June 6, 2012
A massive drone known as “Phantom Eye” that can stay aloft for days at a time has completed its first test flight at Edwards Air Force Base in California.
Boasting a 150-foot wingspan, the hyper-efficient Boeing aircraft runs on liquid hydrogen and is designed to remain in the air for up to four days without refueling.
In its test flight last Friday, the drone reached a height of 4,080 feet and a cruising speed of just over 70 m.p.h. The only mishap in the 28-minute flight came when the craft landed on the dry lake bed in the Mojave Desert used for test flights at the Air Force base.