The solar energy can be used not only for cars, but for planes as well. Two Swiss pilots will embark on Monday, March 9th, 2015 on a 250 hours trip with a plane powered entirely by solar batteries. The world-round trip will keep Bertrand Piccard and André Borschberg in a tiny cabin without fresh air and space to stretch at their own will for five months. During this time, they plan to sleep 20 minutes at every four hours, as one of them must be constantly on guard and track the plane’s route.
Besides that, the pilots will try to constantly keep the speed at a half of the plane’s possibillity in order to spare the battery. Engineers say they need a new techlogical leap in order to use solar power for commercial flights.