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Accueil >> Forum >> Go around and runway question. Forum Aviation civile
Go around and runway question.
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Message de ross - Envoyé le 06 Oct 20:21 |
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What situation requires an aircraft to perform a go around? Is it the decision of the pilot or is there and instrumenent warning? While watching videos, some aircraft actually land, then take off again. Others make the approach but then climb out. Also, what requires more runway.Take-off or landing?
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Message de EI-DUB - Envoyé le 07 Oct 1:10 |
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Depends, mostly it is pilot judgment.
As you refer to sometimes, they touch down and then go around, this may be due to a situation where the aircraft has touched down, but it may not be safe for them to try and bring it to a stop, due to being too far down the runway on landing, or if they were misaligned etc etc.
Other times ATC might ask pilots to go around if they have reason to think that it would be unsafe to land due to traffic or if ATC see what they deem to be a mechanical defect, such as landing gear not fully deployed etc.
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Message de FLX - Envoyé le 08 Oct 11:44 |
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An airliner always use less rwy to land than to take-off given the same wind conditions.
1st, an airliner always weights more during take-off than landing(i.e. fuel burnt). 2nd, take-off speed(i.e. VR) is usually higher than touch-down speed. 3rd, even if the take-off and touch-down speed are somehow designed to be exactly the same, it usually takes longer to accelerate than to decelerate(e.g. a family car takes 9secs to do 0-100kmh usually takes 6secs or less to do 100-0kmh). These are the reasons why we sometimes see heavier jets always use the longest rwy to take-off but often use a shorter rwy to land in the same airport. This type of ops are in fact common in some leading int'l airports(e.g. AKL, YVR, NRT, SYD, SEA, etc.) with effectively just 1 long and 1 short rwys.
Theoretically, the only exception to the above rule is when an aircraft with no payload is carrying just enough fuel(i.e. Very light) to take-off and reach cruise, receive mid-air refueling upto its MLW(Max Landing Weight) and then land immediately. This can potentially make its landing distance longer than take-off. Realistically, this kind of ops is possible only in military flights and even then, serves no true military value except testing.
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Message de Envoy320 - Envoyé le 10 Oct 15:52 |
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A thousand things can cause a go-around....which is an approach and climb out...
A touch and go....land then take off again - this is generally used in training only.
Its far safer (generally) to stay on the ground once landed than to take off again if there is a problem with the aircraft.
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