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Aircraft-Specific Temperature Adjustment and Wind Data Analysis for Runway Operations

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This advisory circular provides guidelines for temperature adjustments affecting aircraft operations based on maximum takeoff weight (MTOW) and runway configurations. It emphasizes the need for specific temperature adjustments of 0.65% per degree Fahrenheit above 59°F, and outlines factors influencing runway orientation, crosswind limits, and windrose analysis. The document also highlights the importance of historical wind data, seasonal variations, and operational safety for both VFR and IFR conditions. Comprehensive wind analysis ensures effective runway usage maximizing safety and operational efficiency.

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Aircraft-Specific Temperature Adjustment and Wind Data Analysis for Runway Operations

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  1. See: http://www.faa.gov/documentLibrary/media/advisory_circular/150-5325-4B/150_5325_4b.pdf New Approach • Aircraft specific tables and charts

  2. Temperature Adjustment = 0.65% per degree F above 59 degrees MTOW 100,000 Runway 6,800 ft Adjusted 8,300

  3. Runway Orientation • Based on predominant winds • Minimization of crosswinds • Winds perpendicular to plane • Safety concerns • 10-20 knots (11.5-23 mph) • Max crosswind function of • Airport category (FAA) • Runway length (ICAO) • Required coverage at least 95%

  4. Wind Data

  5. Wind Data Issues • Night operations • 10 year historical data • Seasonal variation • Visibility • Visual flight rules (VFR) • Instrument flight rules (IFR) • Need for crosswind runway

  6. Windrose

  7. Wind Analysis (1/4) Determine max crosswind

  8. Wind Analysis (2/4) 23 23 5 Runway 5-23 Use 96% Runway 23 Use 43%

  9. Wind Analysis (3/4) 24 32 24 6 6 14 Runway 6-24 Use 80% Runways 14-32 & 6-24 Use 98%

  10. Wind Analysis (4/4) 6 14 Runways 6 & 14 Use 35%

  11. Windrose Example Coverage 92.8%

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