311–320 of 338 posts
why was meal service provided when the staff is aware of the weather conditions? the seatbelt sign is usually shown at a slight deterioration of weather, i wonder why they went ahead with this.
thoughts and prayers.
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Bad tip. Case in point: on this very flight, 9 of the 18 crew members had moderate injuries ( https://apnews.com/article/singapore-airlines-flight-turbule... )
Most of the crew are usually not wearing a seat belt
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When the airplane experiences high negative G you get propelled upwards at 9.8m/s/s times the negative G. A -1G force cancels the constant +1G force gravity exerts resulting in free-fall or floating. If the negative G force is higher than 1G you are now accelerating upwards relative to the fuselage. A -2.5G event "pulls" you upward 1.5x harder than falling and you absolutely can die from falling down due to head inju…
Exactly, but this is what I'm saying from the beginning :) EDIT: to clarify, my initial doubt/question was about what actually is the cause for the force that, during a turbulence, makes the plane fall at >1G and thus making you hit the ceiling if you are not tied to the seat?
Entropy causing gasses to mix evenly is true... on a large enough timescale.
In reality any gas or fluid will form boundary layers between masses of the substance having different temperatures, moving at different speeds, or having other properties (eg salinity for a liquid).
When flying you can end up passing through these discontinuities - regions where the air is very turbulent on both sides of the boundary. You can also develop different amounts of lift in one air mass vs another due to density. The entire air mass itself may be moving in a different direction and/or at a different velocity on one side of the boundary vs the other.
In a small airplane the effect is more pronounced. On a bright sunny day near the ground I get negative G when passing over a small bit of water followed by positive G when passing over a hot parking lot. It is very obvious where there is a region of hotter less dense air rising vs cooler more humid air.
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Sibling comment from thedrbrian explains it very well while it is unlikely to see clear air turbulence (CAT) with our current weather radars. Of course if cost would be not an object we could detect these events. One possible solution would be to fly companion drones ahead of the jet. They could then detect CAT quite easily by just running into them. The spacing is critical with this scheme. If the probe drone is too…
What kind of propulsion can push a drone 900km/h for 12hours?
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Exactly, but this is what I'm saying from the beginning :) EDIT: to clarify, my initial doubt/question was about what actually is the cause for the force that, during a turbulence, makes the plane fall at >1G and thus making you hit the ceiling if you are not tied to the seat?
Ah got it. I'm currently training for PPL so have been studying this among other things. Entropy causing gasses to mix evenly is true... on a large enough timescale. In reality any gas or fluid will form boundary layers between masses of the substance having different temperatures, moving at different speeds, or having other properties (eg salinity for a liquid). When flying you can end up passing through these disco…
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> No, just not pusillanimous about it, given the odds. Fascinating; an exemplar of both toxic masculinity and grandiloquence in a single word.
You keep using this term "toxic masculinity". I don't think it means what you think it means. Or perhaps you also think only men are brave enough to go to airplane bars (or to untie their belt or stand from their seat during a flight even when it's not "absolutely necessary"?)
> Destitute of a manly or courageous strength and firmness of mind; of weak spirit; mean-spirited; spiritless; cowardly; -- said of persons,
“Destitute of a manly spirit” implies that there is such a thing as a manly spirit one can be more or less possessed of… that falls well and truly under the scope of the meaning of toxic masculinity.
And perhaps you, for some reason, think that women aren’t perfectly able to engage in toxic masculinity?
Either way, I only use the term where and when appropriate.
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Loose seatbelts are probably fine. That’s what I do. Presumably that keeps me from getting launched into the ceiling. A lap belt is a compromise anyway. Aircraft crew use more as do car drivers for that matter.
Right but what's the point? If the belt is on very loose, you give your body a chance to gain momentum, which will be redirected when the seat belt catches you, which would lead to serious injury. The belt doesn't need to be on tight, but it should be relatively snug. It's just one of those things that is trivial to do, with a very, very low probability to save you from injury, but costs nothing, so why not...
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> No, just not pusillanimous about it, given the odds. Fascinating; an exemplar of both toxic masculinity and grandiloquence in a single word.
>toxic masculinity Would love an explanation of how you got here
> Destitute of a manly or courageous strength and firmness of mind
Not much of a leap.
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Right but what's the point? If the belt is on very loose, you give your body a chance to gain momentum, which will be redirected when the seat belt catches you, which would lead to serious injury. The belt doesn't need to be on tight, but it should be relatively snug. It's just one of those things that is trivial to do, with a very, very low probability to save you from injury, but costs nothing, so why not...
You won't gain additional momentum from a loose belt. But a loose belt may give your body the chance to slip out. The impulse you feel from a tight belt will be no less than the impulse you feel from a loose one.
I don't see any interpretation of that that makes it true.
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> So it's a bit like "why don't people wear a welding mask while cooking?" Your kitchen does not have staff telling you to make sure you are wearing a welding mask. It may also lack appropriate indicator lamps that tell you when it is a good time to wear your welding mask. It is also not standard practice in all kitchens. It’s actually not like airplane seatbelts at all, where they are ubiquitous and the risks of not…
People are constantly bombarded with seemingly unnecessary warnings. I frequently assume that these warnings are to insulate a company from legal trouble and not really to protect me. This might be an American perspective.
I didn’t have any headphones on. At first it felt a little bit overboard, but with events like this turbulence happening, I can see the need for it.