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Why is FBW essential in stealth aircraft?

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Why is FBW essential in stealth aircraft?

(a) FBW system damps radar energy

(b) Improves control

(c) Reduces engine noise

(d) Disturbs tracking techniques used by missiles

The question was posed to me at a job interview.

My question is from Fly-By-Wire Technology in chapter Fly by Wire Flight Control of Avionics

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Correct option is (b) Improves control

The best explanation: Stealth configurations and requirements can conflict with aerodynamics requirements and FBW flight control is essential to give acceptable control and safe handling across the flight envelope. An example of such is the American fighter F -117, nicknamed “Nighthawk”. It is almost impossible to fly this aircraft without feedback FBW system.

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