I think the non-dumping aircraft are relegated to patient fuel burn procedures if it is decided to land at a significantly lighter weight. In the end, assuming that there is not a time critical situation lack of fuel dumping capability should not affect ones decision about whether to land at a lighter weight. It just means holding for a longer time.
Each situation is different. If on a very long runway for type and the company prefers an overweight landing, then it might make sense. I just suggest giving yourself some extra margin instead of accepting a landing performance anywhere close to the limit.
Is this a good reason for a high speed RTO?
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Re: Is this a good reason for a high speed RTO?
The energy you need to dissipate is the kinetic energypelmet wrote: ↑Wed Dec 11, 2019 10:07 pm
I suspect the mathematics of it all is that the increased energy required to stop is the square of the runway increased weight, or one of those kind of formulas where what was around a 5%weight increase required much more than 5% increase in braking energy. More weight combined with higher approach speed. And then you float a bit.
Ek = (1/2) * m * v^2
If you are only concerned about the weight, then 5% increase in mass will result in 5% increase in landing roll (if the brakes can handle it)
If the 5% extra weight results in 5% extra speed, then a 5% increase in mass will result in a 16% increase in landing roll (if the brakes can handle it)
If you float due to the extra speed, the extra speed was probably not necessary though...
As an AvCanada discussion grows longer:
-the probability of 'entitlement' being mentioned, approaches 1
-one will be accused of using bad airmanship
-the probability of 'entitlement' being mentioned, approaches 1
-one will be accused of using bad airmanship
Re: Is this a good reason for a high speed RTO?
Thanks. Higher approach speeds go hand in hand with higher weight as we all know, so that ten thousand pounds over max landing weight on a narrow body jet is significant even if it doesn’t sound like too much.
Re: Is this a good reason for a high speed RTO?
And brake energy requirements are not directly proportional to landing ground roll.
Going for the deck at corner
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co-joe
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Re: Is this a good reason for a high speed RTO?
I would think that a 130 Kt RTO in a 763 would put you at risk for melting tire fuse plugs, wouldn't it? Did they have to wait for cool down before taxiing back to the gate? Did they get local ARFF to come put the IR camera on their brakes before taxxing? Just curious.
