Re: XPT tractive effort curves

[dbromage@fang.omni.com.au (David Bromage)]

Maurie Daly (mauried@commslab.gov.au) wrote:
> In article <iJES2.11$Qv4.467472@news0.optus.net.au> dbromage@fang.omni.com.au (David Bromage) writes:
> >From: dbromage@fang.omni.com.au (David Bromage)
> >Subject: XPT tractive effort curves
> >Date: Mon, 19 Apr 1999 11:47:26 GMT

> >I've scanned an XPT tractive effort curve diagram from a 1984 Comeng sales
> >brochure. http://www.railpage.org.au/xpt/speed.jpg

> Just out of interest I took the figures from Davids diagram and fed then into 
> my Trainmaster XP power car model to see how well a single XP power car + 5 
> sitting cars would go between Melb & Albury.

> Surprisingly well actually , losing only 6 minutes over the existing schedule.
> Most if the lost time is on the grades between Broadmedows & Heathcote Jnc .
> 130 km/h on the flat is still acheivable with a longer than normal 
> acceleration time.

The lower curves on the diagram are the power required for balancing
speeds on certain gradients. A 2+5 set with one dead power car should
balance at 150km/h on level track.

Cheers
David