eman577 wrote:Trains going up the Notch usually have 2 powered units as a precaution
since it takes so long for help to arrive if a unit dies. Therefor a control cab would
be of very little use.
Though, that is a bonus it’s not the reason for the two engines on the notch train. F units aren't really made for pulling a train in reverse. The engineer would have to either stick his head out the window or look in the side mirrors, neither one is safe or practical for a 2 hour trip from N. Conway to Crawford’s, visibility for the engineer is the reason why you have two engines on the notch train. When the 2820 was running, it powered the notch on its own, only to be accompanied by one of the sisters a few times; for reason unknown. The 573 also powered the Notch train by itself on at least one account that I know of, which took place in the summer of 2007.
eman577 wrote:Running 2 units on the valley train presents length problems. In order to clear 6 cars, the power would
have to pull out onto the crossing with the lead unit and stop to uncouple. This means that the train
would have to stop once at the edge of the crossing and wait 20 seconds after the crossing protection
activated, then pull ahead and stop again to uncouple. Also would take extra time for the engineer to
swap ends at Conway, that the schedule does not allow for.
The original plan for the 4268 was to be used as a cab unit for south bound trains while the operating engine would push on the other end; just like the Downeaster. Two obstacles in the way which ultimately killed the idea: 1) 4268 would have needed weights installed in it so it wouldn't ride so high. 2) All the cars would have needed to be equipped with all the gadgets so the engineer could control the running engine at the opposite end. The idea was to eliminate the engine switching ends at Conway which would have made the ride about 10 to 15 minutes shorter. This all was in the planning stages in the early to mid 80's long before Bartlett and Notch train service even started.
It takes real skill to choke on air, fall up the stairs and trip over nothing. I have those skills.