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(TreeHugger)   Does the world really need a modern elevator that can go 40 miles per hour?   ( treehugger.com) divider line
    More: Unlikely, Miles per hour, elevator, Kinematics, surprisingly cutthroat race, fastest elevator, Adam Taylor, Shanghai Tower elevator, new elevator  
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3584 clicks; posted to Main » on 12 Jan 2017 at 5:39 AM (40 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



77 Comments     (+0 »)
 
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2017-01-12 12:33:22 AM  
The faster elevator just keeps accelerating until it reaches top speed and then has to start decelerating.

It's an elevator dropship!

s-media-cache-ak0.pinimg.com

For non-BT nerds, dropships in Battletech normally produce artificial gravity by firing their engines for the entire trip. The first half they accelerate towards the destination, then they flip, and decelerate for the second half.
 
2017-01-12 01:48:36 AM  
The answer, Subvy, is clearly yes.
 
2017-01-12 02:27:13 AM  
As long as it goes to space I'm OK with it.
 
2017-01-12 04:56:34 AM  
That all depends on which weapon you prefer.

  img.fark.net
 
2017-01-12 05:48:16 AM  
Subby, you know how I know you don't work above the 20th floor of a building?
 
2017-01-12 05:49:08 AM  
Might be useful once in a while.


img.fark.net
 
2017-01-12 05:58:20 AM  
40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.
 
2017-01-12 06:03:02 AM  

Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.


That's not how gravity works...
=Smidge=
 
2017-01-12 06:03:09 AM  

Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.


That would be a childhood dream realized.
 
2017-01-12 06:05:07 AM  

Smidge204: Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.

That's not how gravity works...
=Smidge=


Uh...that's exactly how gravity works.
 
2017-01-12 06:08:39 AM  

Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.


How many meters per second is that?
 
2017-01-12 06:11:11 AM  

Smidge204: Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.

That's not how gravity works...
=Smidge=


Also...
img.fark.net
 
2017-01-12 06:12:01 AM  
Do you not want space elevators subby?!  WE NEED EVEN FASTER!
 
2017-01-12 06:13:26 AM  

Smoking GNU: Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.

How many meters per second is that?


It would require you to accelerate at around 9.8m/s2.
 
2017-01-12 06:17:12 AM  

lostcat: Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.

That would be a childhood dream realized.


Me as a kid. 1970's. St. Francis hotel in San Francisco. Exterior glass elevators. I'd "Ride" the elevators. If it went from the top to the bottom nonstop. Jump up a few floors down and it took twice as long to land on the elevator floor. I might have cut school to do that a few times.

I mention the glass part because if it was raining we were going almost as fast as a raindrop. That fascinated me as a kid because you could see how a raindrop looked as it fell.
 
2017-01-12 06:22:21 AM  

Radioactive Ass: I mention the glass part because if it was raining we were going almost as fast as a raindrop. That fascinated me as a kid because you could see how a raindrop looked as it fell.


Hell, I'd do that now as an adult
 
2017-01-12 06:37:43 AM  

Smoking GNU: Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.

How many meters per second is that?


18 m/s.
 
2017-01-12 06:38:41 AM  
img.fark.net
 
2017-01-12 06:41:26 AM  
vignette1.wikia.nocookie.netwww.pushclicktouch.com
How about either of these instead?
 
2017-01-12 06:41:53 AM  

Sid_6.7: The faster elevator just keeps accelerating until it reaches top speed and then has to start decelerating.

It's an elevator dropship!

[s-media-cache-ak0.pinimg.com image 564x415]

For non-BT nerds, dropships in Battletech normally produce artificial gravity by firing their engines for the entire trip. The first half they accelerate towards the destination, then they flip, and decelerate for the second half.


Nerd here who digs that kind of thing, but why not just mag-lock your bots down and to hell with all the flippy spinny part? I mean it's not like you have to keep everyone happy as they stroll the grand promenade.
 
2017-01-12 06:46:03 AM  

lostcat: Smidge204: Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.

That's not how gravity works...
=Smidge=

Uh...that's exactly how gravity works.


gravity is about acceleration not velocity.
this is actually mentioned in the article
the quoted 1.5 meters per second per second maximum acceleration is much less than the 9.8 needed to simulate free fall.
 
2017-01-12 06:47:24 AM  
Howabout no, we do not need a 40 mph elevator.
 
2017-01-12 06:50:12 AM  

Raddamant: Radioactive Ass: I mention the glass part because if it was raining we were going almost as fast as a raindrop. That fascinated me as a kid because you could see how a raindrop looked as it fell.

Hell, I'd do that now as an adult


It's a blob of water. A blob that has a lot of shimmying and shaking. That's not to say that it's not worth seeing because I think that observation is worthwhile so go observe. But it's going to be a blob of water.
 
2017-01-12 06:52:34 AM  
I have this vision of everyone in the elevator with their pants down to their ankles during acceleration.
 
2017-01-12 06:57:05 AM  

lostcat: Uh...that's exactly how gravity works.


Gravity has units of acceleration, not speed. It doesn't matter how fast you go, gravity will still exert the same amount of force (barring a significant change in distance from the planet's center, anyway).

What matters is the acceleration. 9.8 m/s is roughly 20 mph, so the local acceleration due to gravity is 9.8 m/s^2 which would be 20 mph/sec. So as long as this elevator takes more than about 2 seconds to reach that 40mph you won't be "weightless." You'll feel it, but your feet won't leave the floor.

And once you're at speed, a steady 40 mph, you wouldn't be able to tell the difference between that and a a stationary elevator.
=Smidge=
 
2017-01-12 07:01:18 AM  

lostcat: Subby, you know how I know you don't work above the 20th floor of a building?


Elevators in tall buildings are usually pretty fast. The ones that drive me nuts are the (presumably hydraulic) elevators in 3-4 story buildings that are literally slower than the stairs.

And before anyone says it, yes, there are valid reasons to take an elevator from time to time in a small building.
 
2017-01-12 07:11:30 AM  

Smidge204: lostcat: Uh...that's exactly how gravity works.

Gravity has units of acceleration, not speed. It doesn't matter how fast you go, gravity will still exert the same amount of force (barring a significant change in distance from the planet's center, anyway).

What matters is the acceleration. 9.8 m/s is roughly 20 mph, so the local acceleration due to gravity is 9.8 m/s^2 which would be 20 mph/sec. So as long as this elevator takes more than about 2 seconds to reach that 40mph you won't be "weightless." You'll feel it, but your feet won't leave the floor.

And once you're at speed, a steady 40 mph, you wouldn't be able to tell the difference between that and a a stationary elevator.
=Smidge=


That's exactly why I mentioned the first few floors of downward acceleration. Been there and done that. Once at a constant speed it's exactly what you're saying. But going from zero to forty (or whatever) has a gravity difference (that's perceived, not real, gravity never changes). Upwards isn't really an issue as long as it's gradual. The same applies to going downwards. My point was that if downwards accelerates beyond 32 ft per second per second you will be essentially weightless.
 
2017-01-12 07:14:10 AM  
All elevators take exactly the same amount of time to go from the bottom to the top floor, in my observation. Check it out; if you're in a three-story building, the elevator will be incredibly slow, while in a 100-story building, ti will be super fast. I'm pretty sure I can get to the observation deck of the Empire State building in the time it takes for the hydraulic-lift elevator in a two-story office building I used to visit to get to the second floor.
 
2017-01-12 07:15:12 AM  

dukeblue219: lostcat: Subby, you know how I know you don't work above the 20th floor of a building?

Elevators in tall buildings are usually pretty fast. The ones that drive me nuts are the (presumably hydraulic) elevators in 3-4 story buildings that are literally slower than the stairs.

And before anyone says it, yes, there are valid reasons to take an elevator from time to time in a small building.


See my post above. I call this the Law of Elevator Conservation.
 
2017-01-12 07:33:19 AM  
It's not making it close to that speed if I get in and play with the buttons.

img.fark.net
 
2017-01-12 07:36:09 AM  
I was in an elevator purported to be the fastest in Vegas.
40kph.

The lady in the elevator with me said she could get me off before I got off on my floor.

I still miss that damn kidney.
 
2017-01-12 07:50:47 AM  
Do they have those in Otisville?
 
2017-01-12 08:03:21 AM  
Yes.

Free amusement park rides!
 
2017-01-12 08:05:57 AM  

lostcat: Smidge204: Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.

That's not how gravity works...
=Smidge=

Also...
[img.fark.net image 590x421]


3horn would like a word.
 
2017-01-12 08:11:33 AM  

Sid_6.7: The faster elevator just keeps accelerating until it reaches top speed and then has to start decelerating.

It's an elevator dropship!

[s-media-cache-ak0.pinimg.com image 564x415]

For non-BT nerds, dropships in Battletech normally produce artificial gravity by firing their engines for the entire trip. The first half they accelerate towards the destination, then they flip, and decelerate for the second half.


Seems like it would burn a lot of fuel...
 
2017-01-12 08:12:43 AM  

elkraf: I have this vision of everyone in the elevator with their pants down to their ankles during acceleration.


"Going up, sir."
img.fark.net
"Have a good day, sir."
Droopy Dog Fandub - Who Framed Roger Rabbit
Youtube Bmv9vy8FNXE
 
2017-01-12 08:15:49 AM  
media3.giphy.com

\somebody wake up Hicks.
 
2017-01-12 08:18:29 AM  
s-media-cache-ak0.pinimg.com
 
2017-01-12 08:39:52 AM  

Smoking GNU: Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.

How many meters per second is that?


Sorry, never learned any of that metric crap.  We never lost a war until military switched to metric.  But I can tell you that 40 mph is 4.3 rods per micro fortnight.
 
2017-01-12 08:47:40 AM  
Woo-Hoo! Elevator Races!

Great for rednecks relocated to the city. All the fun of a regular drag race in only 2% of the land.
 
OOF
2017-01-12 08:56:18 AM  
img.fark.net
 
2017-01-12 09:11:20 AM  
First we need to ramp up the speed of the paternosters to maximize the danger potential.

img.fark.net
 
2017-01-12 09:30:28 AM  

Gyrfalcon: Howabout no, we do not need a 40 mph elevator.


There's one in Taipei that averages 38 mph, which suggests its top speed is above 40 mph.

101 floors in 39 seconds.
 
2017-01-12 09:35:47 AM  

Smidge204: lostcat: Uh...that's exactly how gravity works.

Gravity has units of acceleration, not speed. It doesn't matter how fast you go, gravity will still exert the same amount of force (barring a significant change in distance from the planet's center, anyway).

What matters is the acceleration. 9.8 m/s is roughly 20 mph, so the local acceleration due to gravity is 9.8 m/s^2 which would be 20 mph/sec. So as long as this elevator takes more than about 2 seconds to reach that 40mph you won't be "weightless." You'll feel it, but your feet won't leave the floor.

And once you're at speed, a steady 40 mph, you wouldn't be able to tell the difference between that and a a stationary elevator.
=Smidge=


Dude...I studied physics in college. I didn't even bother readying your comment. I also didn't read the article. If you are in an elevator that accelerates at a rate equal to gravity it will effectively cancel out the acceleration due to gravity, allowing you to feel weightless. That is how gravity works...it's an acceleration of a mass towards another mass. Whether or not the elevator in question is allowed to accelerate at that rate is not relevant to how gravity works.
 
2017-01-12 09:39:31 AM  
I would say a modern elevator going that quick is OK. An ancient elevator going that quick, not so much.
 
2017-01-12 09:45:23 AM  

CodeMonkey4Life: lostcat: Smidge204: Radioactive Ass: 40 mph going up? Yes. 40 mph going down... uh, maybe not so much. It could be fun though if you want to experience weightlessness for a second or so.

That's not how gravity works...
=Smidge=

Uh...that's exactly how gravity works.

gravity is about acceleration not velocity.
this is actually mentioned in the article
the quoted 1.5 meters per second per second maximum acceleration is much less than the 9.8 needed to simulate free fall.


Yep, and in order to go from stationary to traveling speed, an elevator must accelerate. During that time the effect of gravity is canceled in direct proportion to the acceleration of the elevator (up to 9.8m/s2).

That's why you feel that funny feeling when the elevator starts to descend, but it goes away after a second or two as the elevator continues descending.

What part of "that's exactly how gravity works" are you arguing with?
 
2017-01-12 10:14:11 AM  
People here are confusing acceleration with velocity and it's painful to read. Smidge is right, everyone else is trying to say they were right, but they weren't.
 
2017-01-12 10:15:48 AM  
img.fark.net
 
2017-01-12 10:16:28 AM  

hawks9nkh: People here are confusing acceleration with velocity and it's painful to read. Smidge is right, everyone else is trying to say they were right, but they weren't.


Nope. Sorry. You're wrong.
 
2017-01-12 10:18:29 AM  

omg bbq: Sid_6.7: The faster elevator just keeps accelerating until it reaches top speed and then has to start decelerating.

It's an elevator dropship!

[s-media-cache-ak0.pinimg.com image 564x415]

For non-BT nerds, dropships in Battletech normally produce artificial gravity by firing their engines for the entire trip. The first half they accelerate towards the destination, then they flip, and decelerate for the second half.

Nerd here who digs that kind of thing, but why not just mag-lock your bots down and to hell with all the flippy spinny part? I mean it's not like you have to keep everyone happy as they stroll the grand promenade.


You want your mechwarriors losing bone density and muscle mass while also needing to readjust to gravity right at the moment you need them to fight?
 
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