377-v-378

[Harlesden]

Aside from the interior and the 378's walk through layout, Classes 377 and 378 appear virtually identical. Just wondering why the 377's have a maximum speed of 100mph while the 378's only have a maximum speed of 75 mph.
Obviously the 378's will never be driven at 75mph in their current location, but who is to say they will not eventually go elsewhere?

 

[150222]

Aside from the interior and the 378's walk through layout, Classes 377 and 378 appear virtually identical. Just wondering why the 377's have a maximum speed of 100mph while the 378's only have a maximum speed of 75 mph.
Obviously the 378's will never be driven at 75mph in their current location, but who is to say they will not eventually go elsewhere?

It's the same with LOROL's class 172's. Top speed of 75 yet Chiltern/LM examples can do 100.

 

[Nym]

Don't the 378s have a LU style seating layout? meaning equipment that isn't underfloor is moved to the sides rather than under seats?

 

[SouthEastern-465]

Aside from the interior and the 378's walk through layout, Classes 377 and 378 appear virtually identical. Just wondering why the 377's have a maximum speed of 100mph while the 378's only have a maximum speed of 75 mph.
Obviously the 378's will never be driven at 75mph in their current location, but who is to say they will not eventually go elsewhere?

To be honest both are designed for totally different jobs so can hardly compete against each other. A Class 378 is designed for short suburban stopping services in the urban parts of London, whilst 377s are all round units used on stopping and fast services.

 

[150222]

Class 376's also have a top speed of 75.

 

[SouthEastern-465]

Class 376's also have a top speed of 75.

I think (might be wrong) they're limited to 75mph but capable of 100mph. I know this is the case with Class 357s they're capable of 100mph but are limited to 75mph.

 

[150222]

I think (might be wrong) they're limited to 75mph but capable of 100mph. I know this is the case with Class 357s they're capable of 100mph but are limited to 75mph.

So is this not the case with LO's 172/378 fleet?

 

[SouthEastern-465]

So is this not the case with LO's 172/378 fleet?

I'm not to sure about the 172s as I'm not much of an expert with DMUs! I'd assume 378s wouldn't need to be capable of 100mph though. Although as I said 357s are capable of 100mph but are limited to 75mph, this may be the case the 378s I'm not to sure!

 

[O L Leigh]

I know this is the case with Class 357s they're capable of 100mph but are limited to 75mph.

Not so. Cl357s are 100mph units but the maximum linespeed on the c2c network is just 75mph.

Cl376s and Cl378s probably could go as fast as 100mph but they are limited to 75mph. For one thing, neither units have yaw dampers fitted to their bogies. This is the same thing that kept the Cl320s down to 75mph prior to modification.

O L Leigh

 

[SouthEastern-465]

Not so. Cl357s are 100mph units but the maximum linespeed on the c2c network is just 75mph.

Cl376s and Cl378s probably could go as fast as 100mph but they are limited to 75mph. For one thing, neither units have yaw dampers fitted to their bogies. This is the same thing that kept the Cl320s down to 75mph prior to modification.

O L Leigh

Ah ok thanks for that O L leigh! Will remember that for the future!

 

[ng1980]

To be honest both are designed for totally different jobs so can hardly compete against each other. A Class 378 is designed for short suburban stopping services in the urban parts of London, whilst 377s are all round units used on stopping and fast services.

I agree. I find it difficult to imagine that they would be popular or suitable (with a longitudal seat configuration) on routes with a line speed of more than 100mph.

If they were dispersed in the future, I imagine they would be dispersed short to branch or commuter lines with a low line speed.

 

[150222]

I agree. I find it difficult to imagine that they would be popular or suitable (with a longitudal seat configuration) on routes with a line speed of more than 100mph.

If they were dispersed in the future, I imagine they would be dispersed short to branch or commuter lines with a low line speed.

They may be fitted with standard layout seats after the olympics!

 

[MidnightFlyer]

They are being fitted with standard layout seats after the olympics!

Are they?

 

[ng1980]

They are being fitted with standard layout seats after the olympics!

Oh! I'm surpirsed! I can see the benefits of longitudal seating on the London Overground network (although I prefer conventional seating).

 

[ushawk]

They are being fitted with standard layout seats after the olympics!

First ive heard of that, not sure about it though - i thought they were fitted with longitudinal seating so they can get more people on during the peaks ?

 

[ainsworth74]

They are being fitted with standard layout seats after the olympics!

Source?

 

[Nym]

So the're going to move all the equipment housed under the seats round then?

 

[150222]

Source?

I read it on this forum.

 

[Nym]

You read a lot of things on this forum...

If I posted something saying that Siemens planned to team up woth CSRE to provide brand new versions of Class 156 units for pacer replacement after buying the old plans off Bombardier would you beleive that?

 

[OxtedL]

I don't suppose you can remember where on the forum?

 

[MidnightFlyer]

I've searched quite a few things in the past few minutes and can't find anything...

 

[150222]

I don't suppose you can remember where on the forum?

No sorry.

 

[OxtedL]

No sorry.

I doubt it had any basis anyway. There would be no point in re-configuring the 378s. Let's ignore it and move on.

(I love how half the posts in this thread are now on this claim... :roll

 

[swt_passenger]

They may be fitted with standard layout seats after the olympics!

The idiot who first floated that idea (Boris Johnson IIRC) obviously didn't realise that most of the equipment normally found in the cabinets at the ends of Electrostar carriages has been repositioned under the longitudinal seating, to allow for the wider open gangways.

So I bet it never happens...

 

[ng1980]

The idiot ... (Boris Johnson IIRC)

Do sane people listen to that idiot?

Some people are best ignored!

 

[causton]

The idiot who first floated that idea (Boris Johnson IIRC) o

He posted on the forum?

 

[swt_passenger]

He posted on the forum?

Of course. But he probably has a totally different screen name...

 

[Pumbaa]

Aside from the interior and the 378's walk through layout, Classes 377 and 378 appear virtually identical. Just wondering why the 377's have a maximum speed of 100mph while the 378's only have a maximum speed of 75 mph.
Obviously the 378's will never be driven at 75mph in their current location, but who is to say they will not eventually go elsewhere?

378s are about half as powerful as the 377s, and 379s are only marginally more powerful than 378s. They use a different electrical standard through the train to the earlier Electrostars, the same as 379s. As a result the pins are the wrong way round or something nonsensical.

The door mechanisms are different, camera software, arrangement of brake cables, interior electronics are all different from earlier Electrostars, but essentially variation on a theme.

A lot of what was used for 378s was beefed up for 379s. I suspect the new order for Southern will see only the bodyshells taken from 379s because that is the available presses. The rest of it will still be in line with the existing 377s.

 

[notadriver]

378s are about half as powerful as the 377s, and 379s are only marginally more powerful than 378s.

How do you know 378s are half as powerful as 377s?

 

[Pumbaa]

From the spec lists. O L Leigh also worked it out last year. It is not exactly half as powerful but it is around that mark. 485Kw to around 850Kw?
--- old post above --- --- new post below ---
Edit: 3 car 377 is 1000 kW. 4 car is 1500 kW.