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oldngrey

144 Posts.

30/06/17

21:27

Post #: 25600602
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Originally posted by fruity ↑

It's not that. On hot days it's harder all around for aircraft. The aircraft has to move faster through the air to generate the same amount of lift. Its engines will also not generate as much thrust as they would when the air is cooler and denser so it will accelerate more slowly. As a result the runway length increases quite dramatically, to the point where the wheels may not be rated for the necessary speeds even if the distance is sufficient.

What is more critical is the matter of single engine performance. An airliner has to be able to take off after V1 even if one of the engines fails. In hot and high conditions, it's quite likely that some of the smaller, regional airliners are at the edge of the envelope where if an engine were to fail during the takeoff roll, the aircraft would not have enough distance on the runway left to stop but would also not generate enough thrust from the remaining engine to get off the ground. In that situation it only ends up one way and that is in a fireball at the end of the runway.

Therefore, planes grounded and flights cancelled.

Why can aircraft take off from the Pilbara/minesites? Different aircraft with different engines, but when it's really hot they can't. Flights are scheduled during the cooler parts of the day during summer.

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