Il viaggio senza emissioni di Solar Impulse 2 è ripartito da Tulsa. Sabato alle 11.22 in Svizzera (le 4.22 locali) l'aereo che sta compiendo il giro del mondo con il solo ausilio dell'energia del sole è ripartito da Tulsa (in Oklahoma) in direzione di Dayton (Ohio), dove è previsto il penultimo scalo sul suolo americano.
La tappa dovrebbe durare all'incirca 18 ore. Ai comandi c'è André Borschberg che si alterna in cabina con Bertrand Piccard. Da Dayton Solar Impulse decollerà alla volta di New York da dove prenderà il via la lunga trasvolata atlantica, una delle sfide più impegnative dell'intera avventura di 35'000 chilometri iniziata da Abu Dhabi il 9 marzo 2015.
L'intero giro del mondo, nei programmi iniziali, doveva durare cinque mesi. Il progetto ha però subito uno stop improvviso di 293 giorni alle Hawaii a causa di un guasto alle batterie avvenuto nel corso dell'attraversata del Pacifico che aveva richiesto cinque giorni e cinque notti di volo senza sosta al pilota.
Diem/ATS
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