Locomotive power (was: Re: WCR, where are the facts????)
David Bromage (dbromage@metz.une.edu.au)
8 May 1997 10:46:04 GMT
David Johnson (trainman@ozemail.com.au) wrote:
>Maurie Daly wrote:
>
>> This leads to various differant HP ratings that can be delivered to the
>> traction motor sets at differant speeds and for differing times.
>> Ideally it would be nice to be able to increase the number of traction motors
>> from the usual 6 to 8 as engine HP increases,but loading and curve radii
>> prevent this.
>
>A couple of observations I'd like to share. We ran a 105 wagon coal train from
>Kooragang Island to Ulan and return. On the return, we did a test lift on
>Whittingham Bank with three 90 class locos and 11670 tonnes hanging off the
>back. At 0.5 km/h, the locomotives were exerting about 300 horsepower at 1900
>Amps. At 2 km/h, the locomotives were exerting about 900 horsepower at 1800
>Amps. At 25 km/h, the locomotives were exerting about 3830 horsepower at 900
>Amps.
Do you happen to know what the tractive effort at the same speeds was?
Cheers
David