First Glimpse of Jet-Powered VTOL X-Plane Unveiled for DARPA Program

Bell has revealed a new image showcasing its innovative hybrid of helicopter and jet aircraft, offering a glimpse at the future of aviation. The model, used in wind tunnel tests, represents Bell’s entry into DARPA’s Speed and Runway Independent Technology (SPRINT) program.

Traditionally, helicopters excel in vertical takeoff and landing (VTOL) capabilities, especially in challenging terrain, but lack speed. Jet planes, on the other hand, deliver high speed but rely on runways or flat surfaces, even for STOVL models. DARPA’s SPRINT program aims to bridge this gap by developing an aircraft capable of rotorcraft-like VTOL and jet-speed horizontal flight.

Bell’s X-plane, a leading contender in the program, resembles a Bells Boeing Osprey with transformative features reminiscent of a high-tech gadget. After takeoff, its rotor nacelles tilt forward for horizontal flight. Unlike conventional designs, its rotor blades fold into the nacelles to reduce drag, allowing the jet engines to take over seamlessly.

First Look at Bell’s X-Plane: Folding Rotor Tests and Streamlined Design Unveiled

The folding rotor mechanism underwent successful testing in 2023 at the Holloman High-Speed Test Track in New Mexico, followed by wind tunnel trials at Wichita State University’s NIAR, revealing the X-plane’s streamlined hull, thin wings, V-shaped tail, and nacelles with folding rotors shielded by aerodynamic fairings.

Bell’s technology demonstrator, a pilot-optional craft, will cruise at up to 450 knots (518 mph), with a 200-nautical-mile range, 30,000-foot ceiling, and 5,000-pound payload capacity—enough to carry a small vehicle.

Designed to enhance speed, range, survivability, and maneuverability, the aircraft will particularly benefit special forces in the Indo-Pacific. “This groundbreaking Stop/Fold system will revolutionize vertical lift aircraft,” said Jason Hurst, Bell’s Executive VP of Engineering.

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