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I'm pretty sure the "emergency fuel jettison" is for "I'd rather it not splash about everywhere and catch fire in the case that I put this plane down hard enoug
by bigiain 9y ago
I'm pretty sure the "emergency fuel jettison" is for "I'd rather it not splash about everywhere and catch fire in the case that I put this plane down hard enough to split the tanks open" rather than "It's impossible to land this plane safely at the same weight as it took off".
(Not that I'd want to be hurtling at the ground barely in control with many tons of fully charged LiPo battery on board either...)
- rootusrootus 9y agoIt's true. Take a 787 Dreamliner as an example. The maximum take-off weight is over 100,000 pounds more than the maximum landing weight.
- voodooranger 9y agoIf the landing speeds are the same, a heavier aircraft requires a longer landing roll. But a heavier aircraft also requires a higher landing speed. Those two phenomena compound.
- hueving 9y agoNope, look at the difference between the MTOW and MLW columns here: https://en.m.wikipedia.org/wiki/List_of_airliners_by_maximum_takeoff_weight https://en.m.wikipedia.org/wiki/List_of_airliners_by_maximum... The issue is the brakes overheating and the impact on the landing gear.
- bigiain 9y agoThanks! Yet another thing to add to "the list of stuff I'm wrong about"... :-)