Or you put solar panels on the wings. Solar planes that charge during the day and stay aloft on batteries at night, for aircraft (drones and such) that you want

Or you put solar panels on the wings. Solar planes that charge during the day and stay aloft on batteries at night, for aircraft (drones and such) that you want to keep in the air for a long time. Not a new idea: http://en.wikipedia.org/wiki/Electric_aircraft http://en.wikipedia.org/wiki/Electric_aircraft