[youtube https://www.youtube.com/watch?v=4GvreViQLMg&w=560&h=315] The maiden voyage of the Perlan 2, an experimental glider that hopes to eventually reach 90,000 feet, took place in Redmond on Wednesday morning. Eventually, using stratospheric mountain waves, Perlan 2 looks to go as high as 90,000 feet.   Voir aussi https://fr.sputniknews.com/sci_tech/201607201026832399-planeur-airbus-record-altitude/…