How is take off speed calculated?

Ask the Captain: How is takeoff speed determined?

• Question: When a plane is speeding down the runway, what determines when liftoff occurs.
• Answer: The speed at which the airplane lifts off is determined by the weight, temperature, altitude of the runway and the slat/flap setting.

What is V1 on takeoff?

Definition. V1 is the Decision speed (sometimes referred to as critical engine speed or critical engine failure speed) by which any decision to reject a takeoff must be made. Above V1, the takeoff must be continued unless there is reason to believe that the aircraft will not fly.

What is the speed of flight during take off?

Most commercial planes take off at roughly 160 to 180 MPH, while landings take place at approximately 150 to 165 MPH. As a general rule, airspeed is measured according to the velocity of the plane as it flies through the air.

How is V1 calculated?

A: V1 is the speed by which a pilot must have decided to abort if they are going to stop on the runway. Pilots calculate this value by the runway length, obstacles, temperature, runway slope and the weight of the airplane. The airplane manufacturer provides these performance figures determined during flight testing.

What is the speed for V1?

A: V1 is the speed by which time the decision to continue flight if an engine fails has been made. It can be said that V1 is the “commit to fly” speed. V2 is the speed at which the airplane will climb in the event of an engine failure. It is known as the takeoff safety speed.

How is V1 speed calculated?

Does runway length affect V1 speed?

If runway length is not limiting, V1 can be adjusted to any speed between Vmcg, which is fixed for a given engine takeoff thrust value, and VR which is limited by additive factors over stall speed and Vmca and thus varies with takeoff weight.