Reduced Thrust Examples
Airbus Model A321-112
And example of the conservatism inherent in the use of the assumed (flexible) temperature method of reduced thrust calculation.
Conditions A321-112
CFM56-5B2
Sea level
O A T = 15°C
9459ft runway
Actual airplane weight = 85 T permits assumed (flexible) temperature of 40°C
Parameters Actual temp is 15°C and assumed (flexible) temp is 40°C Actual temp is 40°C Margin
N1 (%) 93.6 93.6
V1 (KT IAS/TAS) 150 / 147 150 / 153 - 6 KTAS
VR (KT IAS/TAS) 158 / 155 158 / 162 - 7 KTAS
V2 (KT IAS/TAS) 159 / 158 159 / 165 - 7 KTAS
Thrust at V1, Lbs per engines 23.451 23.451 0 Lbs
Far field length (ft) 8859 9459 600 ft
Accelerate-stop distance (engine-out) ---ft 8547 9459 912 ft
Accelerate-go distance (engine-out) ---ft 8859 9459 600 ft
Accelerate-go distance (all-engine) ---ft 7393 7970 577 ft
Second segment gradient % 2.4 2.4 0.0 %
Second segment rate of climb ---ft per minute 387 401 - 14 Fpm
Reduced Thrust Examples
Airbus Model A330-301
And example of the conservatism inherent in the use of the assumed (flexible) temperature method of reduced thrust calculation.
Conditions A330-301
CF6-80E1A2
Sea level
O A T = 15°C
9710ft runway
Actual airplane weight = 212 T permits assumed (flexible) temperature of 40°C
Parameters Actual temp is 15°C and assumed (flexible) temp is 40°C Actual temp is 40°C Margin
N1 (%) 102.5 102.5
V1 (KT IAS/TAS) 148 / 148 148 / 155 - 7 KTAS
VR (KT IAS/TAS) 150 / 150 150 / 156 - 6 KTAS
V2 (KT IAS/TAS) 155 / 155 155 / 162 - 7 KTAS
Thrust at V1, Lbs per engines 50.347 50.347 0 Lbs
Far field length (ft) 9103 9710 607 ft
Accelerate-stop distance (engine-out) ---ft 8916 9710 794 ft
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：TAKEOFF SAFETY TRAINING AID(6)
