Match the designated component in List 1 with its purpose at airports in List 2.

List 1

A. Basic Runway length

B. Runway Capacity

C. Runway geometric design

D. Hanger

List 2

1. Width and length of safety area of airport

2. Housing, servicing of aircrafts

3. Location of exit taxiways

4. Engine failure class

Basic Runway length

• It is the length of the runway under the following assumed conditions at the airport-

1. Airport at sea level
2. Standard temp at airport is 15℃
3. No wind is blowing
4. Runway is levelled in longitudinal direction
5. Aircraft is loaded at its full loading capacity

• The basic runway length is determined in three cases-

1. Normal landing case – aircraft should stop within 60% of landing distance or runway length
2. Normal take off case – minimum clearway width should be 150m and it is also kept free from obstructions.
3. Engine failure case – In this case, basic runway length may consider either clearway or stopway or both.

Runway capacity

• The ability of a runway system to accommodate aircraft landing and take off.
• It is usually expressed in operation per hour or operation per year.

Runway geometric design

• The following items are to be considered in geometric design of runway-

1. Runway length
2. Runway width
3. Width and length of safety area
4. Transverse gradient
5. Longitudinal and effective gradient
6. Rate of change of longitudinal gradient
7. Sight distance

Hanger

• It is the covered area for repair and servicing the aircraft
• Hanger depends upon the size of aircraft and turning radius
• Number of hangers depends upon peak hour per volume of aircraft