1. What is Clearance between Outer Main Gear Wheel and Taxiway Edge?

Definition: This calculator determines the clearance distance between an aircraft's outer main gear wheel and the taxiway edge, accounting for wing tip clearance.

Purpose: It helps airport engineers and planners ensure safe aircraft operations on taxiways by maintaining proper clearance distances.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( C \) — Clearance Distance (meters)
• \( S \) — Separation Distance (meters)
• \( WS \) — Wing Span (meters)
• \( Z \) — Wing Tip Clearance (meters)

Explanation: The clearance distance is calculated by subtracting both the wing span and wing tip clearance from the separation distance.

3. Importance of Clearance Calculation

Details: Proper clearance ensures aircraft can safely taxi without wingtip or gear collisions with obstacles or other aircraft.

4. Using the Calculator

Tips: Enter the separation distance, wing span, and wing tip clearance. All values must be > 0. The ±5% indicates the acceptable tolerance range.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical wing tip clearance required?
A: Standard wing tip clearance is typically 4.5m (15ft) for Code E aircraft, but varies based on aircraft size and airport standards.

Q2: Why is there a ±5% tolerance?
A: The tolerance accounts for variations in aircraft dimensions, pilot steering accuracy, and environmental factors.

Q3: How is separation distance determined?
A: Separation distance is based on airport design standards, aircraft fleet mix, and taxiway geometry.

Q4: What happens if clearance is insufficient?
A: Insufficient clearance can lead to wingtip collisions, gear strikes, or runway/taxiway incursions.

Q5: Are there different standards for different aircraft codes?
A: Yes, ICAO and FAA have different clearance requirements for aircraft in Codes A through F.

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