The aerospace industry is taking a step forward towards sustainable and energy-efficient flight. Switzerland’s Solar Impulse 2 (Si2) marks one of the first solar panel operated aircraft. Based on the HB-SIA prototype, the Si2 spans 236 ft. and weighs 5,070 lbs. This light-weight frame was made possible by the 0.07 oz./sq. ft. carbon fiber and honeycomb material. The solar panels are composed on 17,248 monocrystalline silicon solar cells, which allows electricity to be stored in 1,395 lbs. of lithium-polymer batteries.
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