Drones Reach Stratospheric Heights in Race To Fly Higher, Longer

New military and commercial craft aim to go far higher than jumbo jets and stay there for months, offering more flexible alternative to satellites. This month a drone took off from a missile range in New Mexico and climbed into the stratosphere, joining a race to deliver unmanned aerial vehicles that can fly higher and longer than ever before. Drones have already shaken up warfare, recently playing a prominent role in the war in Ukraine. But militaries have long sought craft that can provide intelligence at a height beyond the reach of most radar and missile-defense systems, and for extended periods. For commercial users, high-altitude drones can be a way to beam internet services into areas with low connectivity.

A handful of military drones have for years operated at some 60,000 feet, far higher than jumbo jets. Now companies are developing craft that can go even higher and stay there for months, offering a cheaper and more flexible alternative to satellites. BAE Systems, the British weapons maker that produced the drone that flew in New Mexico, said its solar-powered craft is designed to stay in the air for as long as a year. “It allows us to enter the race to operationalize the stratosphere,” said Dave Corfield, chief executive of Prismatic, the BAE unit that developed the drone. In the recent test flight, the PHASA-35 drone climbed above 65,000 feet and flew for 24 hours before landing. It is expected to enter service as soon as late 2026. Elsewhere, a unit of plane maker Airbus has developed a drone called the Zephyr that has already flown up to 70,000 feet for 64 days.