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to attain V2 speed prior to reaching 35 foot height (with retraction of landing gear
initiated after airplane becomes airborne), or
B. Stopped by immediately closing both power levers (retarding power levers to idle
actuates ground spoilers) and applying full wheel braking action if Anti-Skid System
is operative. If Anti-Skid System is inoperative, 300 psi as indicated by EICAS for
both the left and right brake systems should be immediately applied and maintained
until the airplane comes to a complete stop.
NOTE: Takeoff is permitted with anti-skid inoperative or ground spoilers inoperative, but not
both, provided 20° flaps are used.
EXAMPLE 1: Determine if field length limited for a given gross weight. If not limited by field
length, determine the possible range for V1 / VR.
Given: Airport Ambient Temperature............................................................................-5°C
Airport Pressure Altitude ..............................................................................6000 ft.
Flaps .....................................................................................................................20°
Takeoff Gross Weight .................................................... 63,000 pounds (28,580 kg)
Runway Length ............................................................................. 7000 ft. (2134 m)
Runway Slope .......................................................................................+1% (uphill)
Stopway............................................................................................... 200 ft. (61 m)
Clearway............................................................................................ 500 ft. (152 m)
Headwind .......................................................................................................0 knots
Anti-Skid and Ground Spoilers ...........................................................OPERATIVE
Cowl and Wing Anti-Ice ..................................................................................... ON
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
SECTION 5
SPECIAL
PERFORMANCE
FAA APPROVED 5.2-3
31 May 2000 GIV-SP
Solution:
A. Enter the Flaps 20° MAXIMUM ALLOWABLE TAKEOFF GROSS WEIGHT
chart at -5°C, read right to pressure altitude = 6000 ft., read down to intersection
with horizontal line from takeoff gross weight = 63,000 pounds (28,580 kg). Read
effective runway length 5300 ft. (1615 m).
B. Enter the Flaps 20° REFERENCE ACCELERATE-STOP DISTANCE Chart with:
Accelerate-Stop Distance available = 7200 ft. (7000 + 200) (2195 m)
Determine reference Accelerate-Stop Distance = 7200 ft. (2195 m).
C. Enter the Flaps 20° REFERENCE ACCELERATE-GO DISTANCE chart with:
Actual Runway Length = 7000 ft. (2134 m)
Determine reference accelerate-go distance = 6300 ft. (1920 m).
D. Enter the Flaps 20° RUNWAY LENGTH AND V1 ADJUSTMENTS chart with
effective runway length = 5300 ft. (1615 m). Any V1 / VR ratio along this line can
be selected if it results in reference accelerate-go and accelerate-stop distances less
than those determined in Steps B and C of this example. V1 / VR can range from
0.87 to 1.00. Refer to Section 5.5 for subsequent takeoff planning.
NOTE: Lower values of V1 / VR can be used to reduce wear on brakes should a
stop be necessary. For obstacle clearance, higher values of V1 may be
used to reduce reference accelerate-go distance which determines
reference zero. Moving reference zero point closer to brake release
provides a greater horizontal distance in which to clear obstacle. See
Section 5.5 for limitations on V1.
EXAMPLE 2: (Not shown on chart) Determine the maximum allowable takeoff gross weight
and V1 / VR permitted by field length.
Given: Airport Ambient Temperature .........................................................................20°C
Airport Pressure Altitude.............................................................................4000 ft.
Flaps....................................................................................................................20°
Runway Slope......................................................................................+1% (uphill)
Runway Length............................................................................ 5400 ft. (1646 m)
Stopway ........................................................................................... 400 ft. (122 m)
Clearway ........................................................................................ 1000 ft. (305 m)
Headwind....................................................................................................20 knots
Anti-Skid and Ground Spoilers .........................................................OPERATIVE
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湾4飞机飞行手册AFM Gulfstream IV AIRPLANE FLIGHT MANUAL 1(121)
