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 21:06:14 GMT
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Reply-To:
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cmasi@cmasi.chem.AVOIDSPAMtulane.edu
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Viewed:
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1279 times
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Larry Pieniazek wrote:
snip stuff about footnoting
>
> On the single wheelset issue. The real Talgo has bars that tie one car
> to the next, and to various points on the wheelbracket. These bars,
> somehow, cause the wheelbracket to turn to the correct angle. Note that
> the two wheels are NOT on the same axle.
Right the wheels are not on the same axel. At first I thought this was so the
wheels could travel at different speeds, but differentials are not brought up
elsewhere in trains (are they) so I figured that couldn't be the reason. Then I
though maybe it is so they can lower the coach; if part of the coach can sit
between the wheels then the coach does not have to be as high fo the ground. Now
I am wondering does this mean that the wheels turn independently like the front
wheels of a car, or does the entire wheel set pivot about a center vertical axis.
>
> The Jaunary Trains points out that there are 14 connections between one
> car and the next if you count all the bars and links etc. Whew!
>
> --
> Larry Pieniazek http://my.voyager.net/lar
> FDIC Know your Customer is wounded, thanks to you, but not dead...
> See http://www.defendyourprivacy.com for details
> For me: No voyager e-mail please. All snail-mail to Ada, please.
> - Posting Binaries to RTL causes flamage... Don't do it, please.
> - Stick to the facts when posting about others, please.
> - This is a family newsgroup, thanks.
Taken from G. Benedikt Rochow's post
How about: on each bogie but the first/last, have 2 vertical axles, one
for each car; each with a 24t gear (the 2 of which are meshing).
Mount the 2 cars using that bogie (or their pendulum bases, rather) on
these 2 axles, and the bogie will always be at the midpoint of their
relative angle. That's still not perfectly in line with the track
at all times, but closer than being locked to one car.
| | | axles for cars to sit on
-ggg-GGG- g, G the 2 gears
===== - the gears' teeth
ooo = top of bogie where axles stick into; needs
ooooo to be repeated above gears
ooo o side of one of the track wheels.
G?
The axels holding the gears would be locked at the connection to the coach and
pivot at the connection to the wheelset? This may work because any change in the
position of the wheelset from perpendicular to the track postion would encouter
resistance because the coaches either have to stay in a straight line or the ends
must move in the same direction.
You know...the pendular system is a wierd system. As Eric points out the
Metroliner he designed moves the center of gravity of the train inward so the
force of the turn translates to the track well. The pendular systme moves the
center of gravity out away from the track. Last time I watched side car motor
cycle racing (those crazy #%&@)$!s ) the guy on the side car wasn't swinging to
the outside of the curve! I can see why the Pendular system would be more
comfortable for the passenger, and since the center of gravity is lower than a
traditional coach the Pendular coach should corner better than a traditional
coach, but aside from lowering the center of gravity wouldn't the pendulum action
hamper turning speed?
Finding a solution will be difficult, but finding one that looks good is going to
be very difficult. Anyway, I was just talking about the dual wheelset shared
bogie trains. I did not know about the single wheelset trains.
Later,
Chris
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Message has 3 Replies:
 | | Re: high speed railways and strange flat bed cars
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| (...) That is in fact the reason that they are separate. If they are on a common axle, the outer wheel tends to want to climb up and rub the flange against the inner side of the rail (remember, train wheels have a tapered profile, the diameter on (...) (25 years ago, 23-Mar-99, to lugnet.trains)
| | | Re: high speed railways and strange flat bed cars
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| (...) the (...) encouter (...) ends (...) Exactly; rather than the wheelset turning the cars, the first car to enter a curve (or leave it) turns against the "stationary" second car, while the wheelset turns "half as fast", or to half the angle, (...) (25 years ago, 23-Mar-99, to lugnet.trains)
| | | Re: high speed railways and strange flat bed cars
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| Christopher Masi wrote in message <36F6B0BC.62F3D5E@cm...ne.edu>... (...) the (...) up (...) The only place I have ever seen differentials mentioned was in relation to geared locomotives like Shays, Climaxes, and Heislers. I think it was Shay who (...) (25 years ago, 24-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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| (...) 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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