News for hackers. Stuff that matters.

A comment on German students win hyperloop competition, reaching 200 mph. Parent comment

Re:German students win hyperloop competition, reaching 200 mph by adrianN on Monday August 28, 2017 @12:21PM (#15117715)
If you want to go very fast you can basically only go in a straight line and you need a long time for accelerating and braking. G-Forces on passengers are fairly limited, typically to around 1m/s^2.
[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by Robotbeat on Monday August 28, 2017 @12:27PM (#15117780)
Much more than that (~4m/s^2) is experienced nominally by jet liner passengers.

Roller coasters do 50-60m/s^2.

I don't think this is a major problem. Just accelerate slower.

[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by tigershark on Monday August 28, 2017 @12:52PM (#15118051)
Source? From what I know 6g is the realm of anti-g suit, it seems quite strange to me that it is deemed normal in an attraction used also by children.
[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by wlesieutre on Monday August 28, 2017 @12:59PM (#15118117)
Google's search result blurb says:

> Tower of Terror holds the record for most G-force on any roller coaster in the world, an intense 6.3G. This is nearly twice the amount that the average astronaut experiences when making their way through the atmosphere.

So world record for a roller coaster was ~60 m/s2, and that was presumably for a very short duration.

On a transit system you don't want roller coaster style restraint systems so g-forces have to be much much lower.

Some people might be into "ride a roller coaster from NYC to Boston" but that sounds like a niche market to me.

[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by beamatronic on Monday August 28, 2017 @01:18PM (#15118279)
To clarify the referenced ride is in Gold Reef City in South Africa and is not the same as the Twilight Zone Tower of Terror at Disneyland
[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by dawnerd on Monday August 28, 2017 @04:12PM (#15119693)
> Twilight Zone Tower of Terror at Disneyland

Which doesn't exist anymore. It's now a Guardians of the Galaxy ride (much better IMO).

[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by rhcom2 on Monday August 28, 2017 @06:47PM (#15120776)
In California. It still exists in Florida.
[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by King-Aaron on Monday August 28, 2017 @08:55PM (#15121390)
Just to add, a competition Jetsprint Boat can pull 7G's in the corners... And that's pretty intense.

https://www.knfilters.com/news/news.aspx?id=1444

[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by dmytroi on Monday August 28, 2017 @01:00PM (#15118120)
It highly depends on a direction, see https://en.wikipedia.org/wiki/G-force#/media/File:Human_line...
[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by InclinedPlane on Monday August 28, 2017 @05:16PM (#15120140)
That's sustained 6g. Momentary 6g is easy to deal with. But it's not like most people will be experiencing such accelerations in a transportation setting normally.
[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by blktiger on Monday August 28, 2017 @01:24PM (#15118341)
6 _sustained_ gs would require a g-suit, but for very brief durations it's not bad. It would be very uncomfortable for passengers though.
[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by Robotbeat on Monday August 28, 2017 @12:57PM (#15118092)
Humans are pretty tough, it turns out. And people often are overly conservative in these kinds of discussions.

http://rollercoaster.wikia.com/wiki/Highest_G-Force_on_a_Rol...

[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by adrianN on Monday August 28, 2017 @01:12PM (#15118238)
Maybe you don't want to have a transportation system that is as uncomfortable to ride as a rollercoaster. You might want to be able to transport frail elderly people and small children as well.
[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by Robotbeat on Monday August 28, 2017 @01:30PM (#15118407)
This is a test track and a competition. Nobody is claiming to build a passenger hyperloop with these accelerations except for fun.
[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by NegativeK on Monday August 28, 2017 @01:44PM (#15118539)
270mph is 120 m/s. Two minutes of acceleration.
[ Parent | on HN ]
Re:German students win hyperloop competition, reaching 200 mph by Robotbeat on Monday August 28, 2017 @01:50PM (#15118596)
Passenger jets take off at more like 4m/s^2.
[ Parent | on HN ]