From: lfsheldon@gmail.com

On 5/19/2014 10:11 AM, Charles Ellson wrote:
> On Sun, 18 May 2014 22:20:53 -0700, Glen Labah 
> wrote:
>
>> In article ,
>> Larry Sheldon  wrote:
>>
>>> I have been studying all the pictures you nice people have pointed to
>>> and I for the life of me see were the articulation "hinges" are nor how
>>> they "work".  From the pictures, it looks like any articulation will
>>> have one or more drivers fouling the boiler chassis.
>>
>>
>> It really isn't very obvious, but on the larger Garratt locomotives the
>> frame split is almost always above the 3rd driving axle.  Then, the
>> upper body may or may not have some overhang one way or the other.
>>
>> It is probably best to see a model of one run, as that gives you sort of
>> an above the model look as it goes around curves.  This is the best I
>> could find so far, of a British 2-6-0+0-6-2:
>>
>> http://www.youtube.com/watch?v=mYlM-9j1AQI
>>
> "Hinge" and "frame split" could be slightly misleading, they don't
> bend in the style of e.g. some double-section electric and diesel
> locomotives but instead involve overlapping sections. There are three
> main sections - two engines with the cab/boiler suspended between and
> overhanging both of them.
> The second and third rows of this drawing show the pivot points on a
> SAR 400 class :-
> http://www.johnnyspages.com/rail_dittys_files/garratt_diagram.gif
>

OK.  I think I had the pivot thing figured out (vice "hinge") bout it
didn't (and still doesn't!) look like that driver can swing far enough,
but I guess it does.  I assume that the bogey (pilot?  ??) next to the
driver under the boiler (when provided) swing with the drivers?  Seems
like it must else why have it?

Thanks a lot.

I can't believe I had never heard of them before.  I've long said it was
a bad day that I don't learn something--this has been a real treat.

--
Idioten aangeboden. Gratis af te halen.
h/t Dagelijkse Standaard

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