Boeing's X-65 ditches control surfaces for air jets — if it ever flies
Boeing's Aurora Flight Sciences has reached a major milestone on the X-65, an experimental unmanned aircraft designed to fly without traditional moving control surfaces. Engineers have now mated the wings to the fuselage at a facility in Virginia — a step that puts the program firmly in its integration phase, according to The Aviationist (Jun 2026). Pentagon spending on the effort has crossed $61 million since fiscal year 2024, yet the first flight has already slipped two years to late 2027.
The idea
Every conventional aircraft steers by tilting physical flaps — ailerons, elevators, rudders. The X-65 replaces them with 14 pneumatic nozzles embedded in its wings, a system DARPA calls Active Flow Control (AFC). Those nozzles blast compressed air over the wing surface at high pressure, altering airflow and redirecting the aircraft without any moving parts on the outer skin. The geometry stays rigid; the air does the steering.
The aircraft still carries conventional backup ailerons for early test flights — essentially training wheels to prevent an expensive loss if AFC underperforms. The long-term goal is to lock those surfaces in place entirely and fly on air jets alone.
The wings have arrived — the next big milestone for X‑65! Built at our WV facility, the triangular wings enable active flow control testing across multiple sweeps. Integration is underway in VA as we push toward first flight for the @DARPA CRANE program. pic.twitter.com/w6jhT7ptzI
— Aurora Flight Sciences (@AuroraFlightSci) June 23, 2026
The design
The X-65 looks the part of an experimental machine: a diamond-shaped wing with joined tips, twin vertical tails, and a single jet engine fed by a ventral (belly-mounted) intake. The layout was chosen to maximize exposure of the airframe to varied airflow conditions rather than for aerodynamic efficiency. Wingspan is about 30 feet; maximum takeoff weight is roughly 7,000 lb — comparable in scale to a light military trainer jet. Top speed is around Mach 0.7, or about 500 mph.
The delays
DARPA launched the CRANE program in 2020. Aurora was named sole Phase 3 contractor in January 2024. The first flight was originally set for summer 2025, but cost overruns forced a program pause in early 2025. DARPA and Aurora then struck a co-investment deal in August 2025 to restructure the effort and share costs going forward, per Defense News (Nov 2025). Ground testing is expected in late 2026, with first flight now targeting late 2027.
Why it matters
Removing hinges, seams, and mechanical linkages from a wing reduces radar cross-section — a direct benefit for stealth platforms. It also cuts maintenance complexity; fewer moving parts means fewer failure points in combat. If AFC proves out at this scale, the technology could find its way into next-generation drones and, eventually, manned fighters. The X-65 is a demonstrator, not a production aircraft, but what it proves — or disproves — will shape where the Pentagon puts its money next, notes Interesting Engineering (Apr 2026).