Free Republic
Browse · Search
News/Activism
Topics · Post Article

To: ZGuy

Does anybody know the location of the “dead man” switch/button on these trains? If he collapsed, could he have fallen on that switch, keeping it engaged and preventing the train from coming to an automatic halt?


6 posted on 09/17/2008 9:52:04 AM PDT by ZGuy
[ Post Reply | Private Reply | To 1 | View Replies ]


To: balk; editor-surveyor

Can you shed any light on #6?


9 posted on 09/17/2008 9:55:29 AM PDT by ZGuy
[ Post Reply | Private Reply | To 6 | View Replies ]

To: ZGuy

Don’t know for sure about the newer engines, but on older engines, it is a pedal that requires measurable force to depress. I believe that some of the european engines use a hand grip with a similar provision.

I doubt that the deadman switch played into this. It’s more likely that he was just not paying attention, and that the curve of the track kept the trains out of each other’s view until it was beyond the point of prevention. Trains take a long time to slow.


14 posted on 09/17/2008 10:34:46 AM PDT by editor-surveyor ( If Obama had Palin's resume and experience Obama would be qualified to be VP too.)
[ Post Reply | Private Reply | To 6 | View Replies ]

To: ZGuy
The dead man switch is a foot pedal.

DEADMAN FOOT VALVE: A device, which will initiate a penalty brake application on a locomotive after a short time delay, if foot pedal is released on locomotive and brake cylinder pressure is not at least 25 psi.

40 posted on 09/17/2008 8:18:49 PM PDT by balk (thefightnetwork.com)
[ Post Reply | Private Reply | To 6 | View Replies ]

To: ZGuy
Interestingly, most of the talk I've seen is how the lead passenger car sustained so much damage, regardless of the engineer's error. Could anti-climbers on the couplers have prevented the lead locomotive from rising above the frame and smashing through the soft sheet metal?

It appears that the frame of the lead passenger car did not absorb any impact. Anti-climbers are used on all tanker cars after the wreck in Mississauga in the 80's, when propane cars climbed each other and exploded. The anti-climber extends the vertical reach of the coupler knuckle by about a foot each way. If a car leaves the rail, travelling lower or higher, the coupler remains engaged. My grandfather was on the board that implemented this device.

41 posted on 09/17/2008 8:27:34 PM PDT by balk (thefightnetwork.com)
[ Post Reply | Private Reply | To 6 | View Replies ]

Free Republic
Browse · Search
News/Activism
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson