US Military Going Beyond Helicopters

The Sikorsky–Boeing SB-1 Defiant is built and will make its first flight early in 2019.

The SB-1 Defiant will have a cruise speed of 250 knots (460 km/h). It will initially will have less range due to using the “old” T55 engine. A new engine, the future affordable turbine engine (FATE), will enable it to meet the range requirement of 229 nmi (424 km).

The Bell V-280 Valor is competing for the Future Vertical Lift program. In October 2018, the V-280 reached 250 knots (460 km/h) at 80% proprotor cruise speed. It was also flown to a 45° bank angle at up to 200 kn (370 km/h), achieved a 4,500 ft/min (23 m/s) climb rate at 160 kn (300 km/h), exceeded 200 kn (370 km/h) with less than 50% torque, and recorded a peak load factor of 1.9g. Its longest flight covered 270 mi (230 nmi; 430 km).

The V-280 is designed for a cruising speed of 280 knots (320 mph; 520 km/h). It will have a top speed of 300 knots (350 mph; 560 km/h), a range of 2,100 nautical miles (2,400 mi; 3,900 km), and an effective combat range of 500 to 800 nmi (580 to 920 mi; 930 to 1,480 km). Expected maximum takeoff weight is around 30,000 pounds (14,000 kg)


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