| Departure on 17R elevation computation
The departure slope is defined by the FAA at 40:1 from the end of the runway. This results in a
minimum height of 66.25 feet above the PT centerline. This is the minimum clearance required
for a departing aircraft to fly safely over an aircraft taxiing on the PT as shown in Figure 4.
However, the FAA/AOSC has reduced this height to 65 ft in the final approval document for PT
construction at DFW [3].
The height of aircraft during the departure phase on runway 17R is shown in Figure 4. The mean
height above runway 17R is computed as 1,208 feet above runway elevation. The figure shows
the actual elevation of the PT, elevation at the end of runway 17R, elevation of the visual barrier
that DFW intends to construct beyond the runway to help pilots verify when the runway is free
of obstructions and the elevation of the aircraft flying over the PT. A Category E aircraft is
taxiing on the PT after landing on runway 17C.
The thirteen feet high barrier proposed by the FAA/AOSC is shown at a distance of 1,100 feet
from the south end of runway 17R. Runway 17R is 13,400 feet long and the PT centerline is at
2,650 feet from the south end of the runway. Therefore, the PT centerline is at 16,050 feet (3.04
Satyamurti and Mattingly
9
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9
miles) from the northern end of runway 17R. The difference in elevation between the runway’s
north end and PT centerline is 11.5 feet.
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