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Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]

bmj.com

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Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]

#91

Post by haldujai »

sampo wrote: post #62
hcks wrote: post #12

What point is this article trying to make?

> What point is this article trying to make? There is no evidence from RCT studies, that parachutes work (this post). There is no (or only very weak) evidence from RCT studies, that condoms work: https://jech.bmj.com/content/65/2/100 According to the Cochrane Database of Systematic Reviews, there is no evidence from RCT studies, that face masks would protect against respiratory infections: https://www.cochranelibrary…

This article predates the Cochrane review and pandemic so I doubt that was their goal.

Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]

#92

Post by JackFr »

ricksunny wrote: post #70
King-Aaron wrote: post #34

Earlier quoted context omitted.

That introduction Haldane quote: > You can drop a mouse down a thousand-yard mine shaft; and, on arriving at the bottom, it gets a slight shock and walks away, provided that the ground is fairly soft. A rat is killed, a man is broken, a horse splashes. "A horse splashes". That's some mental imagery right there.

Makes me wonder if a bunch of the world's smallest flightless mammal (a fraction of the house mouse's mass) were released at altitude, would they survive? (Not proposing that this be done but thought experiments and/or simulations): https://en.m.wikipedia.org/wiki/Etruscan_shrew

“As god is my witness I thought turkeys could fly”

https://m.youtube.com/watch?v=lf3mgmEdfwg

Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]

#93

Post by bombcar »

dtgriscom wrote: post #67
fragmede wrote: post #46

Earlier quoted context omitted.

Also correlation is not causation. Just because some people jumping from planes have parachutes doesn't mean that all people jumping from planes have parachutes.

Wearing parachutes cause people to jump out of planes.

Surgeon General's Warning: parachutes have been known to the state of California to cause people to jump out of perfectly working planes.

Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]

#94

Post by dpratt71 »

JackFr wrote: post #92
ricksunny wrote: post #70

Earlier quoted context omitted.

Makes me wonder if a bunch of the world's smallest flightless mammal (a fraction of the house mouse's mass) were released at altitude, would they survive? (Not proposing that this be done but thought experiments and/or simulations): https://en.m.wikipedia.org/wiki/Etruscan_shrew

“As god is my witness I thought turkeys could fly” https://m.youtube.com/watch?v=lf3mgmEdfwg

Turkeys can fly, though. Just not the domestic ones :)

Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]

#96

Post by amelius »

snitty wrote: post #83
amelius wrote: post #57

Did anyone try to use a large airbag suit/chamber to survive a plane crash while still in the plane?

To the best of my knowledge that hasn't been tried. Among other things, fatal crashes typically occur at speeds over 2x those of car crashes. There's no meaningful ability to emergency brake before a crash, and many small airplanes don't have the weight budget to get the things that help you survive a crash, like crumple zones. An airbag won't do much if you're still going to be squeezed between the engine and tail o…

Well, if you are in the middle of a 737 you have quite some crumple zone. And you can probably see the crash coming in advance, so plenty of time to inflate your airbag suit/chamber.

Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]

#97

Post by EGreg »

King-Aaron wrote: post #34
gnicholas wrote: post #31

I came to leave a snarky joke comment about "in mice?", and then I remembered that mice don't actually need parachutes because their terminal velocity is roughly the same as a human using a parachute [1]. If someone actually ran the study with mice, they'd find that parachutes aren't necessary! 1: https://johnmjennings.com/can-a-mouse-survive-a-fall-from-a-...

That introduction Haldane quote: > You can drop a mouse down a thousand-yard mine shaft; and, on arriving at the bottom, it gets a slight shock and walks away, provided that the ground is fairly soft. A rat is killed, a man is broken, a horse splashes. "A horse splashes". That's some mental imagery right there.

Then I wonder what would happen if a Roc fell asleep midflight…

Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]

#98

Post by wholinator2 »

littlestymaar wrote: post #87
londons_explore wrote: post #47

Earlier quoted context omitted.

The fact that mice don't appear to deliberately jump off high things as a way to get down tells me that they probably do get hurt... Just because they don't fall super fast doesn't mean they don't get injured because they don't have as much distance to "drop and roll" like a human does.

> The fact that mice don't appear to deliberately jump off high things as a way to get down tells me that they probably do get hurt... It's not how this works, cats are decent swimmers yet they generally refuse to get anywhere close to water…

Well me too but if i could just jump off of stuff if be skipping the stairs a lot more often. I agree with the other person, seems logical to me that for a prey animal they'd be careful about changing their threat landscape too fast. Once you let gravity take over there's no telling where you'll land. You could roll right into a ditch or a cats paws. And maybe they actually do jump sometimes, but only when there's certainly no threat nearby, which would involve no human observers, or maybe seeing other mice where they plan to land.

And then there's the actual vision. Are mice known for being able to see long distance? One could posit, if not then most jumps would be leaps of faith into vague amorphous blobs, full of potential danger and impossible to triangulate or assess.

Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]

#99

Post by ksherlock »

gnicholas wrote: post #31

I came to leave a snarky joke comment about "in mice?", and then I remembered that mice don't actually need parachutes because their terminal velocity is roughly the same as a human using a parachute [1]. If someone actually ran the study with mice, they'd find that parachutes aren't necessary! 1: https://johnmjennings.com/can-a-mouse-survive-a-fall-from-a-...

In the first few days of their life, wood ducklings jump out of their nest and fall to the ground. If their nest is in man-made bird-box, that's probably a 4 foot drop into the water. If it's a natural nest in a tree, that might be a 50 or 60 foot drop onto the ground.

Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]

#100

Post by DrIronstein »

King-Aaron wrote: post #34
gnicholas wrote: post #31

I came to leave a snarky joke comment about "in mice?", and then I remembered that mice don't actually need parachutes because their terminal velocity is roughly the same as a human using a parachute [1]. If someone actually ran the study with mice, they'd find that parachutes aren't necessary! 1: https://johnmjennings.com/can-a-mouse-survive-a-fall-from-a-...

That introduction Haldane quote: > You can drop a mouse down a thousand-yard mine shaft; and, on arriving at the bottom, it gets a slight shock and walks away, provided that the ground is fairly soft. A rat is killed, a man is broken, a horse splashes. "A horse splashes". That's some mental imagery right there.

For science. https://www.youtube.com/watch?v=y4VmVDl8AkI
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