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determined.
CAUTION: THE OBSTACLE CLEARANCE CHARTS MUST BE ENTERED WITH THE
ASSUMED TEMPERATURE.
TAKEOFF PLANNING EXAMPLE
1. Departure Conditions:
a. Dry, Hard-Surfaced Runway
b. Available Field Length = 6200 feet
c. Airport Pressure Altitude = Sea Level
d. Ambient Temperature = +4°C
e. Wind Component = 5 knot headwind
f. Runway Slope = 1.0% uphill
g. Takeoff Runway Obstacles = None
2. Airplane Configuration:
a. Takeoff Gross Weight = 62,000 Pounds
b. Flaps = 20°
c. Ground Spoilers = INOPERATIVE
d. Cowl Anti-icing = As required (ambient temp.
is below +10°C)
e. Wing Anti-icing = OFF
3. Determine:
a. Adjusted Runway Length (from appropriate table). See TAKEOFF PLANNING EXAMPLE
chart, Figure A-1.
- Headwind Correction (6200 x +2%) = +124 feet
- Uphill Slope Correction (6200 feet x -20%) = -1240 feet
- Inoperative Ground Spoilers Correction: = -800 feet
- Adjusted Runway Length (6200 + 124 - 1240 - 800): = 4284 feet
b. Takeoff Thrust and V-speeds:
- Full-thrust and Flex-thrust Takeoff
VFS = 157 KCAS
VSE = 164 KCAS
VREF = 144 KCAS
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
FLEX EPR
SPECIAL PERFORMANCE
APPENDIX A
FAA APPROVED A-5
30 May 2002 GIV-SP
- Full-thrust Takeoff
MIN EPR = 1.69
V1 = 122 KCAS
VR = 130 KCAS
V2 = 137 KCAS
- FLEX-thrust Takeoff
FLEX EPR = 1.67
V1 = 123 KCAS
VR = 131 KCAS
V2 = 137 KCAS
c. Verify MAX TEMP and maximum EPR reduction are not exceeded:
- MAX TEMP = +50°C
Assumed Temperature = +35°C
NOTE: Brake energy, tire speed, and takeoff climb limitations are included in the
determination of MAX TEMP. None of these limits will be exceeded as long
as the assumed temperature does not exceed MAX TEMP.
- MIN EPR minus FLEX EPR equals EPR reduction
1.69 - 1.67 = .02
Maximum allowed EPR reduction of 0.15 is not exceeded.
d. Obstacle clearance verification
- Verify obstacle clearance based on the selected flap setting and the assumed temperature
(+35°C for this example). Use the field length found in the table as the reference
accelerate-go distance. If obstacles are not cleared, reduce the assumed temperature by
columns until obstacle clearance height is attained.
- Determine V-speeds and FLEX EPR associated with the final assumed temperature.
GULFSTREAM AEROSPACE
GIV AIRPLANE FLIGHT MANUAL
FLEX EPR
SPECIAL PERFORMANCE
APPENDIX A
A-6 FAA APPROVED
GIV-SP 30 May 2002
TAKEOFF PLANNING EXAMPLE
AIRPORT PRESSURE ALTITUDE = SEA LEVEL TAKEOFF FLAP 20°
74,600 LB MTOGW OAT (°C) 50 45 40 35 30 25 20 15 5 -5 -15
OAT (°F) 122 113 104 95 86 77 68 59 41 23 5
MIN EPR 1.59 1.62 1.64 1.67 1.70 1.70 1.70 1.70 1.69 1.69 1.69
-- 74,600 LB --
VFS = 173 KCAS FLD LNGTH ****** ****** ****** 6,130 5,750 5,660 5,580 5,490 5,350 5,170 5,000
VSE = 180 KCAS V1 KCAS ****** ****** ****** 140 139 139 139 139 140 140 140
VREF = 158 KCAS VR KCAS ****** ****** ****** 146 145 145 145 145 145 145 145
MAX TEMP = 37°C V2 KCAS ****** ****** ****** 150 150 150 150 150 150 150 150
-- 74,000 LB --
VFS = 172 KCAS FLD LNGTH ****** ****** ****** 6,030 5,660 5,580 5,490 5,400 5,270 5,090 4,920
VSE = 179 KCAS V1 KCAS ****** ****** ****** 140 138 138 138 138 139 139 139
VREF = 158 KCAS VR KCAS ****** ****** ****** 145 144 144 144 144 144 144 144
MAX TEMP = 38°C V2 KCAS ****** ****** ****** 149 149 149 149 149 149 149 149
-- 72,000 LB --
VFS = 170 KCAS FLD LNGTH ****** ****** 6,120 5,710 5,370 5,280 5,200 5,120 4,990 4,830 4,660
VSE = 177 KCAS V1 KCAS ****** ****** 138 137 136 136 136 136 136 136 136
VREF = 156 KCAS VR KCAS ****** ****** 143 143 142 142 142 142 142 142 142
MAX TEMP = 40°C V2 KCAS ****** ****** 147 147 147 147 147 147 147 147 147
-- 68,000 LB --
VFS = 165 KCAS FLD LNGTH ****** 5,830 5,440 5,100 4,800 4,720 4,650 4,570 4,460 4,310 4,170
VSE = 171 KCAS V1 KCAS ****** 135 133 132 130 130 130 130 131 131 131
VREF = 151 KCAS VR KCAS ****** 139 139 138 137 137 137 137 137 137 137
MAX TEMP = 46°C V2 KCAS ****** 143 143 143 143 143 143 143 143 143 143
-- 66,000 LB --
VFS = 162 KCAS FLD LNGTH ****** 5,480 5,120 4,800 4,520 4,450 4,380 4,310 4,210 4,070 3,930
VSE = 169 KCAS V1 KCAS ****** 132 130 129 128 128 128 128 128 128 128
VREF = 149 KCAS VR KCAS ****** 137 136 135 135 135 135 135 135 135 135
MAX TEMP = 49°C V2 KCAS ****** 141 141 141 141 141 141 141 141 141 141
-- 64,000 LB --
VFS = 160 KCAS FLD LNGTH 5,530 5,150 4,820 4,520 4,260 4,200 4,130 4,070 3,970 3,830 3,700
VSE = 166 KCAS V1 KCAS 130 129 128 126 125 125 125 125 125 125 125
　
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