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Subject: 
Re: A4 Class Locomotive teaser & Wheel count designations
Newsgroups: 
lugnet.trains
Date: 
Wed, 26 May 1999 02:55:16 GMT
Viewed: 
742 times
  
On the contrary, this isn't ludicrous at all.  It's a great idea!  Why hasn't
it been done before.  Build a circle of track with sixteen sections of track.
Make a train car using four train motors separated by 90 degrees each.  Fill in
the entire middle with bricks plates etc.  And what do you have?  A 26"
diameter rotating platform.  Cool!  You could put a building, or play scene on
it and have the whole thing rotate around.  Or, if you have a 26" long
millennium falcon model, put it on top.  That would be a cool display.

The structure would need to be relatively robust and may require some trusses
if you want a pretty heavy load, but it should be very doable.

Hmmm, I just might have to try it.

Thanks for the idea James!

Ben

In lugnet.trains, James Mathis writes:
<snip>

The ludicrous extreme is a wagon plate that is equal in length to the diameter
of a LEGO train circle!  Put the outer wheelsets at the ends of this way too
long wagon plate with a central wheelset at the midpoint of the wagon plate.
OK?  Place this hypothetical way to long train on a LEGO train track circle:
So, the two outer wheelsets are opposite one another across a diameter of the
circle of track, and the middle wheelset is at a mid-point along a semi-circle
of the circle of track.  OUCH! The two end wheelsets are at 180 degrees with
respect to one another (90 degrees with respect to the wagon plate; the wagon
plate crosses a diameter of the circle of track.), and they are at 90 degrees
with respect to the middle wheelset axle.  A line drawn between an end • wheelset
and the central wheelset makes a 45 degree angle with respect to either axle.

James Mathis



Message has 1 Reply:
  Re: A4 Class Locomotive teaser & Wheel count designations
 
(...) Put some wheeled supports in the middle of the circle. That's assuming the height of track + motor is equal to the height of wheels + some number of bricks. Steve (25 years ago, 26-May-99, to lugnet.trains)

Message is in Reply To:
  Re: A4 Class Locomotive teaser & Wheel count designations
 
(...) I look forward to seeing it. (...) Correct: the two end wheelset pivot and the central wheelset translates perpendicular to the track. However, the central wheelset can actually pivot to some degree. I believe that the photos at my website (...) (25 years ago, 26-May-99, to lugnet.trains)

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