Question

What is the velocity at the start of flare maneuver if the approach speed is 130 knots?

(a) 2.91 m/s

(b) 3 m/s

(c) 3.56 m/s

(d) 10 m/s

The question was asked in exam.

My doubt stems from ILS/MLS Coupled Landing System and Automatic Landing in chapter Autopilots and Flight Management Systems of Avionics

Answer 1

The correct answer is (a) 2.91 m/s

The explanation is: Vertical velocity at the start of flare = approach speed x glide slope angle. Thus Vv= 66.87* x sin(2.5°) = 2.91 m/s .      *[converting knots to m/s].