Physics-Busting Requirements Challenge U.S. Army FARA Program

Sikorsky Raider X with two Defiants
The Sikorsky Raider X, pictured escorting two Defiants, is designed with a coaxial rotor and a pusher propeller, which requires a large transmission.
Credit: Sikorsky Concept
The U.S. Army’s project manager now says the original set of performance requirements for a future rotorcraft that represents the aviation branch’s top modernization priority are not compatible with the laws of physics. Moreover, the original schedule set for the competitive flyoff of the Future...

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