Joined: 11 Dec 2005
|Posted: Mon Apr 02, 2012 11:41 am Post subject: Runway Slope
| Runway Slope: It is the average slope threshold to threshold.
It is expressed as a percentage taking the height difference from threshold to threshold and the distance between thresholds.
e.g. Runway 09 has a threshold elevation of 672 ft. TORA is 2600m, TODA 2800m and ASDA 2800m. Opposing runway 27 has a threshold elevation of 735ft and TORA, TODA and ASDA of 2600m. Determine the runway gradient on 09?
The distance between the thresholds is: 2600m or (2600 x 3.28 ) = 8528 ft
The difference in threshold elevation is: 735-672 = 63 ft.
The gradient = 63 / 8528 x 100
= 0.74% UP