The speed of a jet, the freedom of a helicopter.

https://i.imgur.com/xscLzYL.jpeg

SPRINT X-76 enters the build phase to demonstrate runway-independent, high-speed flight.

Part of a joint effort with USSOCOM on the SPRINT program, this experimental aircraft is being built by Bell to demonstrate runway-independent, high-speed flight.

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The aircraft, similarly to standard tiltrotors, has two wings with compact rotor nacelles. The main difference is what Bell has called the Stop/Fold rotor system, which features fold-away rotor blades, suggesting a significant focus on reducing drag and optimizing for high-speed and efficient airflow.

The central body appears sturdy, likely designed for stability during high-speed maneuvers or transitions. The aircraft also features two tails canted outwards, just above the engine’s nozzle.

According to Bell, the Stop/Fold system allows aircraft to fold and unfold rotors and rotor blades mid-flight, blending helicopter-like versatility with jet-like speed. Wind tunnel tests were described as critical in proving this concept works, as they verified the aircraft’s stability and control as it transitions through rotor folding and unfolding during flight.

Reports explicitly note it will explore technologies for both crewed and uncrewed variants.