Track of Main Undercarriage given Maximum Deviation permissible without Filleting Calculator

Track of Main Undercarriage Formula:

\[ T = 2 \times \left(\frac{TWidth}{2} - \lambda - M\right) \]

Taxiway Width:

Maximum Deviation without Filleting:

Minimum Safety Margin:

Tolerance:

Track of Main Undercarriage: m

1. What is Track of Main Undercarriage?

Definition: Track of Main Undercarriage refers to the distance between the centers of the main landing gear wheels on an aircraft.

Purpose: This calculation helps in determining the appropriate taxiway design and ensuring safe aircraft operations on ground surfaces.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ T = 2 \times \left(\frac{TWidth}{2} - \lambda - M\right) \]

Where:

\( T \) — Track of Main Undercarriage (meters)
\( TWidth \) — Taxiway Width (meters)
\( \lambda \) — Maximum Deviation without Filleting (meters)
\( M \) — Minimum Safety Margin (meters)

Explanation: The formula calculates the maximum allowable track width considering the taxiway dimensions and safety margins.

3. Importance of Track Calculation

Details: Proper track calculation ensures safe aircraft maneuvering on taxiways, prevents wingtip collisions, and maintains structural integrity of pavements.

4. Using the Calculator

Tips: Enter the taxiway width, maximum deviation without fillet, minimum safety margin, and tolerance percentage (default ±5%). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: What is Maximum Deviation without Filleting?
A: It's the maximum allowable deviation from centerline before fillet (curved transitions) becomes necessary for safe operations.

Q2: Why is Minimum Safety Margin important?
A: It provides additional clearance to account for pilot error, wind conditions, and other operational variables.

Q3: What's a typical tolerance percentage?
A: ±5% is commonly used, but this may vary based on airport standards and aircraft types.

Q4: How do I determine Taxiway Width?
A: Taxiway width depends on aircraft size, with standard widths ranging from 18m to 30m for commercial airports.

Q5: Does this calculation apply to all aircraft types?
A: The formula is general, but specific aircraft may require adjustments based on their undercarriage configuration.