DYNAMIC SOARING Meaning and
Definition
-
Dynamic soaring is a technique utilized by birds and other flying creatures, as well as by certain unmanned aerial vehicles (UAVs), to gain energy and achieve sustained flight. This phenomenon is characterized by exploiting the differences in wind speed and direction at different altitudes to generate lift and increase the overall velocity of the aircraft.
During dynamic soaring, the aircraft alternates between different air masses, typically in a vertical or elliptical path. It employs the energy gradient between these air masses to achieve propulsion and increase speed. As the aircraft flies, it navigates between areas of faster wind speed, such as the upwind face of a hill or a wave created by strong winds, and slower wind speed, like the lee side of a hill. This gradient creates a boundary layer, allowing the aircraft to achieve lift and gain energy.
By continually transitioning between these different wind speeds, the aircraft accumulates kinetic energy that can be used for sustained flight. As the airspeed increases, the aircraft gains more lift and can fly longer distances without any additional propulsion, conserving its energy. This behavior is particularly advantageous for the efficient and endurance-focused flight of certain bird species and UAVs, enabling them to soar for extended periods with minimal effort.
Dynamic soaring demonstrates the ingenuity of nature in harnessing the forces of the atmosphere. It serves as an inspiration for engineers and scientists looking to develop efficient and autonomous flying systems that can endure long flights or explore remote areas without relying heavily on external power sources.
Etymology of DYNAMIC SOARING
The term "dynamic soaring" is composed of two words: "dynamic" and "soaring".
1. Dynamic: The term "dynamic" is derived from the Greek word "dynamis" meaning "power" or "force". It entered the English language in the 19th century and refers to something characterized by constant change, energetic action, or continuous motion.
2. Soaring: The term "soaring" originates from the Old English word "sorian" which means "to fly or soar in the air". It has its roots in the Proto-Germanic language and can be traced back to the Proto-Indo-European base "swer", meaning "to move, turn". The word "soaring" has been used to describe the act of gliding or soaring in the air without engine power since the 17th century.
