19 / 20

A multi-engine turboprop aircraft with a max take-off weight of 5300 kg is under performance class B. Given the following speeds, what is its VR and V2.

VSO: 63 kt
VS1: 69 kt
VS: 77 kt
VMC: 70 kt

  • A
    VR: 95 kt, V2: 102 kt
  • B
    VR: 85 kt, V2: 92 kt
  • C
    VR: 69 kt, V2: 76 kt
  • D
    VR: 76 kt, V2: 83 kt

This question requires knowledge of the following rules of class B take-off speeds for a multi-engine aircraft:

VR - The rotation speed, must not be less than:

  • 1.05 VMC
  • 1.1 VS1

V2 - The take-off safety speed, must not be less than:

  • 1.1 VMC
  • 1.2 VS1
  • A speed that is safe under all reasonably expected conditions.

These speeds should be committed to memory for the exam, as they will not be found in CAP 698. Thankfully, there is a nice progression to the speeds, which does make them much easier to remember.

VMC is the minimum control speed (air).
VS1 is the stall speed for the given configuration, (VS0 is landing config.)

Therefore, in this question, the rotation speed (VR) must be the highest of:

  • 1.05 x 70 kt = 73.5 kt
  • 1.1 x 69 kt = 75.9 kt - rounded up to 76 kt

The take-off safety speed (V2) must be the highest of:

  • 1.1 x 70 kt = 77 kt
  • 1.2 x 69 kt = 82.8 kt - rounded up to 83 kt

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.

  • Austro Control
    89
  • Germany
    31
  • Spain
    31
  • France
    29
  • Poland
    20
  • Sweden
    15
  • Greece
    14
  • Czech Republic
    12
  • Portugal
    11
  • Romania
    8
  • Hungary
    7
  • Finland
    6
  • Ireland
    6
  • Malta
    6
  • Italy
    5
  • Norway
    4
  • Denmark
    3
  • Latvia
    3
  • Lithuania
    3
  • Luxembourg
    3
  • Switzerland
    3
  • Croatia
    2
  • Iceland
    2
  • Belgium
    1
  • Bulgaria
    1
  • Estonia
    1
  • Slovakia
    1
  • Thailand
    1
  • United Kingdom
    1
Keyboard Shortcut Use Keyboard Shortcuts