Subject:
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Re: high speed railways and strange flat bed cars
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Newsgroups:
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lugnet.trains
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Date:
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Mon, 22 Mar 1999 07:29:51 GMT
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Viewed:
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1154 times
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Ben Fleskes wrote in message ...
> What makes the Talgo train a challenging model is not only the common • *single*
> wheelset between cars, but that the cars pivot inward when rounding curves • to
> allow a higher speed and more comfortable ride for the passengers. I've • made
> cars that will pivot inward with double wheelsets by translating the • rotation
> of the wheelset to pivot the car above inward. But when you are working • with a
> single wheelset, it has to be locked to the chassis of the car and not • allowed
> to pivot. If a single wheelset can pivot, it will quickly go askew and • derail.
>
Actually, the Talgo trains do *not* pivot inward (like your model does, and
my version of the Metroliner [1] [2]), but the bottom sways outward like a
pendulum. This is an interesting alternative, demanding a very different
approach mechanically (the cabins hanging on pillars).
Also note, that this does not prevent the train from tipping over as well as
the former approach. It does alleve the side-forces on the passengers, but
as soon as the cabin sways behind a critical point, the train will tip over
fiercefully.
Eric Brok
[1] http://www.svc.fcj.hvu.nl/brok/legomind/models select from menu: Trains,
Leaning in curves
[2] [1] was my first footnote to a news article :-)
Eric Brok
Visit LEGO ON MY MIND:
http://www.svc.fcj.hvu.nl/brok/legomind
Mindstorms/Mind Control section:
http://www.svc.fcj.hvu.nl/brok/legomind/robo
Dutch section:
http://www.svc.fcj.hvu.nl/brok/legomind/nl
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Message has 3 Replies:
 | | Re: high speed railways and strange flat bed cars
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| Eric, If the pivot point on you model was moved to the top then you train would act like a Talgo train. Instead of the top moving inward, the bottom would swing out. The swing of the cars has to be translated to a bending of the joint between the (...) (25 years ago, 22-Mar-99, to lugnet.trains)
| | | Re: high speed railways and strange flat bed cars
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| (...) THIS.........^^^ is a footnote error. A footnote to a footnote belongs in the footnote text, not after the first footnote reference (...) Like this.........^^^ (...) &&& *** &&& - use a different marking scheme for the footnote listing (...) (25 years ago, 22-Mar-99, to lugnet.trains)
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Message is in Reply To:
| | Re: high speed railways and strange flat bed cars
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| What makes the Talgo train a challenging model is not only the common *single* wheelset between cars, but that the cars pivot inward when rounding curves to allow a higher speed and more comfortable ride for the passengers. I've made cars that will (...) (25 years ago, 21-Mar-99, to lugnet.trains)
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