Aircraft pron

April 30, 2016

Here’s a nice picture of Solar Impulse 2 during its flight between Honolulu, Hawaii and Mountain View, California. The flight is part of its circumnavigation of the globe.


This appeared, with 5 other pix, at Popular Science.

The thing that struck me in the article, though, was that this flight took 62.5 hours. If you look up the distance between Hawaii and California, you get (roughly) 2500 miles. That would make the average speed during the flight about 40 MPH.

What type of craft can stay aloft at that slow speed? Was there a continual headwind that added to its airspeed? Or do its long wings just provide incredible lift?

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