Solar Impulse has completed the second leg of its journey to fly across the United States powered only by the sun.

Solar Impulse has completed the second leg of its journey to fly across the United States powered only by the sun.

The Solar Impulse has broken its own record for the longest distance flight of a solar-powered aircraft following the second leg of its journey across the USA. Solar Impulse touched down in Texas at 1:08 a.m. local time after a flight of 18 hours 21 minutes having covered at least 868 miles (1,397 km). Two different distances have been reported for the flight. The Solar Impulse website says the flight “amounted” to 868 miles (1,397 km). However, according to a Phys.org report, Solar Impulse covered a distance of 1,541 km (which it rounds to 950 miles, though this is not the precise conversion).

It is thought the two distances exist because the plane actually lost ground during part of its flight due to headwinds.

A solar-powered airplane landed safely in Phoenix today on its first leg of an attempt to fly across the United States.

A solar-powered airplane landed safely in Phoenix today on its first leg of an attempt to fly across the United States.

I totally support this effort to develop new technology, but must note that the capabilities of this solar-powered plane, as described in this article, are woefully limited. Nonetheless, I can see many applications where these liabilities will not be an issue, so all power to them. I hope they succeed.