OPRRMS Wrote:
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> SP5103 Wrote:
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> -----
>
> > Didn't SP's regular passenger units for name
> > trains have higher gearing for more than 65 mph?
> I
> > would imagine the Rio Grand division gave
> > passenger trains so room to run. I doubt they
> > needed that much dual service power for the
> heavy
> > express trains during the Christmas rush.
>
> Yup. The Train Masters were primarily used in
> freight service while they were on the Rio Grande
> and Tucson divisions.
>
> I'm not aware of any place on the SP (well, in the
> diesel age, at least) where tha Maximum Authorized
> Speed for passenger trains was higher than 79
> M.P.H. WAF or JWL, do you know of any places
> where it was higher? That being the case, units
> with so-called "passenger gearing" regardless of
> manufacturer had their overspeed set at a nominal
> 83 MPH, while dual-service freight/passenger units
> with "freight gearing" had their overspeed set at
> 72. This would come into play with the SDP45s,
> which were delivered with 62:15 "freight gearing"
> and it quickly became obvious that they couldn't
> maintain the passenger schedules because of it, so
> they were re-geared. Likewise, when F-units with
> (62:15 or lower) "freight gearing" were used on
> passenger trains, they restricted to train to the
> lower speed for those units. (Actually, it was a
> piece of cake to cut out the overspeed on units
> with 24-RL brake equipment - been there, done that
> - but it wasn't a particularly good idea.)

Nope. In the early days of the COSF (30s) along the Cal-P, it was 90 with ATC