1. What is Clearway Distance?

Clearway Distance is the difference between takeoff distance available (TODA) and takeoff run available (TORA). It represents the area beyond the runway that is kept clear of obstacles to allow aircraft to safely abort takeoff or continue takeoff in case of engine failure.

2. How Does the Calculator Work?

The calculator uses the Clearway Distance formula:

Where:

• \( CL \) — Clearway Distance (m)
• \( FL \) — Field Length (m)
• \( FS \) — Full Strength Pavement Distance (m)

Explanation: The formula calculates the clearway distance by subtracting the full strength pavement distance from the total field length available for takeoff operations.

3. Importance of Clearway Distance Calculation

Details: Accurate clearway distance calculation is crucial for airport design, runway safety planning, and ensuring aircraft have sufficient space for safe takeoff operations, particularly in emergency situations.

4. Using the Calculator

Tips: Enter field length and full strength pavement distance in meters. Both values must be positive numbers, and field length should be greater than or equal to full strength pavement distance.

5. Frequently Asked Questions (FAQ)

Q1: What is the purpose of clearway distance?
A: Clearway distance provides additional safety margin beyond the runway for aircraft during takeoff operations, allowing for safe abort procedures or continued takeoff in case of emergencies.

Q2: How is clearway distance different from stopway?
A: Clearway is an area beyond the runway that is clear of obstacles, while stopway is a prepared area for stopping aircraft in case of aborted takeoff.

Q3: What are typical clearway distance requirements?
A: Requirements vary by aircraft type and airport category, but typically range from 60-300 meters depending on the runway classification and aircraft operations.

Q4: When is clearway distance most critical?
A: Clearway distance is most critical for larger aircraft, operations from shorter runways, and airports with challenging terrain or obstacle environments.

Q5: How does clearway distance affect airport operations?
A: Adequate clearway distance allows for higher aircraft payloads, improved safety margins, and may enable operations that would otherwise be restricted due to runway length limitations.