The Anonymous Widower

Bi-Mode Good, Tri-Mode Better

The title of this post, is the same as that of this article on Rail Engineer.

It is an informative article about the creation of the Class 769 trains.

These are some points.

Class 150 Performance

Class 769 performance on diesel is likely to be as good as that of a Class 150 train, if not better.

When running on electric power, they will still be capable of 100 mph.

Extensive Route And Performance Modelling

Extensive computer modelling has been carried out to make sure the train performs.

Access To The Original Designers

It appears that they were able to call in some of the original designers and that at least some of the iriginal drawings were available.

An Extensive Project

The article quotes these figures on the resources used to design the conversion.

  • 60 engineers
  • 45,000 engineering hours
  • 2,500 drawings
  • 3,500 detailed components

I suspect that this could account for the late running of the project.

Approvals

There is a large section on approvals, which is well worth a read. It looks to me, that they are making sure, that these trains fit all regulations and not those that apply to upgrades and improvements.

Noise

They are also going for better noise than a Class 15x train, which must be a good thing.

Raiding The Class 150 Parts Bin

They obviously needed exhausts for the two diesel engines, so in true Colin Chapman fashion, they looked round for something that was readily available and would do the job.

As Class 319 and 150 trains share a lot of components like bogies, the exhausts for the converted trains are from a Class 150 train.

Maintenance Costs

The new trains will obviously cost more to maintain than a Class 319 train, but will probably be cheaper to run than a Class 150 train.

The Ultimate Class 769 train.

The article indicates what could be possible.

  • Air cooling
  • CCTV – both saloon and forward facing
  • At seat USB and power sockets
  • Ethernet backbone to support engine control and Wi-Fi
  • Interior and exterior rebranding
  • Guard’s door control panels.

Not a bad specification for a thirty-year-old train.

Orders

There may be more orders in the pipeline.

Conclusion

I think that these trains will do what they are intended to do in a reliable and quality manner.

Tailpiece – Class 455 Flex

The article finishes with a disclosure about what might happen to the Class 455 trains.

These have been extensively refurbished and have been retrofitted with three-phase AC traction systems incorporating regenerative braking. There would be space on the intermediate trailer coach for batteries that could be charged by the regenerated energy and by the diesel engines. Such a feature could have several benefits such as being able to stop the diesel engines in terminal stations and to supplement diesel engine power when accelerating.

Could this be a four-car efficient runabout for branch lines, as they are only 75 mph trains?

 

 

 

September 28, 2018 - Posted by | Travel | , , , ,

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