Home
Back
Rate of Descent Formula:
| From: | To: |
Rate of descent refers to the vertical speed at which an aircraft descends, typically measured in feet per minute. It is a critical parameter for safe approach and landing procedures.
The calculator uses the rate of descent formula:
Where:
Explanation: The formula calculates the vertical descent rate based on the aircraft's ground speed and the glide slope angle, converting the result to feet per minute.
Details: Accurate rate of descent calculation is essential for maintaining stable approaches, ensuring proper glide path adherence, and achieving safe landings. It helps pilots maintain the correct vertical profile during instrument approaches.
Tips: Enter ground speed in knots and glide slope in degrees. Both values must be positive numbers. The calculator will provide the rate of descent in feet per minute.
Q1: What is a typical rate of descent for commercial aircraft?
A: Typical descent rates range from 500-1500 feet per minute, depending on aircraft type, weight, and approach conditions.
Q2: How does wind affect rate of descent calculations?
A: Wind affects ground speed, which directly impacts the rate of descent calculation. Headwinds decrease ground speed and thus decrease descent rate, while tailwinds have the opposite effect.
Q3: What is the standard glide slope angle for ILS approaches?
A: The standard glide slope angle for Instrument Landing System (ILS) approaches is 3 degrees.
Q4: Can this formula be used for all types of aircraft?
A: While the basic formula applies to all aircraft, specific aircraft characteristics and manufacturer recommendations should always be followed for precise descent planning.
Q5: How accurate is this calculation in real-world conditions?
A: The calculation provides a good estimate, but actual descent rates may vary due to factors such as wind, temperature, aircraft configuration, and weight.