The autonomous solar power Skydweller aircraft is capable of nearly perpetual, safe flights in all conditions.

Solar Impulse is a Swiss aircraft designed for long-range flights, traveling under the power of nothing more than sunlight, and it's gearing up to complete a flight around the world in 2015.

The modules provide solar power to a specially adapted Zenith 750 aircraft – the “electric Sky Jeep.” This prototype has a 30kWh battery, which is enough for a 30-minute flight. According to ...