Most commercial jets take off and land at about the same speed. What is that speed in miles per hour? (margin 20 mph)

While a jet cruises at over 500 miles per hour, its takeoff and landing speeds are significantly slower. The key is generating lift. An aircraft's wings are shaped to create a pressure difference as air flows over them, lifting the plane into the sky. To generate enough lift to overcome its own massive weight, a typical passenger jet must reach a speed between 140 and 180 miles per hour. This is often called the "rotation speed" on takeoff, as it's the point where the pilot can pull back on the controls and lift the nose off the runway.

This speed isn't a single magic number; it's carefully calculated before every flight. Factors like the aircraft's weight (including passengers, cargo, and fuel), air density, and wind conditions all play a role. To help achieve lift at lower speeds, pilots extend devices on the wings called flaps and slats. These panels increase the wing's surface area and curvature, allowing it to generate the required lift much more efficiently, making takeoffs and landings possible on standard-length runways.

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