Hot Water Wrote:
-------------------------------------------------------
> HUTCH 7.62 Wrote:
> --------------------------------------------------
> -----
> > After all this F-125 talk, Got to wonder what
> the
> > top speed of a SDP-45 could be safely
> accomplished
> > above 79 mph. Hell Santa Fe's F's and PA easily
> > accomplished over 90 mph on the Cheifs, with
> way
> > less horsepower.
>
> It really isn't a matter of horse power, but the
> gearing in order to not overspeed the traction
> motor armatures. Add that to the stability of the
> SD 3-axle truck, the generally accepted "top
> speed", with the appropriate gear ration, would be
> about 90 MPH for the "old" SD truck.
>
> Now, on the Dash-2 series SD units, equipped with
> the "better" HT-C 3-axle truck, they should have
> been OK to about 105 MPH.

With that said...So was Alco's 3 axle truck common on the PA superior? To the old SD truck? Seems to be a few stories out there of over speeding the Super Cheif to make up for lost time.


Would of been cool to see a pair or SP SDP-45's hitting 105 mph hauling a string of passenger cars.