You're probably looking for
because you want to find out about a solar-powered aircraft that never has to land. This URL served as a project website while the Tethered Uni-Rotor Network (TURN) system was still in its R&D phase.
Now that the technology passed all the initial technical development hurdles, it's time to start building!
Devorto (Latin for "to turn") is the business entity that was formed to commercialize the TURN aerial platform.
You can find what you're looking for over here: