Subject:
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Re: New train MOC pictures
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Newsgroups:
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lugnet.trains, lugnet.loc.uk
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Date:
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Wed, 7 Apr 2004 22:06:40 GMT
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Viewed:
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4741 times
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In lugnet.trains, Larry Pieniazek wrote:
> In lugnet.trains, Mark Bellis wrote:
> > Perhaps someone would like to make an
> > Acela train with a similar feature? I might have a go when I get more into
> > American trains. I have just a couple of doodles ATM.
>
> Bevel gears? WAY overengineered. Someone did a tilting metroliner that uses no
> gears at all, just slanted truck mounts. VERY clever. This was at least 3 years
> ago IIRC...
>
> I am 80% sure (but not 100%) it was either E. Brok or J. Mathis.
Larry, you wanted to see some more pictures of the Pendolino. Tony Priestman
took this last year, showing the bevel gear mechanism at each end of each coach:
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=334088
The 6-wide frame doesn't tilt, but supports the bogie below and the body either
side. An extended axle goes from here to the middle of the coach.
In the middle a set of 4 bevel gears makes the body act like the differential
gear of a car, tilting by the average amount of turn of the two bogies. To take
up the play in the cogs I put a weight block under the middle of the coach, to
help bring it back to level on the straights.
The tilt on it is about 8 degrees on an 80ft radius curve (in 8mm:1ft scale),
which is alternate straights and curves. It won't go round anything tighter,
but was really made to go at speed round 120ft radius curves, made from
alternating a curve and 2 straights. It will do up to 80mph scale speed round
these curves, but it really needs smoother wide curves to go any faster.
Mark
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Message is in Reply To:
 | | Re: New train MOC pictures
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| (...) Bevel gears? WAY overengineered. Someone did a tilting metroliner that uses no gears at all, just slanted truck mounts. VERY clever. This was at least 3 years ago IIRC... I am 80% sure (but not 100%) it was either E. Brok or J. Mathis. (20 years ago, 30-Mar-04, to lugnet.trains, lugnet.loc.uk)
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