Maximum value of Deviation of main Undercarriage given Radius of Fillet Calculator

Formula:

\[ \gamma = -(r - R + M + \frac{T}{2}) \]

Radius of Fillet (r):

Radius of Taxiway Centerline (R):

Minimum Safety Margin (M):

Track of Main Undercarriage (T):

Deviation of Main Undercarriage (γ): m

1. What is Maximum Deviation of Main Undercarriage?

Definition: This calculator determines the maximum deviation of an aircraft's main undercarriage based on fillet radius, taxiway dimensions, safety margins, and undercarriage track.

Purpose: It helps airport engineers and planners ensure safe aircraft maneuvering on taxiways by calculating critical clearance parameters.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \gamma = -(r - R + M + \frac{T}{2}) \]

Where:

\( \gamma \) — Deviation of Main Undercarriage (meters)
\( r \) — Radius of Fillet (meters)
\( R \) — Radius of Taxiway Centerline (meters)
\( M \) — Minimum Safety Margin (meters)
\( T \) — Track of Main Undercarriage (meters)

Explanation: The formula calculates the maximum allowable deviation while maintaining safe clearances during aircraft taxiing.

3. Importance of Deviation Calculation

Details: Proper deviation calculation ensures safe aircraft operations, prevents wingtip collisions, and maintains required safety margins on taxiways.

4. Using the Calculator

Tips: Enter all dimensions in meters. Default values are provided but should be adjusted for specific aircraft and airport conditions. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the deviation calculated as negative?
A: The negative sign indicates the deviation is measured inward from the taxiway centerline.

Q2: What's a typical safety margin for airports?
A: Safety margins typically range from 3-15 meters depending on aircraft size and airport classification.

Q3: How does undercarriage track affect deviation?
A: Wider undercarriage tracks increase the potential deviation as the wheels are farther from the centerline.

Q4: When would I need to adjust the fillet radius?
A: Fillet radius may need adjustment for different aircraft types or when optimizing taxiway layouts.

Q5: Does this calculation account for aircraft dynamics?
A: This is a static calculation. Dynamic effects like steering should be considered separately.