At the end of 2018 Sikorsky and Boeing unveiled the SB>1 DEFIANT helicopter they have jointly developed for the US Army’s Joint Multi-Role-Medium Technology Demonstrator programme.

The DEFIANT is designed to fly at twice the speed and achieve twice the range of today's conventional helicopters, offering advanced agility and manoeuvrability. Data from the programme will help the army develop the requirements for new utility helicopters expected to enter service from the early 2030s, as part of the service’s Future Vertical Lift programme.

The Sikorsky/Boeing SB>1 DEFIANT will defy conventional wisdom in helicopter design and performance, according to some observers. (Photo: Lockheed Martin)

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