История изменений
Исправление atsym, (текущая версия) :
А тут они «оказались в нужное время в нужном месте».
http://www.perlanproject.org/science
HOW WE GET TO THOSE ALTITUDES
To soar a glider to 90,000 feet without an engine – not possible! Yes, it is possible. Steve Fossett and Einar Enevoldson soared the Perlan 1 glider to 50,722 feet on August 30, 2006 using “stratospheric mountain waves.” Mountain waves form when winds of at least 15 knots cross over a mountain range perpendicularly and the atmosphere is “stable” waves will form on the lee side of the mountains. A glider uses the upward moving part of this wave system to climb.
http://www.perlanproject.org/sites/default/files/science/clouds.jpg
What sets the Perlan Mission apart from just gliding on mountain waves is that we require one critical additional element to enable us to soar into the stratosphere: The Polar Vortex . The maximum altitude of mountain is usually at the boundary between the troposphere and the stratosphere. This is because the cold air of the mountain wave encounters warmer air at the boundary and cannot rise further. Winds in the Polar Vortex can reach speeds of 260+ knots allowing the mountain waves to propagate upwards into the stratosphere. These are called “stratospheric mountain waves.” The Perlan 2 will use these waves to soar to the edge of space.
Исправление atsym, :
А тут они «оказались в нужное время в нужном месте».
http://www.perlanproject.org/science
HOW WE GET TO THOSE ALTITUDES To soar a glider to 90,000 feet without an engine – not possible! Yes, it is possible. Steve Fossett and Einar Enevoldson soared the Perlan 1 glider to 50,722 feet on August 30, 2006 using “stratospheric mountain waves.” Mountain waves form when winds of at least 15 knots cross over a mountain range perpendicularly and the atmosphere is “stable” waves will form on the lee side of the mountains. A glider uses the upward moving part of this wave system to climb. What sets the Perlan Mission apart from just gliding on mountain waves is that we require one critical additional element to enable us to soar into the stratosphere: The Polar Vortex . The maximum altitude of mountain is usually at the boundary between the troposphere and the stratosphere. This is because the cold air of the mountain wave encounters warmer air at the boundary and cannot rise further. Winds in the Polar Vortex can reach speeds of 260+ knots allowing the mountain waves to propagate upwards into the stratosphere. These are called “stratospheric mountain waves.” The Perlan 2 will use these waves to soar to the edge of space.
Исходная версия atsym, :