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Japan starts space elevator experiments

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Re: Japan starts space elevator experiments

#21

The cars would travel at up to 200kph and arrive at the space station eight days after departure from Earth. These early cable experiments are important, but someone should also be working on the composing an 8 day Elevator Muzak score that won't drive you insane.

Music? The first four days will be safety announcements. The last four will be debates as to who is responsable for cleaning up all the vomit. A week of near-zero-g in a room with 30 people will not be fun.

[deleted]

Re: Japan starts space elevator experiments

#22

Earlier quoted context omitted.

Music? The first four days will be safety announcements. The last four will be debates as to who is responsable for cleaning up all the vomit. A week of near-zero-g in a room with 30 people will not be fun.

Is humor against HN rules? I regularly see such posts being downvoted and it doesn't make sense to me.

No, it’s not against the rules, but downvotes aren’t there to enforce the rules.

It’s just a culture thing. HN tends to be more news and factually focused than reddit/Twitter/etc. People here just prefer to stay on topic, especially since humor is very different between people and can be very hit or miss.

Re: Japan starts space elevator experiments

#23
post #4

The experiment sounds great. But should this work and a real cable to orbit is built, what happens when the cable snaps!? Can such a structure be made failsafe?

There are various simulations of what may happen. Here is one that demonstrates what may happen if the cable breaks at various points.

http://gassend.net/spaceelevator/breaks/

In summary, if the cable breaks at the base, the elevator will fly harmlessly into space. If it breaks at the counterweight, a large portion of the cable (several thousand miles long) will collide with the Earth’s equator.

Re: Japan starts space elevator experiments

#25

Carbon nanotubes are cool, but i will believe space elevators possible once someone shows me a carbon nanotube rope i can climb with. I'd settle for a bike or motorcycle chain. A nanotube-based shoelace would be worth a noble prize or two.

I don’t think rope is a good analogy for nanotubes. I think you want to see it used as a cable, like in suspension bridges or trawling. It should be something that is permanently under tension.

A nanotube suspension bridge would be pretty amazing to see.

Re: Japan starts space elevator experiments

#26

The cars would travel at up to 200kph and arrive at the space station eight days after departure from Earth. These early cable experiments are important, but someone should also be working on the composing an 8 day Elevator Muzak score that won't drive you insane.

I'm sure James Last's heirs will be happy to supply the required stock.

Re: Japan starts space elevator experiments

#27

The cars would travel at up to 200kph and arrive at the space station eight days after departure from Earth. These early cable experiments are important, but someone should also be working on the composing an 8 day Elevator Muzak score that won't drive you insane.

What is kph? I can't be 200 km per hour and have it take 8 days.

Re: Japan starts space elevator experiments

#28

The cars would travel at up to 200kph and arrive at the space station eight days after departure from Earth. These early cable experiments are important, but someone should also be working on the composing an 8 day Elevator Muzak score that won't drive you insane.

Weird to me that they aren't accelerating till the midpoint and then breaking till the destination at a constant 1g. Gets around the space sickness by providing artificial gravity and should take ~hours rather than ~days.

Re: Japan starts space elevator experiments

#29
> "...six oval-shaped cars, each measuring 18m x 7.2m holding 30 people, ... eight days ...."

Whooooa. Let's think about this for a second. Eight days means people need to sleep (and not just sitting up in a chair, no matter how comfy). At 1m x 2m per bed that would be a 15m x 4m space even without aisles to walk between the beds or down the middle or any sort of privacy separators. Also, a bathroom and actual washing facilities of some sort are mandatory, and a kitchen with at least minimal food-prep capabilities (even if it's mostly pre-made); modern airplane galleys only need to deal with trips in the tens of hours.

18m x 17.2m is really really not a lot of space for all that.

Re: Japan starts space elevator experiments

#30
For those looking for a popular culture examination of space elevators--albeit from a number of decades back--check out Arthur C. Clarke's The Fountains of Paradise. It also deals with some of the engineering issues, though again it's quite old.
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