Chris M
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Post by Chris M on Feb 17, 2013 1:58:55 GMT
A friend was on the train that hit a person on the track between Derby and Loughborough yesterday. She describes being told that "the power was ripped out from under the train" and I can't figure out what that means? She isn't particularly into trains and other than it being a diesel I don't know anything about what stock was involved. I could understand the explanation being an interpretation for pickup shoes having been knocked off, but mainline trains in the East Midlands don't have any of them to start with.  This question has been approved by the forum staff, but in accordance with the forum rules please do not post any specifics regarding the incident. |
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Post by railtechnician on Feb 17, 2013 5:02:59 GMT
A friend was on the train that hit a person on the track between Derby and Loughborough yesterday. She describes being told that "the power was ripped out from under the train" and I can't figure out what that means? She isn't particularly into trains and other than it being a diesel I don't know anything about what stock was involved. I could understand the explanation being an interpretation for pickup shoes having been knocked off, but mainline trains in the East Midlands don't have any of them to start with. This question has been approved by the forum staff, but in accordance with the forum rules please do not post any specifics regarding the incident.The comment doesn't make sense for NR unless it refers to somehow destroying the traction supply earth return through the rails e.g. ripping out impedance bonds and/or connections. Not that likely I'd have thought without some major catastrophe. Of course on LUL the comment could be very descriptive as it is certainly not unknown for traction rails and snakes to be dragged by defective shoes and 'decked'. The last derailment I attended was exactly that, not only ripping traction rails off the pots but also lifting and dragging the depot track crossing made of sleepers all because a low shoe got trapped in the crossing 'vee' at a turnout. It's hard to imagine that a low shoe can cause a derailment and several hours work for ERU unless one has seen it! |
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Post by norbitonflyer on Feb 17, 2013 9:05:15 GMT
The comment doesn't make sense for NR unless it refers to somehow destroying the traction supply earth return through the rails e.g. ripping out impedance bonds and/or connections. There is no traction supply, overhead or live rail, on the line from Loughborough to Derby, and therefore no earth return either. Perhaps an underfloor diesel engine could become detached and fall under the train, if the train had such things - was it a Meridian (which has them) or an HST (which doesn't)? - but it seems unlikely that this could happen in the circumstances described. Another possibility is that the person was describing a sudden loss of momentum, as for example is experienced when a circuit trips on a Tube train. |
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Chris M
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Post by Chris M on Feb 17, 2013 11:36:21 GMT
Sorry, I don't even know what TOC operated the train (could have been XC or EMT I believe), let alone what type of train. The relevant quotes are
"The train has stopped in the middle of nowhere and not going anywhere. After sounding like a load of rubble under the train we've now been told there has been an INCIDENT. And we need a replacement driver!"
"If we could get there the next station is ours. But to do that we need power."
"We couldn't carry on the journey anyway as the power had been ripped out from under the train."
"But a train is less sturdy [than third rail] and [...] enough damage [was done] they had to send specialits from Birmingham before the train could move."
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Post by metrailway on Feb 17, 2013 13:00:46 GMT
Does sound like damage to underfloor equipment. It could be damage to an engine or maybe something else. Judging from the specialists from Birmingham comment, it was probably a XC train.
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Post by railtechnician on Feb 17, 2013 13:55:12 GMT
The comment doesn't make sense for NR unless it refers to somehow destroying the traction supply earth return through the rails e.g. ripping out impedance bonds and/or connections. There is no traction supply, overhead or live rail, on the line from Loughborough to Derby, and therefore no earth return either. Perhaps an underfloor diesel engine could become detached and fall under the train, if the train had such things - was it a Meridian (which has them) or an HST (which doesn't)? - but it seems unlikely that this could happen in the circumstances described. Another possibility is that the person was describing a sudden loss of momentum, as for example is experienced when a circuit trips on a Tube train. I had no idea whether the line was electrified or not or what locomotives run upon it! |
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Post by norbitonflyer on Feb 17, 2013 15:05:07 GMT
Sorry, I don't even know what TOC operated the train (could have been XC or EMT I believe), let alone what type of train. XC serves both Leicester and Derby, but according to their website do not run any direct services between them - the only trains normally serving Loughborough are operated by EMT. |
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rincew1nd
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Post by rincew1nd on Feb 19, 2013 19:36:00 GMT
EMT run Meridians which are similar to the Voyagers operated by XC, the latter being maintained at Central Rivers betwixt Birminghams and Derby.
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Ben
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Post by Ben on Feb 19, 2013 20:54:02 GMT
Over that section EMT run Class 222 DEMUs, HSTs and classes 153/6/8 DMUs.
Can only assume, though, that a refference was being made to some underfloor equipment. Speculatively, an alternator, inverter, or something that controls the motors.
Have to wait and see if it pops up in any news I guess.
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