Two aircraft are competing to be the Army’s next Black-Hawk-type helicopter. Here’s what we know about one of them.
called the Future Long-Range Assault Aircraft program. The winner should be announced in 2022.
Here’s what to know about how the Defiant works, and how the design informs what it should be able to do. Right away, its appearance sets it apart from a regular helicopter. The most eye-catching feature is at the top, where two stacked rotors spin in opposite directions for maximum lift. This coaxial setup means that the whirlybird doesn’t need a traditional tail rotor, which exists to keep a regular helicopter from spinning around in dizzying circles in response to the motion of that top rotor.
Crucially, the Defiant’s top rotors are rigid enough to prevent them from colliding and causing a disastrous failure. That’s different from the rotor blades at the top of a regular, which has a “fully articulated rotor system—it flaps up, flaps down, leads forward, lags back—so it’s constantly moving, adjusting in the air,” says Jay Macklin, the business development director for Future Vertical Lift at Sikorsky.
Since this aircraft would need to quickly deploy troops in an area that might be unfriendly, getting in and out quickly is key. The propeller in the back helps with that; it can push the craft quickly through the air and even help it slow down, too. That allows the craft to accelerate or decelerate without tipping forward or backward as a Black Hawk would; as one of those choppers lands, for example, its nose flares up, and its nose pitches down as it accelerates.
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