V2

The higher of 1.05VMcA or 1.2 VSR

The higher of 1.1VMcA or 1.25VsR 

 Vs1

Landing distance decreases.

Landing distance increases

Landing distance increases and the ground roll reduces.

Landing distance decreases and the ground roll increase.

Calculated flight performance with a safety factor.

Actual flight performance with a safety factor.

Margin between the net gradient and gross gradient.

Actual flight performance with NO safety factor.

The stall speed or the minimum steady flight speed at which the aeroplane is controllable in 1-g conditions.

The speed at which onset of natural stall warning occurs with the aeroplane NOT exceeding 1-g conditions.

The 1-g stall speed at which the aeroplane can develop lift equal to its weight.

The speed at which onset of artificial stall warning occurs with the aeroplane NOT exceeding 1-g conditions.

Take off distance will increase.

Take off distance will increase by a small amount because the increase in pressure altitude reduces the

effects of the increase in temperature.

Take off available will increase.

Take off distance remains about the same because the increase in temperature cancels out the effect of the

increase in pressure altitude.

minimum power.

maximum endurance.

maximum specific range

critical angle of attack

Stall speed or the minimum steady flight speed obtained in a specified configuration.

Reference stall speed in the landing configuration.

1-g stall speed at which the aeroplane can develop a lift force (normal to the flight path) equal to its weight. 

Reference stall speed in a specific configuration.

the air distance that the aircraft would fly per unit of thrust

the ground distance that the aircraft would fly per kilogram of fuel.

the air distance that the aircraft would fly per kilogram of fuel.

the ground distance divided by air distance.

increase by 10 kt.

increase by one half of the headwind.

 remain unchanged.

decrease by 10 kt.

A Increased flight path gradient to introduce a safety margin on the flight test data.

Actual flight path of the aeroplane reduced by a safety margin.

correction applied to flight path gradient to correct for non ISA conditions.

Flight path of the aeroplane with No safety margins applied.