Estimating Runway Length
Other than orientation, planning and designing the length of a runway is critical to whether or not a particular aircraft can safely use the runway for takeoff or landing. Furthermore, designing a runway to accommodate a given aircraft is a difficult task, given the fact that an aircraft's required runway length will vary as well as on several ambient conditions.
As a guide to airport planners, the FAA has published Advisory Circular 150/5325-4b, ?Runway Length Requirements for Design? . In this publication, procedure the design runway length of aircraft, based on their maximum takeoff weights (MTOW), certain aircraft performance specifications, and the airport's field elevation and temperatur design runway length is found for the critical aircraft, defined as the aircraft which flies the greatest nonstop route segment from the airports at least 500 operations per year and requires the longest runway.
The FAA's procedure for estimating runway le following data:
1. Designation of a critical aircraft
2. The maximum takeoff weight of the critical aircraft at the airport
3. The airport elevation
4. The mean daily maximum temperature for the hottest month at the airport
5. The maximum different in elevation along the runway centerline.
For the purposes of estimating runway length requirements, the