The prototype of the future US Army helicopter is already accelerating to 380 km / h

The Sikorsky-Boeing SB-1 Defiant helicopter is one of two candidates for the right to become the main helicopter of the US Army to replace the outdated UH-60 Black Hawk. During a recent test flight, he was able to accelerate to a speed of 383 km / h. For comparison, its predecessor develops a maximum of 358 km / h and a cruising speed of 286 km / h. Defiant is designed to carry four crew members and up to twelve passengers.

A competitor to the SB-1 Defiant in the Long-Range Army Aviation Development Program (FLRAA) is the Bell V-280 Valor tiltrotor. Program managers will have to select a new medium helicopter that will replace the aforementioned UH-60M Black Hawk and the AH-64E Apache attack helicopter. FLRAA starts in 2022 and ends in early 2030, when the new vehicle is put into service.

SB-1 Defiant

The main requirements of the army for the new helicopter are a higher flight speed and range compared to outdated models, in connection with which the participants in the competition have already proposed a number of new technological solutions.

In particular, the Sikorsky-Boeing SB-1 uses a set of two coaxial main rotor blades, complemented by a pusher tail rotor. As conceived by the developers, the "final" version of Defiant will fly at a speed of 530 km / h.

In turn, the Bell apparatus is a tiltrotor, similar to the V-22 Osprey, capable of turning its wing and propellers for vertical takeoffs, landings and horizontal flights.