Apollo R and the Urban Sky balloon. U.S. investigating fresh stratosphere platform

Zdjęcie: Balon stratosferyczny wynoszący samolot solarny


US Army soldiers combined a high-mountain balloon and an autonomous solar-electric aircraft. Together, they rose to the stratosphere, the second from the bottom of the atmosphere layer, extending at an altitude of about 10-15 km to 50 km above the surface of Earth, where they were tested...