In the future, an unmanned helicopter will search for people trapped in fallen buildings or investigate contaminated terrain. The mini-helicopter will be powered by a very light fuel cell that weighs only 30 grams and has an output of 12 watts.
In the future, an unmanned helicopter will search for people trapped in fallen buildings or investigate contaminated terrain. The mini-helicopter will be powered by a very light fuel cell that weighs only 30 grams and has an output of 12 watts.