What is the aircraft's rotation speed, and will it rotate at the same speed in Denver?

What is the aircraft's rotation speed, and will it rotate at the same speed in Denver?

• A. 95 knots; it will rotate at the same speed in Denver
• B. 95 knots; it will rotate slower in Denver
• C. 90 knots; it will rotate at the same speed in Denver
• D. 100 knots; it will rotate faster in Denver

Answer: (A)

Rotation speed is the indicated airspeed at which you start to lift the nose and rotate for takeoff. It’s set by the wing’s lift needs in the takeoff configuration and weight, so it’s expressed as knots indicated and stays roughly the same for a given weight and configuration, regardless of altitude. In Denver, the air is thinner (density altitude is high), which means you must achieve a higher true airspeed to generate the same lift, but your indicated rotation speed—the speed you’ll rotate at on the airspeed indicator—remains about the same. So you rotate at 95 knots indicated, even though the true airspeed at that moment will be higher and you may need more runway due to performance changes at high altitude.

Rotation speed is the indicated airspeed at which you start to lift the nose and rotate for takeoff. It’s set by the wing’s lift needs in the takeoff configuration and weight, so it’s expressed as knots indicated and stays roughly the same for a given weight and configuration, regardless of altitude.

In Denver, the air is thinner (density altitude is high), which means you must achieve a higher true airspeed to generate the same lift, but your indicated rotation speed—the speed you’ll rotate at on the airspeed indicator—remains about the same. So you rotate at 95 knots indicated, even though the true airspeed at that moment will be higher and you may need more runway due to performance changes at high altitude.