Re: [NSW] Power of V-set traction motors

["Tom" <gunzel3801@optusnet.com.au>]

Chris Downs <cvdowns@ozemail.com.au> wrote in message
SkzC6.2634$EQ3.83901@ozemail.com.au">news:SkzC6.2634$EQ3.83901@ozemail.com.au...
> V sets travelling on the down from Faulconbridge to Linden on the longish
1 in
> 33 rising grade tend to have there speed equalise (or very close to) on
this
> stretch.
>
> When pacing V-sets by car the equalising speeds seem to vary from a low of
> just under 60km/h to a high of about 75km/h.  From on board observation
sets
> with all chopper motor cars are usually the quicker and some camshaft sets
> (earlier cars?) are slower.  This suggests a lower kW/motor in earlier
cars
> and higher kW/motor in later cars.  Sometimes poorer performance could be
down
> to motors cut out but what I've observed seems too consistent for that.

So what are the difference betweem chopper motor sets and camshaft?