A huge drone Google was testing as portion of a project to supply unmanned aircraft instead of satellites to Internet service crashed after it fell upon an updraft and one of its wings neglected, US mishap investigators have concluded.

When it started experiencing management issues, according to a report by the National Transportation Safety Board, the Solara 50 had only lifted off from a distant, desert landing strip in New Mexico on May 1. It hit a thermal updraft that propelled it up and raised its rate, as stated by the NTSB as a distant pilot tried to stabilize the airplane.

In spite of efforts to lessen power, the airplane went quicker than designed and the left wing started to fail. “The aircraft started an uncontrollable and wandering flight path around right ahead in a fast descent,” the NTSB wrote in a simple overview posted on its web site. The report, dated Nov. 19, has not previously been reported.

The right wing also neglected after a section of the left wing came off.

Google did not immediately react to a request for opinion on the report.

It’s a wingspan of 164 feet (50 meters), based on business promotional material. It’s designed to fly over the weather for long stretches, where Internet signs could subsequently broadcast to world as if it was a satellite.

The business is in a race with Facebook, which likewise tried to purchase Titan, to construct new Internet services all over the world.