Originally Posted by
slast
Can anyone give me a rough number for the minimum runway length needed for a 787 and an A350 at maximum takeoff weight, sea level and 30 deg C?
Cheers
Steve
From the B787 FCOM, roughly: flaps 15 at sea level, temperature 30°C
B787/8 RR 1000AE about 228 tons requires a 3000 m runway, but climb-limited at about 214 tons.
B787/9 RR 1000D about 247 tons requires a 3200 m runway, but climb-limited at about 237 tons.
B787/9 GE about 252 tons requires a 3200 m runway, but climb-limited at about 249 tons.
228,247,252 are around MTOW.But because the temperature is as high as 30°C, it still cannot take off at MTOW (due to the climb limit).
But if there are icing conditions and the various anti-icing systems have to be turned on or wet, contaminated and whatever, a 3200 m runway may not be sufficient even lower temperature . (All affected condition) Therefore, a runway length of 3500 m or more would be required to cover all cases (field length limit).