weight or wing size, supporting the notion that evolution affects flight speed. For example, birds of prey often fly slower than expected, while birds sing faster than expected.

Scientists surmise, the shape of the wings and how to flap their wings can play a more important role than size and weight.

T. An