Ericmopar wrote:I've never understood this logic since the wreck happend.
Train brakes apply when line pressure is lost. As the line pressure got lower, the cylinders should have applied more brake.
Even if the engines were left running, the brake cylinders would have bled down from leaky seals.
Someone would have had to apply the engine brakes, then release and recharge the train brakes, then reapply the train brake, once the system is recharged.
Leaving the engines running wouldn't have held the brakes on their own.
The engineer (I don't believe there was a "Crew") walked off without setting enough hand brakes, period.
The fire crew did exactly what the railroad taught them to do, and if the trainman had set enough handbrakes, the thing wouldn't have rolled away.
End of Story.
Yes, as the brake pipe drops the triple valve on the car sends air from the air tank to the brake cylinder at 2.5 times the amount of the brake pipe drop, brakes apply. The brake pipe continues to drop and the triple valve continues to exhaust the air tanks on each cars until you have equalization at about 60 lbs of pressure. At that point now the engine is not running to maintain the system, everything continues to bleed off. At some point during the night everything bled off to the point there was not enough pressure in the brake cylinders to hold the train and down the hill it went. If you read my first post I agree, the engineer or crew did not apply any hand brakes. I do not know what first responders are taught or not taught, but I would hope if they are taught to shut the locomotive or locomotives down, that hopefully they are also taught to make sure the train is secure for safety? It was the crews responsibility, but people make mistakes for a host of reasons, one of them being fatigue. It never hurts to "double check".



He has already made a statement that he will not get involved. I will try to find the blurb.