The Core Engineers

Taxiway Design Taxiway Radius: The radius for taxiway can be found by  R = (V*V)/.f where, R is radius of curve in m V is the speed in kmph f is the coefficient of friction For airport serving large subsonic jet transports, minimum value of radius of curvature is 120 m whatever be the speed. For airport serving supersonic transports, minimum radius must be 180 m. Exit Taxiway: Taxiway should be located such that landing aircraft leaves the runway as early as possible. Such taxiway is called Exit Taxiway. Apron: Apron is paved area for aircraft parking, loading and unloading of passengers and cargo. This area is near terminal building or hangers. Size of apron depends upon number of gate positions.  Holding Apron: Waiting area for aircraft before take offs is called Holding Apron. It's size depends on peak hour aircraft movements, aircraft size and maneuvering characteristics. Apron Turn Table: It is used to expedite the parking of aircraft and save parking space. Hanger: Hange...

Capacity & Tunneling Area Airport Capacity: It is the number of aircraft movements which an airport can process within a specified period of time with average delay to the departing aircraft within the acceptable time limit. The following factors affect the airport operating capacity: Single Runway Parallel Runway Intersecting Runway Non-Intersecting Runway Runway Capacity: It is defined as the ability of a runway system to accommodate aircraft landing and take offs. Expressed as operations/hour or operations per year. Saturation Capacity: The ultimate or saturation capacity of a runway is the maximum number of aircraft that can be handled during a given period under conditions of continuous demand. Gate Capacity: A Gate is defined by an aircraft parking spcae, adjacent to a terminal building and used by a single aircraft for the loading and unloading of passengers, baggage and mail. Hence Gate Capacity is defined as the ability of a specified number of gates to accommodate aircraf...

Airport Design: Design Orientation The runway is usually oriented in the direction of prevailing winds. The winds is the direction opposite to the direction of landing and take-off, provides greater lift on the wings of the aircraft when it is taking off. The Maximum permissible cross wind component depends upon the size of the aircraft and the wing configuration. Airport Serving and Max Limit: 1. For Small Aircraft - 15 kmph 2. For mixed traffic - 25 kmph 2. For Big Aircraft - 35 kmph Runway Length The length of runway under the following assumed conditions at the airport: 1. Airport altitude is at sea level 2. Temperature at the airport is standard (15 degree) 3. Runway is leveled in the longitudinal direction. 4. No wind is blowing on the runway 5. Aircraft is loaded to its full loading capacity 6. There is no wind blowing enroute to the destination 7. Enroute temperature is standard #Corrections for Elevation, Temperature and Gradient:- Correction of Elevation: Basic runway length ...

Airport Planning: 1. Planning : The regional plan usually provides the following info: 1. Approximate locations of airport in National Map. 2. Classification of Airport. 3. Location of Air Strip. 4. Routes of Air Travel. Following Data is collected for Regional Planning: 1. Population. 2.Topographical and Geographical features. 3. Existing Airport in Vicinity. 4. Air traffic Characteristics Minimum Spacing from Existing Airport: 1. For Airport serving small general aviation aircrafts under VFR conditions = 3.2 km  2. For Airport serving bigger aircraft under VFR conditions = 6.4 km 3. For Airport operating piston engine aircraft under IFR conditions = 25.6 km 4.For jet aircrafts under IFR conditions = 160 km The best location is site adjacent to the main highway. 2. Approach Zone: The width clearance area are known as approach zone, required on either side of runway along the direction of landing and take off. Over this area the aircraft can safely loose or gain altitude. 3. Clear ...