While looking like the latest and greatest in the USA’s drone arsenal, SolarImpulse 2 is actually a single man plane that is designed to run completely free of fossil fuels.  With solar panels covering all of its 236-foot-long wingspan, and four electric motors that charge on board batteries that let it fly at night, Solar Impulse 2 is preparing to take a five day flight across the Pacific to Honolulu, Hawaii.  

Check it out here.