KDR

Question 1

Vr relationship to VMCA

Answer 1

Vr must be 1.05x VMCA or greater to ensure directional control can be maintained if a takeoff is continued

Question 2

V2 relationship to Vmca

Answer 2

May not be less than 1.1 x Vmca to ensure directional control in the event of engine failure after takeoff

Question 3

V2 relationship to Vs

Answer 3

May not be less than 1.2 times Vs to ensure adequate separation margin above the stall

Question 4

V speedRelationships

Answer 4

All vmca speeds use 1.05 (Vr) or 1.1(V2)

All speeds related to stall use 1.2Vs (Vmca not greater than, and V2 not less than)