1. What is Rate of Descent?

Rate of Descent (ROD) is a measure of vertical speed downward, typically expressed in feet per minute (ft/min). It indicates how quickly an aircraft or object is descending vertically.

2. How Does the Calculator Work?

The calculator uses the Rate of Descent formula:

Where:

• \( ROD \) — Rate of Descent (ft/min)
• \( Alt\ Loss \) — Altitude Loss (ft)
• \( Time \) — Time duration (min)

Explanation: The formula calculates vertical descent speed by dividing altitude loss by time and converting to feet per minute.

3. Importance of ROD Calculation

Details: Accurate ROD calculation is crucial for aviation safety, flight planning, and ensuring controlled descents during approach and landing phases.

4. Using the Calculator

Tips: Enter altitude loss in feet and time in minutes. Both values must be positive numbers (altitude loss > 0, time > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is a typical ROD for commercial aircraft?
A: Commercial aircraft typically descend at 1,500-2,000 ft/min during cruise descent and 500-700 ft/min during final approach.

Q2: How does ROD relate to glide slope?
A: ROD is directly related to glide slope - a 3-degree glide slope typically requires about 700 ft/min descent rate at typical approach speeds.

Q3: What factors affect rate of descent?
A: Aircraft weight, airspeed, configuration (flaps/gear), and atmospheric conditions all affect descent rate.

Q4: When is high ROD dangerous?
A: Excessive descent rates can lead to hard landings, structural stress, and loss of control, especially at low altitudes.

Q5: How is ROD displayed in aircraft?
A: Most aircraft have vertical speed indicators (VSI) that display rate of climb or descent in feet per minute.