The X-76 is the latest in a long series of experimental X aircraft developed by the Defense Advanced Research Projects Agency (DARPA).
DARPA unveiled the X-76 on March 9, 2026. Bell Textron is building the aircraft as part of the DARPA project. Speed and Track Independent Technologies (SPRINT) Program a partnership with US Special Operations Command to address a long-standing challenge in aviation.
For more than a century, aircraft designers have faced a difficult decision. Fast planes need runways and fixed wings, while helicopters and vertical lift planes can land almost anywhere without sacrificing speed.
The X-76 aims to overcome this compromise.
DARPA’s goal is ambitious: build an aircraft that can take off and land vertically from rugged terrain and still fly at more than 400 knots. If successful, this could change the way military aircraft operate in remote or disputed areas.
The experimental aircraft passed a key design review and Bell Textron began building it. Flight tests are planned for later in the program, with a Phase 3 test campaign expected in early 2028.
Beyond track dependency
The X-76 began with DARPA’s SPRINT initiative, launched in November 2023 to find ways to combine the performance of a high-speed fixed wing with true runway independence.
The idea is deceptively simple: design an airplane that takes off and lands like a helicopter but flies at speeds close to those of normal airplanes.
DARPA SPRINT Program Manager Cmdr. Ian Higgins of the US Navy says the airstrips have become a strategic vulnerability.
“For too long, the track has been both a facilitator and a tether, granting speed but creating critical vulnerability,” Higgins said. “With SPRINT, we’re not just building an
We are working to offer the surprise option, the rapid reinforcement option and the life-saving speed option, anywhere in the world, without the need for any clue.
US Navy Commander Ian Higgins
The X-76 will likely use a tiltrotor design, similar to the Bell-Boeing V-22 Osprey and Bell’s V-280 Valor. However, the SPRINT demonstrator aims to advance this idea even further.
Images of the design show that the aircraft can take off and land vertically, hover in challenging environments, and switch to high-speed flight once airborne. The program also looks at features such as foldable or stoppable rotors to reduce drag during high-speed flight.
If it works as planned, the plane could fly between 400 and 450 knots. It is much faster than normal helicopters and even faster than most tiltrotor aircraft in use today.
This means the X-76 could offer the flexibility of a helicopter along with the speed of a turboprop or light aircraft.
A new generation of special operations aircraft
Although the X-76 is just a test model, the technology it explores could have a major impact on future military aircraft.
DARPA considers special operations forces to be the main beneficiary group. These missions often take place in remote or dangerous areas where landing strips may not exist or be at risk. Helicopters are flexible but slow, while fixed-wing aircraft are fast but require suitable airfields.
The X-76 is designed to close this gap.
DARPA program documents suggest a platform that could deploy troops, vehicles or critical equipment directly into austere environments, eliminating the need for traditional air bases. Conceptual images released with the announcement show a wide-body aircraft capable of carrying significant payloads, suggesting uses such as rapid troop insertion, logistics and casualty evacuation.
The name X-76 is also symbolic. The “76” refers to 1776, tying the announcement to the United States’ 250th birthday in 2026.
This project is based on Bell Textron Extensive experience in high speed vertical lifting. The company has worked on tiltrotor aircraft from the XV-3 and XV-15, through the V-22 Osprey and, most recently, the V-280 Valor for the US Army’s Future Long Range Assault Aircraft program.
The SPRINT demonstrator is not intended to become an operational aircraft. Instead, the X-76 will test the aerodynamics, propulsion and flight control ideas needed for high-speed, runway-independent aircraft.
If these technologies work, they could lead to a new generation of military aircraft.
That has always been the role of X-planes in experimental aviation. From the rocket-powered
The X-76 could be the next step in that tradition.
Right now, the plane is mainly engineering drawings and parts under construction. But if DARPA and Bell are successful, the idea of combining aircraft speed with true runway independence could become an operational reality in the not-too-distant future.
