Re: NR locos

["deano" <dsma@pigpond.com>]

I've just finished reading the article in RD April re the NR class and it
has a side note regarding
Tractive Effort and it notes that the Effort is limited by weight and Cd of
the wheel/rail interface.
They state that the Tractive Effort is limited to approx 35 tonnes. This
raised a further question
for me. If wheelspin was not an issue, just how much tractive effort could a
loco of this size
actually produce. Any ideas?? I'm guessing about 45 tonnes based on the
weight of the US
parent design. Interestingly a Boeing 747 engine on a 400 series aircraft
also produces 35 tonnes
of thrust so a 747 and 4 NR class locos would be closely matched in tractive
effort.
malcolm's <kmalcolm@tpg.com.au> wrote in message
01bfa907$cfb564e0$351e3acb@keithm.commslab.gov.au">news:01bfa907$cfb564e0$351e3acb@keithm.commslab.gov.au...
> Since the NRs have EFI, then it would be easy to limit the fuel delivered
> to each cylinder and limit HP that way.
> --
> Dave Malcolm
>
> The Narc <gonoNOCRAP@bigpond.com> wrote in article
> <tcmlfsscqepn578r972nh2l3ang8h8rv10@4ax.com>...
> > On Mon, 17 Apr 2000 16:31:05 +1000, Rob Kearey <robk@powerup.com.au>
> > wrote:
> >
> > >Ben Armstrong wrote:
> > >
> > The NR locos have electronic fuel injection
> > >> Ben Armstrong                                         /
> > >
> > >Rob K
> >
> > Regards Paul Johnston (MNRC)
> >