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56 minutes ago, proton said:

Probably right, but double heading was found necessary on inclines to get traffic effort, rather than horsepower.

 

In the late 80's a single 90/87 would need two paths to get a full length freight liner over Shap or Beattock; with Class390 timings I would assume not dropping to much below the maximum speed for the train is even more important.

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14 hours ago, stovepipe said:

This photo has a caption about the 1500v supply at Longsight for the CLass 506s.

 

Transformer roarer

 

And just a lovely photo

 

Adding to the post informing us 83009 was used at Longsight as a voltage convertor ,  stepping down the 25kV AC to 1500V DC, note the 25kV warning sign across the cab door
 

 

 

 

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4 minutes ago, JeffP said:

De-wired...only in the UK.

Or the USA.

Or New Zealand.

It does happen; let's face it, overhead wires and overhead-loaded wagons don't work well together.  Diesel haulage is still a massive improvement on trucking the aggregate load any distance.

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1 hour ago, Northmoor said:

Or the USA.

Or New Zealand.

It does happen; let's face it, overhead wires and overhead-loaded wagons don't work well together.  Diesel haulage is still a massive improvement on trucking the aggregate load any distance.

 

Iirc Modern Railways reported recently that someone (F&F?) are developing/have developed a moveable ole system for yards, container terminals etc which can be shifted out of the way to allow overhead loading/unloading.

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2 hours ago, DY444 said:

 

Iirc Modern Railways reported recently that someone (F&F?) are developing/have developed a moveable ole system for yards, container terminals etc which can be shifted out of the way to allow overhead loading/unloading.

You dont need such a thing, just take an HV-fueled 66 at one end ... your freight / aggregrate tower in the middle terminating OLE at the entrance to the facility, with a DB90 or two primed and the mile or so back to the mainline under the knitting

 

Kat@johnsonstreetIEMD 

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53 minutes ago, DBC90024 said:

You dont need such a thing, just take an HV-fueled 66 at one end ... your freight / aggregrate tower in the middle terminating OLE at the entrance to the facility, with a DB90 or two primed and the mile or so back to the mainline under the knitting

 

Kat@johnsonstreetIEMD 

 

It's a point of view.  However the possibility of working terminal to terminal using plain old electric locomotives without having to faff about with loco changes, or adding/removing pilot locomotives, or having the expense and inevitable compromises of a bi-mode could change the economic dynamics of a number of long distance flows.  If nothing else it's another weight to place on the electrification side of the scales.

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