Unlike the V-22 Osprey Tiltrotor, where the entire engine and exhaust tilts upward, on the V-280 Valor, just the engine tilts up, enhancing stability. Credit: Bell Helicopter.

Bell is preparing to demonstrate the autonomous flight capability of its V-280 Valor advanced tiltrotor, under the US Army’s Joint Multi Role precursor to the Future Long-Range Assault Aircraft (FLRAA) program.

The demo will showcase the capability designed into the V-280’s fly-by-wire flight control system to fly the aircraft autonomously from vertical takeoff through transition to wingborne cruise and back to a rotorborne vertical landing, Aviation Week reported.

“We have released the autonomous build of the software and just loaded it into the aircraft,” Ryan Ehinger, Bell’s V-280 program manager, said Dec. 12. The aircraft has been flying with the software for the past week, performing regression testing. The next step will be envelope expansion.

“We have not flown autonomously yet. We will do that in the next couple of months,” he said, speaking during a media tour of Bell’s Flight Research Center here in Arlington, Texas.

The autonomous flight demo — which will be limited to taking off, flying a pattern around the airport and landing with a safety pilot on board — will be conducted under a year-long extension to the Joint Multi Role Technology Demonstration (JMR TD) program.

For Bell and the rival Sikorsky/Boeing SB-1 Defiant team, the Army’s extension of JMR TD bridges the gap to the start of a two-year concept definition and risk reduction (CDRR) phase for FLRAA, scheduled for award in March 2020.

The competitive CDRR phase is planned to lead to award of an engineering and manufacturing development contract for FLRAA, which is intended to replace the Army’s fleet of UH-60 Black Hawk utility helicopters beginning in 2030.

So far, the V-280 has flown over 300 knots true airspeed in forward flight mode, has logged over 150 hours of flight and 225 hours of rotor-turn, has completed 50-degree banked turns and has climbed 4,500 feet per minute and sustained flight at an altitude of 11,500 feet.

It has also flown over 370 miles in a single flight ferry and also most recently completed open-door fast-rope demonstrations.

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