must be more than 1.1 V_MCA and must provide the max climb gradient.

may not be less than 1.18 V_SR and must provide at least the minimum climb gradient.

may not be less than 1.08 V_S1 and must provide the manoeuvring capabilly.

may not be less than V₂ min and V_R plus the speed increment to screen height.

Higher, because on a wet runway an aircraft requires a shorter distance to stop in the event of an aborted take-off.

The V₁ speed is the same for both runways.

Lower, because aircraft can reach higher speeds on wet runways.

Lower, because on a wet runway an aircraft takes longer to stop in the event of an aborted take-off.

it will decrease

It stays constant, the speeds are almost the same.

it will increase.

It depends on the wind conditions.

when landing gear is fully retracted.

when flap retraction is completed.

when acceleration to final take-off speed (V_FTO) is started.

when acceleration starts from V_LOF to V₂.

As soon as possible after the first wheel has touched down.

Once the main gear has touched down provided you can lower the nose gear safely.

Once all the wheels have touched down.

When deploying thrust reversers with the nose gear firmly on the ground.

81 kt

74 kt

88 kt

71 kt

reduced take-off thrust is allowed on both types of runways.

derated take-off thrust is allowed on both types of runways.

derated take-off thrust is allowed only on wet runways.

A reduced take-off thrust is allowed only on contaminated runways.

increases the climb limited take-off mass.

decreases the take-off distance.

decreases the field length limited take-off mass.

has no influence on the allowed take-off mass.

 1.43 x LDA.

0.7 x LDA. 

1.15 x LDA.

0.6 x LDA.

VNE

Vs

Ммо

Vmo