NASA unveils X-70 Fractal, a crewed X-plane built to be reconfigured fast

NASA has unveiled the X-70 Fractal, a new crewed experimental aircraft meant to test flight-control and other aviation technologies in real flight. The agency showed it on Wednesday at Kennedy Space Center, Florida.

A research jet built around swappable experiments

An X-plane is an experimental aircraft built to test an idea rather than to carry passengers or cargo. NASA describes the X-70 as a high-performance, highly adaptable platform with a pilot on board. The image NASA released is computer-generated, not a photograph of a finished airframe.

The central feature is a flight-control system that can be quickly reconfigured. Flight controls are the systems that turn a pilot’s inputs into movements of the aircraft’s surfaces. According to NASA, this will let researchers study how an aircraft maneuvers in ways that no crewed flight has shown before.

Experiments can ride both inside the airframe and on external mounts, up to 2,000 pounds in total. Being able to exchange them quickly is meant to let teams move from one experiment to the next without long pauses.

The numbers: 10,000 pounds, Mach 0.75, 45,000 feet

NASA gives these design figures for the X-70:

• Takeoff weight: 10,000 pounds
• Cruise speed: Mach 0.75, or three-quarters of the speed of sound
• Maximum altitude: up to 45,000 feet
• Range: more than about 1,726 miles (1,500 nautical miles)

That is a subsonic profile, below the speed of sound. It favors long, repeatable test flights across a wide range of conditions, which is what NASA says it wants the jet for, rather than speed records.

NASA Administrator Jared Isaacman said the agency expects “her first flight under the NASA banner within the next two years.” The release does not say where the aircraft will be based or who will build or fly it.

Why a small, flexible airframe matters to researchers

The payoff for researchers is turnaround time. Large, purpose-built X-planes can take years to design and are tied to a single question. A platform whose controls and payloads can be changed lets engineers test several ideas on one airframe. Laurie Grindle, director of the Aeronautics Division in NASA’s Research and Technology Mission Directorate, said it is exciting to bring on another X-plane to accelerate and drive aeronautics research.

NASA’s hands-on flight research is centered at the Armstrong Flight Research Center in California. NASA named Troy Asher its director on October 29, after he had served as acting director since March. He joined NASA in 2008 as a research test pilot. NASA has not said what role Armstrong will have in the X-70 program.

The newest X-plane already flying is the X-59 quiet supersonic demonstrator, and NASA has published photos of test pilot Mike Lippert preparing to fly it. The two are different kinds of tools: the X-59 is built around one goal, making supersonic flight quieter, while the X-70 is designed to serve many experiments over time.

Joining a line that runs from the Bell X-1 to the X-59

NASA places the X-70 in a lineage that includes the Bell X-1, which first broke the sound barrier in 1947, the hypersonic X-15 and the X-59. With the new aircraft, the agency says it will expand its capacity for experimental flight research, speed up testing of emerging technologies and advance the next generation of American aviation.

Isaacman called the X-70 “just one part of this new beginning for aeronautics,” but the release names no other new programs, budgets or schedules beyond the two-year first-flight expectation. For now, the Fractal exists as a design and a rendering, and the next real milestone is the aircraft itself.