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Old 23rd May 2017, 22:20   #586
TimboM
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When the 88 (88002 I think) was on the Settle & Carlisle at the weekend it was leading with the 68 tucked in behind.

In this configuration away from the wires, was the 88 just controlling the 68 and the 68 was providing the power?

Or was the 88's diesel engine contributing too? (or doing all the work - but I doubt this option as was a pretty long rake + the 68 and seemed to be going at a fair pace for a 950hp engine).

Thanks in advance for any info.
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Old 24th May 2017, 05:21   #587
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Probably best to ask the driver, several of them post on Facebook with pictures and details. They do say that following the tests the 88s alone would struggle to keep to time with a heavy load on diesel with those gradients. Both types have full control from the other when coupled. They are also capable of operating by remote control if the relevant controllers are fitted to both. A 68 was used in the initial remote control tests at Albuixech with a Euro 4000 but only one way as the 68's don't have the necessary equipment fitted to control the brakes. The 88 alone cannot supply train services and full power to the wheels at the same time, something has to give. Additional trailing load results on a reduction of attainable maximum speed.
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Old 24th May 2017, 07:10   #588
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i just wondered why they never made a co-co version of the 68/88, unless that's in the pipeline
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Old 24th May 2017, 08:32   #589
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Quote:
Originally Posted by HellaEllie View Post
i just wondered why they never made a co-co version of the 68/88, unless that's in the pipeline
http://www.stadlerrail.com/en/products/euro-dual/

Not that this is a UK spec ....
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Old 24th May 2017, 09:11   #590
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i just wondered why they never made a co-co version of the 68/88, unless that's in the pipeline
I have been banging on about that since the 88 was first announced.

An extra axle or two would have enabled a larger diesel engine to have been fitted making the loco truly dual purpose.

Perhaps the next design will do that.
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Old 24th May 2017, 18:57   #591
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I have been banging on about that since the 88 was first announced.



An extra axle or two would have enabled a larger diesel engine to have been fitted making the loco truly dual purpose.



Perhaps the next design will do that.
I'd up the rating on 25kV too so that you had a comparable performance to a 92.
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Old Yesterday, 08:45   #592
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I have been banging on about that since the 88 was first announced.

An extra axle or two would have enabled a larger diesel engine to have been fitted making the loco truly dual purpose.

Perhaps the next design will do that.
Also i coulda seen it as an ideal replacement for the 60's or 56's on the heavy freights too (for a diesel freight / coco version of 68)
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Old Yesterday, 09:35   #593
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Also i coulda seen it as an ideal replacement for the 60's or 56's on the heavy freights too (for a diesel freight / coco version of 68)
Why do we need a replacement for the Class 60 when there have been dozens of them parked up for years at Toton?
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Old Yesterday, 11:32   #594
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Quote:
Originally Posted by HellaEllie View Post
i just wondered why they never made a co-co version of the 68/88, unless that's in the pipeline
DRS is not in the business of hauling very heavy trains. Why would it need a six axle locomotive with all the extra cost?

In any event variable voltage, variable frequency ac traction motors as used in all modern traction are inherently slip resistant - unlike series wound dc machines. For DRS' business six axles would be overkill.
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Old Yesterday, 16:40   #595
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Quote:
Originally Posted by TimboM View Post
When the 88 (88002 I think) was on the Settle & Carlisle at the weekend it was leading with the 68 tucked in behind.

In this configuration away from the wires, was the 88 just controlling the 68 and the 68 was providing the power?

Or was the 88's diesel engine contributing too? (or doing all the work - but I doubt this option as was a pretty long rake + the 68 and seemed to be going at a fair pace for a 950hp engine).

Thanks in advance for any info.
From the videos it sounded to me like both were under power
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Old Yesterday, 17:31   #596
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Originally Posted by CosherB View Post
Why do we need a replacement for the Class 60 when there have been dozens of them parked up for years at Toton?
...not to mention most of the 92 fleet (at Crewe Electric) and even relatively new 70s. Strongly suggests there isn't a need for heavy freight locos these days.

But there is demand for versatile, mixed-traffic, efficient locos like the 68s and 88s - which is why DRS have gone for them. If they have the occasional heavy freight they've got enough traction now to double-head.


P.S. Thanks to those who've provided responses to my Q above.

Last edited by TimboM; Yesterday at 18:27.
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Old Yesterday, 18:33   #597
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I'm sure that it's been stated on here before that DRS initially wanted a co-co locomotive but were persuaded away by the manufacturer as technology had moved forward and the bo-bo version would be more than adequate for their needs.
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