From: "Rainer Auer" <auerr@...>
Relating to this batch of SD40s, all were upgraded to -2 electricals and had
Q-Tron installed. Not knowing anything about the mechanical/electrical
workings of locomotives, I ask this dumb question. Since the Q-Tron device
improved the c.t.e. to 82,500 lbs. from 70,000 lbs., are the units to be
sold with the device installed or is it readily uninstalled for use on other
SD40-2s?
One point of interest, Rainer. Q-Tron is an electronics company, based
in Calgary, I believe, not the name of a device. Q-tron builds numerous
electronic devices used on CPR, including about 90% of the speedometers
used on the SD-40s when the original mechanical analogue speedos were
replaced, and the Speed Control which controls the speed of the
locomotive when the train is loading with coal.
The feature you refer to which increased the hauling capacity of the
locomotive was known as the PTC or Positive Traction Control. This
device replaced some of the Electronic modules used in the -2s and, from
what I understand, monitored the amperage going to each traction motor
and when the electricity was cut back to a particular traction motor to
stop the slipping, the extra electricity was transferred to a motor that
was not slipping.
Also while the previous SD40-2s, Bill noted as being sold, were units
"stored unserviceable", these twelve were "stored serviceable", is the
selection of units for sale based on age? I know the CPR is sensitive to the
age of the fleet, its good PR when selling your service.
Rainer
----- Original Message -----
From: Bill Miller <bmiller@...>
To: <C-P-R@...>
Sent: May 16, 1999 5:31 PM
Subject: [C-P-R] SD40's to Dakota Minnesota & Eastern
From: Bill Miller <bmiller@...>
The following units are being readied for sale to Dakota Minnesota &
Eastern:
CP 5501, 5513, 5517, 5520, 5537, 5545, 5549, 5554, 5557, 5561, 5562, 5563
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