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My Idea For a New BMMU/EMU/DMU Platform

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Doomotron

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I've travelled on quite a multiple units over the years and I've been coming up with an idea for a new multiple unit platform that is very flexible for the people who buy the trains. For example:
  • Electrostars can be great for all lengths of journeys but suffer from a low top speed and very 'playful' suspension.
  • Diesel Desiros are very nice inside, but suffer from massive overcrowding and high fuel consumption.
  • Voyagers are good trains with a nice top speed when maintained well, but the tilting ones suffer from a cramped interior and in some locations very shaky, like all DMUs with underfloor engines.
As you can see, when buying an MU, you have to have certain pros and cons. I've tried to make my train design as good as it can be while suiting for every need.

PART ONE - DESIGN
The train family, that I haven't named yet - please suggest some names if you want, is externally identical to the Class 332. An old design, yes, but I have modified it slightly.

The bogies are a new, lighter design but still with an outside frame to allow modifications like adding a tripcock to be easy. The BMMU and EMU are 4 coaches minimum with FLIRT-style diesel coach (which people can walk through) in between the 2nd and 3rd coach. On the DMU version, the train has a minimum length of 2 passenger coaches. On the BMMU and EMU versions, the position and amount of pantographs will differ.

On a 4-coach EMU, the pantograph will be on the inside end of coach 3. This is the same on the BMMU. On the DMU, there will be no pantograph but there will be a recess for it to go in the usual place, as well as all the space for electrical equipment. This is so that an operator can quickly make their DMU into an EMU by adding the required electrical equipment and removing the diesel engine coach. Third rail shoes can be added. The diesel engine coach will be like the FLIRT design. The carriages will have bogies between the coaches - an articulated design.

The trains can both have walkthrough gangways at the end of the trains or normal, flat ends. This is chosen by the buyer.

Exterior colour scheme by default would be grey with a red skirt and doors. The roof can either be the body colour (like on the Class 375s) or grey (useful on darker liveries to lower chances of air conditioning failing). The front of the train can be both yellow or a different colour - by default it would be matte black.

PART TWO - ENGINES AND STUFF
Currently I have not figured out a power system. However, I do know what I'd like them to sound like

For electric, I'd quite like it to sound like a Class 385, maybe with a hint of Class 373.
For diesel, I'd like it to sound meaty and intimidating - like a Valenta or a 170 or a Bugatti Chiron.

PART THREE - INTERIOR
While the operator will have a large say in the interior, they can choose from one of my 'presets', if you'd call it that.

  • Inner Metro: Quantum L100 Triple seats with lino flooring.
  • Outer Metro/Inner Suburban: Same as Inner Metro but instead has Quantum L100 Double seats.
  • Outer Suburban: Quantum M101 seats with carpet and lino at the doors.
  • Express/Long Distance: Quantum M104 seats with headrest upgrade and extra cushioning. Same flooring as the Outer Suburban version.
Doors would be fast opening. Default interior colour scheme would be red and dark red patterned seats with black leather headrest 'areas' and armrest covers with black and grey carpet/lino and the inverse (grey/black) at the doors.

PIS displays will be on the front and can either be in the centre of the coaches (window 3 between the doors) or on windows 1 and 5 between the doors.

CONCLUSION
I hope you like this concept. If anybody has any name suggestions for it, please feel free to tell me. I was thinking of 'Revenge' but telling a passenger they're getting on the Revenge train probably won't work very well.

Also nobody suggest Doomostar.
 
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swt_passenger

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Your point about third rail shoes is unnecessary. There is no correlation between shoe position and powered bogies. All the shoes, however many, feed a DC bus line through the unit. They are positioned where necessary to avoid gapping, and in enough numbers to carry the designed current.

All Voyagers have the same body, whether they tilt or not.

What does BMMU stand for?
 

Doomotron

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Your point about third rail shoes is unnecessary. There is no correlation between shoe position and powered bogies. All the shoes, however many, feed a DC bus line through the unit. They are positioned where necessary to avoid gapping, and in enough numbers to carry the designed current.
I know. The point of having them on every bogie, though, is to stop the air con and other things not working when there is no third rail. Also another reason is that if one third rail shoe on a coach stops working properly, the coach won't be affected as much as a normal Electrostar or Javelin. And also, only one third rail shoe on the coach would always be on. The other can either charge a small battery if fitted or can operate passenger things with the other one only operating the traction motors.
What does BMMU stand for?
It stands for Bi-Mode Multiple Unit. While EDMU might be more official, it is frighteningly similar to DEMU, which is very different, so I say BMMU.
All Voyagers have the same body, whether they tilt or not.
I know, but most of the complaints are from the tilting ones and not the Meridians.
 

swt_passenger

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Your electrical system is just far too complex then. The DC bus line already solves all your problems. You accept presumably that you wouldn’t have a pantograph above every bogie, just because all bogies are motored? Then you really don’t need all bogies to have shoes either.
 

Bedpan

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And that means that as long as just one shoe in the entire train is in contact with the live rail, the entire train will have a full power supply.
 

Doomotron

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You accept presumably that you wouldn’t have a pantograph above every bogie, just because all bogies are motored?
No, because there are always going to be gaps between the third rail but on OH, the only gaps are the neutral sections, which I can't do anything about.
 

Clip

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No, because there are always going to be gaps between the third rail but on OH, the only gaps are the neutral sections, which I can't do anything about.

More shoes = more shoes to get knocked off.

There really is no need for each bogie to have one
 

Clip

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Oops also if you are worried about gaps then you would need 2 per bogie - 1 for each side because the power rail swaps side very often
 

Doomotron

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Oops also if you are worried about gaps then you would need 2 per bogie - 1 for each side because the power rail swaps side very often
I know. When I say two shoes per coach I mean on each side.
 

Andy25

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If you leave a pantograph we'll on your DMU you also need to leave space for a main transformer and traction case. You also need to have space for jumpers between cars and in the carcass to load share etc.

And "IGBT motor" makes no sense. IGBT is a type of switch used in the traction electronics it has no influence on the type of motor used. Modern traction motors are often permanent magnet motors.

Also the Hitachi motors are ****, the Class 395 javelin ones may even be replaced as they are considered not worth overhauling.
 

big all

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traditionally 4shoes per unit sometimes in pairs the are like that as a compromise
yes somtimes you get gaps somtimes you can bridge between substations excessivley
you also have to remember if you have to "paddle up" to isolate the unit from the third rail you need a paddle per shoe plus a couple off spares
now forgive me iff paddeling up is easier now or not needed because off self raising shoes as my 3rd rail time was 25 years ago lol
 

Doomotron

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I have taken all of your comments into consideration and made some edits to the design.
 
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