Solar Impulse Has Made It to Tulsa
Solar Impulse has chalked up another 1,000 miles in its bid to circumnavigate the globe. The all-electric solar-powered airplane successfully flew from Phoenix to Tulsa, landing in the dead of night.
The flight took just over 18 hours, with the airplane-under the control of Bertrand Piccard-managing to hit an average speed of just 54 mph. The airplane uses 17,000 solar panels on its wing to charge 2,077 pounds of lithium battery, so there's a lot of weight to carry, hence the slow speeds.