Solar Impulse 2 (HB-SIB)

Final aircraft (HB-SIB)
• Construction history
Construction of the second Solar Impulse aircraft, carrying the Swiss registration HB-SIB, started in 2011.
Completion was initially planned for 2013, with a circumnavigation of the globe in 20–25 days in 2014. However, following a structural failure of the main spar during static tests in July 2012, a more likely date for the circumnavigation is 2015. The flight would circle the world in the northern hemisphere, near the equator. Five stops are planned to allow changes of pilots. Each leg of the flight will last three to four days, limited by the physiology of each pilot.