by p42thedowneaster
Perhaps what he means......Even if the brakes were accidentally released in the cab, it might never have moved if the train was then dumped and re-secured after the fire?
Railroad Forums
Moderator: MEC407
Gilbert B Norman wrote:What if MM&AC was properly insured. What if the insurer or their broker simply said this is the level you must have, in view of the volume of HAZMAT you are now handling, or we will not be party to writing you.From my experience with trying to obtain increased limits for Railroad Liability insurance, the insurer may have simply said "this is the maximum level you can have, in view of the volume of HAZMAT you are now handling, or we will not be party to writing you." Various other insurers, like at Lloyd's of London, might offer more coverage, but at a high price.
KEN PATRICK wrote: isn't this the same as doing an emergency application? aren't all brakes held against the wheels by the air in the brake cyclinders when the emergency portion of the brake valve is activated? also makes the application of manual brakes easier. so dump the air and crank on some mechanicals . fail-safe & quick.Opening an angle cock will cause an emergency application, also called "dumping the air". It is true that the air in the brake cylinders holds the shoes against the wheels but ONLY until the air in the car's reservoir is depleted to the point that an equilibrium is reached. The loss of air in the reservoir is typically caused by leakage around gaskets, fittings etc. This leakage occurs regardless of whether the brakes are in "full set" or "emergency". Thus, had these cars been dumped, they still could have released and rolled away. While it may be "quick", it is most definitely NOT "fail-safe".
In addition to the 1 hand brake, the 13 cars were being secured by an emergency application of the train brake. However, over the next 31 hours, the air in the cars' brake cylinders bled off, reducing the effective braking force of those cars. When the braking force from the train brakes was sufficiently reduced, the retarding force of the 1 applied hand brake could not resist the gravitational force of the 13 loaded coal cars. The cut of cars then began to roll uncontrolled northward down the 1% grade.The full report can be read here:
KEN PATRICK wrote:carroll; contractor/subcontractor cp & mm&a. third party and fob origin is the web that will draw cp into the clean-up and deaths. cp was responsible for mm&a actions. there's a few items to be checked but i'm guessing irving paid the third party who, in turn paid for the oil and cp.cp paid mm&a thereby establishing a liability link. this is why i opined that cp should quickly effect the clean-up. miminize the lost business exposure. sadly, this could have been avoided by opening an angle cock. ken patrickKen it doesn't matter who paid who for what. CP isn't on the hook for what happened on the MMAC that night. That liability link is bogus. It doesn't work as has been proven time and time again in the railroad world when 2nd, 3rd and more parties involved in derailments that were doing the same thing as MMAC was are the only ones that are held responsible. They and they alone pay-up. Pan Am paid for the clean up and transferring of product in the derailment along the Penobscot river back in I believe it was March, not BNSF the originating RR.