Definition
The speed at which an aircraft completes the takeoff phase, having reached a safe height above the runway with the landing gear retracted, the wing flaps in the en route position, and the engines operating at their maximum continuous thrust setting. It is the speed at which the airplane transitions from takeoff configuration to the climb segment of flight.
Plain English
It is the speed the airplane is flying when the takeoff is officially over and the normal climb begins. By this point the gear is up, the flaps are set for cruising, and the engines have been pulled back from takeoff power to a setting they can hold for a long time.
Context Anchor
Seen in aircraft performance and certification discussions, especially for multi-engine takeoff climb planning.
Derivation
Final comes from the Latin finis, meaning “end” or “boundary.” That helps here because this speed is tied to the end of the takeoff path, not the start of the takeoff roll or the moment the wheels leave the runway.
Why Pilots Care
It sets the minimum runway distance required and confirms the aircraft can safely climb after liftoff.
Intuition Check
Final takeoff speed does not mean the speed just before liftoff. It means the speed reached at the end of the certified takeoff path, after the airplane is configured to continue climbing.
Example Sentence 1
Once the airplane reached final takeoff speed, the crew set maximum continuous thrust and continued the climb to cruise altitude.
Example Sentence 2
Once the airplane reached final takeoff speed the pilot rotated and established a climb.