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Subject: 
Re: APT tilts thru curves in Real-Build ABS form
Newsgroups: 
lugnet.trains
Date: 
Mon, 25 Jun 2001 22:56:16 GMT
Viewed: 
2220 times
  
"James Mathis" <thakius@nmt.edu> wrote in message
news:GFI7GG.36J@lugnet.com...

> 1) The train cars do indeed tilt through curves.  The pendular axis of
> rotation is just below the roof-line; thus, the car bodies swing "out"
> rather than tip "in". I'm not sure that is the best way to describe this
> motion???

That seems to make sense. CN's original "Turbo" exhibited this
characteristic; today, the TALGO tilting trainsets also tilt this way. I
don't know of a lot of passive systems able to tilt inward; but I think that
ABB's trapezoidal linkage leans more toward the centre, while remaining
inherently passive...

(does that make sense? From a physics standpoint, maybe it doesnt...! I'm
not sure.)

> 3) The height of the train is equivalent to a standard official LEGO
> passenger train.

That's really amazing! That's fantastic you're able to fit the hardware into
such a compact space.

> I found it a little difficult to photograph the tilt.  I hope some of the
> pictures convey that it really is tilting!

I supose this picture exhibits it the best:

http://www.brickshelf.com/cgi-bin/gallery.cgi?i=51171

Is that the appr. maximum tilt angle achieveable? I'm very intrigued by your
pendular mechanism. :)

Again, James, you amaze me! Thanks for sharing your brilliant work.

    Iain



Message has 1 Reply:
  Re: APT tilts thru curves in Real-Build ABS form
 
(...) I'm actually very ignorant as to how the real APT tilts. What little I do know makes me think that the pendular axis is very low; maybe just above the bogie near the floor? I think the APT used a very active forced-tilt with some kind of (...) (25 years ago, 25-Jun-01, to lugnet.trains)

Message is in Reply To:
  APT tilts thru curves in Real-Build ABS form
 
My attempt to model the British Rail Advanced Passenger Train set is progressing. The "real-build" ABS consist is: 1. cab unit (driver trailer second) 2. passenger car (trailer second) 3. passenger car (trailer brake first) 4. motor unit (non (...) (25 years ago, 25-Jun-01, to lugnet.trains) ! 

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