laskeutumisnopeuden

Laskeutumisnopeuden, or descent rate, refers to the speed at which an aircraft decreases its altitude during the approach and landing phases of flight. It is a critical factor in ensuring safe and efficient landings. The descent rate is typically measured in feet per minute (fpm) and can vary depending on several factors, including the type of aircraft, the weight of the aircraft, the weather conditions, and the specific approach procedure being used.

In general, commercial airliners are designed to descend at a rate of approximately 2,000 to 3,000 fpm during the initial approach phase. This rate may be adjusted based on factors such as wind conditions and the need to maintain a specific airspeed. During the final approach phase, the descent rate is typically reduced to around 500 to 1,000 fpm to allow for a smooth and controlled landing.

The descent rate is carefully managed by the pilot to ensure that the aircraft reaches the runway at the correct airspeed and altitude. A descent rate that is too fast can result in a hard landing, while a descent rate that is too slow can lead to a late touchdown and potential overshoot. Pilots use various instruments and techniques, such as the flight management system and the vertical speed indicator, to monitor and control the descent rate throughout the approach and landing phases of flight.