Clearance between Outer Main Gear Wheel and Taxiway Edge given Taxiway Width Calculator

Clearance Distance Formula:

\[ C = \frac{T_{Width} - T_M}{2} \]

Clearance Distance (m):

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

Definition: This calculator determines the safe clearance distance between an aircraft's outer main gear wheels and the edge of a taxiway.

Purpose: Ensures aircraft have adequate space when taxiing to prevent wheels from going off the paved surface.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ C = \frac{T_{Width} - T_M}{2} \]

Where:

\( C \) — Clearance Distance (meters)
\( T_{Width} \) — Taxiway Width (meters)
\( T_M \) — Maximum Outer Main Gear Wheel Span (meters)

Explanation: The difference between taxiway width and wheel span is divided by 2 to get equal clearance on both sides.

3. Importance of Clearance Calculation

Details: Proper clearance prevents aircraft damage, ensures safe operations in all weather conditions, and complies with aviation regulations.

4. Using the Calculator

Tips: Enter the taxiway width, maximum outer main gear wheel span, and optional tolerance percentage (default ±5%). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical taxiway width?
A: Standard taxiway widths range from 18m to 23m for commercial airports, depending on aircraft size.

Q2: How do I find the maximum outer main gear wheel span?
A: This is specified in aircraft technical documents, typically between 10m-15m for large commercial jets.

Q3: Why include a tolerance percentage?
A: The ±5% tolerance accounts for variations in pilot steering, surface conditions, and measurement accuracy.

Q4: What's the minimum required clearance?
A: ICAO recommends at least 4.5m clearance for Code E aircraft (like Boeing 747).

Q5: Does this account for wingtip clearance?
A: No, this calculates wheel clearance only. Wingtip clearance requires separate calculation.