The conversation between human and AI assistant.
How fast does a 747 need to go to take off?
How do pilots know when they've reached the necessary speed for takeoff?
The pilot relies on a combination of instruments to determine when the plane has reached the necessary speed for takeoff. These instruments include the airspeed indicator, which displays the plane's velocity relative to the air around it, and the vertical speed indicator, which displays the rate at which the plane is gaining altitude.