Aurora Flight Sciences has announced that the triangular wings for its X-65 demonstrator have arrived at its Virginia integration facility:
The X-65 uses a triangular, or delta-derived, planform with modular outboard wing sections that can be reconfigured between test campaigns, allowing engineers to evaluate active flow control performance across multiple sweep angles rather than committing to a single fixed geometry. That modularity is deliberate and goes to the heart of what the program is designed to produce: not just data from one flight configuration, but a flexible platform capable of generating comparative data across multiple aerodynamic setups. The wings are built with embedded effector pathways throughout their surfaces, housing the plumbing and structural provisions needed to deliver pressurized air to the fourteen active flow control effectors that represent the X-65’s core research purpose.
Those fourteen effectors are what makes the X-65 genuinely unlike any aircraft that has flown before at this scale. Active flow control, or AFC, is a concept that aeronautical engineers have studied since the mid-20th century: instead of using physical control surfaces such as ailerons, elevators, and rudders to change an aircraft’s attitude, AFC systems blow precisely directed jets of air over the wing and tail surfaces to reshape the airflow around the aircraft in real time, producing the same pitch, roll, and yaw responses without moving any mechanical components. The concept is elegant and potentially transformative, because control surfaces are among the most mechanically complex, maintenance-intensive, and aerodynamically disruptive features on any aircraft. Removing them eliminates the joints, actuators, and hinge lines that add weight and create drag, and it allows aircraft designers to pursue shapes that simply are not practical when mechanical control surfaces must be accommodated.
The stealth dimension of active flow control is one of the reasons the Air Force Research Laboratory, NASA, Naval Air Systems Command, and the Office of Naval Research are all actively monitoring the CRANE program, as Kent confirmed to National Defense Magazine. The outer mold line of an aircraft, meaning the precise shape of its external surfaces, directly determines its radar cross-section, and current stealth designs must accommodate the joints and hinge lines of conventional control surfaces in ways that create radar-reflecting discontinuities. An aircraft that can achieve full maneuverability with smooth, unbroken surfaces throughout its flight envelope could achieve a lower radar signature than any conventionally controlled aircraft of similar size. That potential application to future stealth combat aircraft gives CRANE a strategic relevance that extends well beyond its immediate research objectives.