

Zephyr is the world’s leading Stratocraft. Our current flight-time record is over 67 days in the stratosphere.

means Zephyr is environmentally sustainable
of cutting edge technology.
including the longest ever flight in the history of mankind.

of research, design, prototyping and flying development activities.
of record-breaking stratospheric flight duration, achieved during a 2025 flight.
which is the longest duration for any unmanned HAPS, ever.