 | | Re: high speed railways and strange flat bed cars —Steven Barile
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| | | Just a copuple weeks ago I took the train from Portland to Seattle. It s was the Amtrak (Talgo) passenger train. It has only one axle between cars. I tried to find some pics but ran out of time here is a URL (URL) plan to make one, I think this one (...) (26 years ago, 18-Mar-99, to lugnet.trains)
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| | | | | Re: high speed railways and strange flat bed cars —Christopher Masi
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| | | | | (...) Some very fancy engineering...you are not kidding. The car has to swing like a pendulum (or would LEGO shock absorbers have enough give to allow the the bottom of the car to swing out--maybe weights would help by adding a bit more inertia for (...) (26 years ago, 18-Mar-99, to lugnet.trains)
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| | | | | | | Re: high speed railways and strange flat bed cars —James Mathis
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| | | | | | (...) tried (...) some (...) bottom (...) all (...) Found this web page that looks promising for some "engineering-ish" drawings and explanation of the Talgo car coupling and pendulum swaying. (URL) Mathis (...) (25 years ago, 16-Nov-99, to lugnet.trains)
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| | | | | Re: high speed railways and strange flat bed cars —Ben Fleskes
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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 (...) (26 years ago, 21-Mar-99, to lugnet.trains)
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| | | | | | Re: high speed railways and strange flat bed cars —Christopher Masi
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| | | | | I think you are right, the "steering" of the single wheelset must be linked to the swinging of the car. The weight of the cars would hold the wheelset straight, but as the train goes into the curve the swinging action would cause the wheelset to (...) (26 years ago, 22-Mar-99, to lugnet.trains)
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| | | | | | Re: high speed railways and strange flat bed cars —Eric Brok
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| | | | Ben Fleskes wrote in message ... (...) *single* (...) to (...) made (...) rotation (...) with a (...) allowed (...) derail. (...) Actually, the Talgo trains do *not* pivot inward (like your model does, and my version of the Metroliner [1] [2]), but (...) (26 years ago, 22-Mar-99, to lugnet.trains)
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| | | | | | (canceled) —Christopher Masi
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| | | | | | Re: high speed railways and strange flat bed cars —Christopher Masi
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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 (...) (26 years ago, 22-Mar-99, to lugnet.trains)
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| | | | | | | Re: high speed railways and strange flat bed cars —Eric Brok
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| | | | | | Christopher Masi wrote in message <36F65C5C.414FB274@c...ne.edu>... (...) act (...) swing (...) go (...) The main difference: with leaning inward, the lean angle has to be mechanically induced by turning the bogies, while in the pendulum structure, (...) (26 years ago, 22-Mar-99, to lugnet.trains)
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| | | | | | | | Re: high speed railways and strange flat bed cars —Gregor Benedikt Rochow
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| | | | | | (...) 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 (...) (26 years ago, 22-Mar-99, to lugnet.trains)
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| | | | | | Re: high speed railways and strange flat bed cars —Larry Pieniazek
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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 (...) (26 years ago, 22-Mar-99, to lugnet.trains)
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| | | | | | Re: high speed railways and strange flat bed cars —Christopher Masi
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| | | | Larry Pieniazek wrote: snip stuff about footnoting (...) 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 (...) (26 years ago, 22-Mar-99, to lugnet.trains)
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| | | | | | Re: high speed railways and strange flat bed cars —Larry Pieniazek
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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 (...) (26 years ago, 23-Mar-99, to lugnet.trains)
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| | | | | | Re: high speed railways and strange flat bed cars —Gregor Benedikt Rochow
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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, (...) (26 years ago, 23-Mar-99, to lugnet.trains)
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| | | | | | Re: high speed railways and strange flat bed cars —Frank Filz
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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 (...) (26 years ago, 24-Mar-99, to lugnet.trains)
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