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Page 3
FAA Approved
Original Issue: Feb 28, 2006
Sub-section - 5.50
LANDING FIELD LENGTHS
Hawker 850XP Pro Line 21 Airplane Flight Manual
INTRODUCTION
The maximum weight for landing distance available (dry runway factored landing distance) is
given on Figure 5.50.1. The gross landing distance measured in performance tests is equal to
60% of that scheduled in Figure 5.50.1.
Figure 5.50.2 provides a convenient method of determining unfactored landing field length or the
landing distance required for 80% runway utilization.
The maximum weight thus derived will not necessarily be the maximum permissible weight for
the landing because the landing WAT curves (see Sub-section 5.45) might be critical.
MAXIMUM LANDING WEIGHT FOR LANDING DISTANCE AVAILABLE
The maximum landing weight for landing distance available is given for varying field pressure
altitudes and wind components on Figure 5.50.1 for dry runways only.
Figure 5.50.3 shows the effect of a slippery runway on landing performance (see NOTE 3).
See NOTE 6 for landing performance on a wet runway.
Associated conditions
Engines
Thrust levers closed at 50 feet
Flaps
45
°
Landing Gear
Down
Lift Dump
Selected after touchdown
Wheel Brakes
Normal system selected
Airspeed
V
at 50 feet (see Figure 5.10.3)
NOTES:
1.
The wind grid is factored in such a way that the effect of not more than 50% of
headwinds and not less than 150% of tailwinds is obtained.
Reported winds may therefore be used directly in the grids but, when a landing is to be
made into a headwind greater than 40 knots, the performance appropriate to a
headwind of 40 knots is to be obtained from the graph.
2.
Figure 5.50.1 is based on ISA temperature conditions as required by the operating
regulations. For information, landing distance required is increased by about 3% for
every 10
°
C increase in temperature.
REF
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For Training Purposes Only