Which parameter defines the RAT deployment maximum speed?

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Study for the SkyWest ERJ 175 competency exam. Utilize flashcards and multiple choice questions, each with detailed explanations. Be fully prepared for your assessment!

Multiple Choice

Which parameter defines the RAT deployment maximum speed?

Explanation:
RAT deployment speed is limited by the airplane’s overall flight envelope, which is defined by the maximum operating limit speed, VMO/MMO. The Ram Air Turbine must deploy and operate within this envelope, so its maximum deployment speed cannot exceed VMO/MMO. Other speeds refer to different limits: VFE 1 is the flap-extended speed, V window is a configuration-specific speed range, and Vb is a gust/maneuvering speed—none of these set the RAT’s deployment boundary.

RAT deployment speed is limited by the airplane’s overall flight envelope, which is defined by the maximum operating limit speed, VMO/MMO. The Ram Air Turbine must deploy and operate within this envelope, so its maximum deployment speed cannot exceed VMO/MMO. Other speeds refer to different limits: VFE 1 is the flap-extended speed, V window is a configuration-specific speed range, and Vb is a gust/maneuvering speed—none of these set the RAT’s deployment boundary.

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