• Als Spam markieren
• Beitrag melden

• 
  Diese Gruppe Alles

• Archiv
• RSS-Feeds

• Kontakt
• Hilfe
• Impressum
• Datenschutz

Re: Locomotives for Fife circle services?

On 18 May, 14:41, WZR <inva...@invalid.com> wrote:
> On Sat, 17 May 2008 07:32:12 -0700 (PDT), kevall...@holdthefrontpage.co.uk
> wrote:
>
> > On 17 May, 14:49, WZR <inva...@invalid.com> wrote:
>
> >> I must say my understanding is the same as exjims, that the air control
pipe
> >> conveys the throttle setting from the 'driven' loco to the other(s), this
> >> being controlled by a proportional valve on the bottom of the power handle
> >> shaft.  If there is no air connection, how is this information conveyed?
>
> >> Blue Star is described as "electro-pneumatic", omitting the air
connection
> >> would make it just "electro".
>
> > It's been tested empirically.
>
> Maybe, but you haven't explained how.
>
> I have access to an electrical manual and wiring diagrams for a Blue Star
> loco and it clearly refers to the power contol signal being transmitted by
> air (even within a loco operating singly).  There is no mention, either in
> the text or diagrams, of an alternative system for transmitting power
> control electrically, other than a simple on/off.
>
> From the manual, Wire 6, energised between ON and FULL, has the effect that
> "ESV and E1 therefore close... ...ESV setting up the governor to allow the
> engine speed to rise above idling, according to the setting of the governor
> /which is controlled by an air pressure signal from the controller which is
> proportioned to the movement of the power handle/.". [my italics]
>
> So, I'll ask again, in the absence of the air signal, how does the governor
> on the 'slave' loco know how (and by how much) to adjust the fuel delivery?
>
> --
> WZR

Because each loco still provides it's own Regulating Air, with the
systems on the two locos equalised via the white pipe.  Which locos
does your manual refer to, by the way?  I ask because, while all Blue
Star locos are - obviously - compatible - there are significant
differences in how things happen (notably, for example, between EE
locos and others).

Antworten