The lower limit of the white arc corresponds to which speed?

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Study for the Pilot's Handbook of Aeronautical Knowledge Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

The lower limit of the white arc corresponds to which speed?

Explanation:
The white arc shows the flap operating range. Its lower limit is the stall speed with flaps extended, because when flaps are down you can fly at slower speeds before the airplane stalls. That speed is VS0. So the lower end of the white arc corresponds to VS0. The other speeds relate to different flight conditions (VS1 is stall with flaps up, VX/VY are climb performance speeds) and don’t define the flap-extended range.

The white arc shows the flap operating range. Its lower limit is the stall speed with flaps extended, because when flaps are down you can fly at slower speeds before the airplane stalls. That speed is VS0. So the lower end of the white arc corresponds to VS0. The other speeds relate to different flight conditions (VS1 is stall with flaps up, VX/VY are climb performance speeds) and don’t define the flap-extended range.

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