Re: GNR GM's

[gioia9499@my-dejanews.com]

In article <mauried.530.360D9C07@commslab.gov.au>,
  mauried@commslab.gov.au (Maurie Daly) wrote:
> In article <6uire1$ptr$1@nnrp1.dejanews.com> gioia9499@my-dejanews.com writes:
> >From: gioia9499@my-dejanews.com
> >Subject: Re: GNR GM's
> >Date: Sat, 26 Sep 1998 13:49:53 GMT
>
> >In article <01bde87b$25c179e0$1612868b@rod>,
> >  "Rod" <berlina@bigpond.com> wrote:
> >>
> >> Interesting happenings at V/Line......
> >> Forced to return LongTerm Leased G Cllases to National Rail  [National Rail
> >> won their appeals]. This exasperates V/Lines ambitions to spread
> >> Interstate, and will increase the Heavy G Class work loades, possibly to
> >> breaking point.
> >> The Union has invited management to talk with GN, with a view to leasing
> >> surplus Locos. Could be a means of gainfully employing the GM's to release
> >> GM's from wheat
> >> for the InterState runs.......only my speculation though!
> >>           By the way, the EL's in South Australia, built for High Speed
> >> Pass Haulage in
> >> flat T.A.R territory, are unsuitable for modification. They are wired
> >> lightly, fitted with small Traction Motors, loose their feet very easily,
> >> are fitted with heat sensing equipment which shut down traction motors as
> >> soon as they are at all stressed....or so our boffins are saying
>
> >  Rod,  this sounds like the usual garbage that a manager with no knowledge
> >of locomotives would tell staff. The issue of heat sensing equipment is
> >absolute garbage and all sensing circuitry on any microprocessor controlled
> >unit like the EL class can be easily changed by altering the perameters of
> >the units software. The reality is that VLF don't want to buy them for the
> >same reasons as every one else. Why not buy or lease other units like the
> >Westrail L class. They were used in Victoria some years back to relieve
> >shortages. Also Silverton would only be too happy to lease out all their 442
> >class units. The problems that VLF will now find is that because they are
> >competing against Freightcorp, NRC and others they are suddenly left out in
> >the cold as none of these others want to help. Cheers Bob
>
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>
> Heres a bit more info about the ELs regarding the alleged light footedness.
> Goninan rate the ELs at
> Starting Tractive effort at 308 kn
> Continuous Tractive effort of 197 kn at 34 km/h.
> Rated HP 2380 KW.
> Whilst these figures arnt brilliant for a 3000 HP loco they also arnt useless
> either.
> Lets make some comparisons .
> 81 / G / BL which is what presumably they would be replacing.
> Starting Tractive effort 400 kn
> Continuous Tractive effort 337 kn @ 20 km/h
>
> So obviously an EL cant haul as much as a G / 81 ,but it can still haul a
> reasonable load , around the same or slightly more than a 422 / X / 80 .
> The axle load of 19 tonnes is light for a 3000 HP loco but consistant with its
> tractive effort and still heavier than a 422 / X / 80.
> I guess it really depends on what interstate markets Vline freight wants to
> branch into.
> If Vline freight still have any Ts then an EL + T combination would get close
> to a G .
> Is it all all possible to replace the GE traction motors with EMD -77 series
> motors, then you be getting close to VLF N type performance.

     Yes it is possible to fit EMD D77 traction motors to other non GM units
like AN did to the BU class slugs. This is not needed however as there is
nothing wrong with the GE761-ANR1 traction motors fitted to the ELs.
Consider this

Class      Traction motors   Engine        Tractive effort     Weight
EL         GE761-ANR1        GE7-FDL12     197KW               114T
2800 (QR)  GE761-ANR1        GE7-FDL12     266KW               116T

The difference is in the gearing of the traction motors.
Cheers
Bob
P.S. I hear that QR may be interested in buying some of the stored ELs. Has
anyone else heard this?
Cheers
Bob

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