The takeoff speed of an aircraft varies depending on several factors, including the type and size of the aircraft, its weight, the atmospheric conditions (temperature, air density, wind), runway length, and the specific takeoff procedure.
Generally, commercial jetliners, such as Boeing 737 or Airbus A320, have takeoff speeds ranging from around 130 to 180 knots (150 to 210 mph or 240 to 330 km/h). However, these speeds can vary based on the factors mentioned above. Smaller aircraft, such as regional jets or turboprops, may have lower takeoff speeds.
It's important to note that the takeoff speed is not a fixed value, but rather a range. Pilots calculate and determine the exact takeoff speed based on the aircraft's weight, runway length, and other relevant factors prior to each takeoff. This ensures that the aircraft reaches the required speed for a safe and successful takeoff.