MK3 classifications

[alexl92]

I think this is typical rookie question so please accept my apologies but I noticed on an EMT HST in Leeds the other evening that coach G (I think) stated on the data panel that that coach was a MK3 TS-D. It looked like a pretty standard TSO to me, so please could someone explain to me what the 'D' bit stands for?

I know that in DMSL or DBSO for example, it would mean 'driving' or similar but this coach (clearly) doesn't have a cab!

 

[jopsuk]

I may be wrong, but possibly D(isabled)- it'll have wheelchair space and an accessible toilet.

 

[D6975]

I may be wrong, but possibly D(isabled)- it'll have wheelchair space and an accessible toilet.

Correct - Mk4s have one per rake as well.

(and also a first class one )

 

[TheEdge]

Technically, why is it TS-D rather than a TSOD? Our disabled carriage is a FOD rather than an F-D.

 

[scotraildriver]

Some units have more or less info on their classifications. Our 170's for example have a D-M-O-C-L-W Driving Motor Open Composite Lavatory Wheelchair. By contrast our 158 are sinply DMS Driving Motor standard. No reference to the open or wheelchair. Who knows why.

 

[455driver]

Technically, why is it TS-D rather than a TSOD? Our disabled carriage is a FOD rather than an F-D.

Because HST trailers dont have the 'O' on the classification, so its just TF, TS, TSD etc, and no I havent a clue why not either.

 

[6Gman]

Because HST trailers dont have the 'O' on the classification, so its just TF, TS, TSD etc, and no I havent a clue why not either.

Possibly because there were no compartmented HST trailers? So no need to distinguish SKs from SOs, or whatever?

 

[cjmillsnun]

Possibly because there were no compartmented HST trailers? So no need to distinguish SKs from SOs, or whatever?

IIRC the only compartmented Mk3s were the DBF on the class 442.

EDIT: There were some on the international rake as well, but I think they only ran in revenue service in Eire.

 

[61653 HTAFC]

IIRC the only compartmented Mk3s were the DBF on the class 442.

And the sleepers!

 

[Jonfun]

I always assumed it was a distinction between locomotive hauled and unit stock, in that Mk1/2/3a/4 hauled stock was classified as (for example) Tourist Standard Open, First Open etc - if TheEdge is referring to GA's hauled rakes, this would tally. Whereas vehicles which are part of multiple units such as HSTs drop the "tourist" and "open", gain either "motor" or "trailer" so simply become Trailer Standard, Trailer First etc.

 

[cjmillsnun]

And the sleepers!

Yeah but they were SLEPs and SLEs

 

[ge-gn]

On the subject of mk3 data panels, I noticed the other day when I travelled on to Norwich from London that the data panel on my coach said 110mph rather than 125mph. I thought all mk3 stock was 125 passed. Has there been modifications? I'm a new poster, so please excuse if this has been asked before...

 

[455driver]

Loco hauled mark3s have always been 110mph max.
They could probably be altered to run at 125mph quite easily if there was the need.

 

[cjmillsnun]

Loco hauled mark3s have always been 110mph max.
They could probably be altered to run at 125mph quite easily if there was the need.

They can, as LHCS has been converted to be used on HSTs.

 

[455driver]

They can, as LHCS has been converted to be used on HSTs.

Oh yeah, quite a few of them as well!

 

[ge-gn]

Loco hauled mark3s have always been 110mph max.
They could probably be altered to run at 125mph quite easily if there was the need.

What is different to the loco hauled stock compared to the HST stock?

 

[cjmillsnun]

What is different to the loco hauled stock compared to the HST stock?

Mainly down to loco restrictions.

 

[455driver]

Not much, its more a question of the braking, HSTs apply the brakes at both ends so the brakes apply much quicker.
I think the 90s and DVTs do the same but the 90s are max 110mph anyway so no point upping the max speed of the coaches.
Of course having them at 110mph max will also reduce maintenance costs compared to running them at 125mph.

 

[ge-gn]

Of course having them at 110mph max will also reduce maintenance costs compared to running them at 125mph.[/QUOTE]

Ah, now that makes sense.

 

[edwin_m]

What is different to the loco hauled stock compared to the HST stock?

The main differences in the actual coaches are that the loco-hauled have the standard electric train supply but the HST versions have a non-standard supply so can only get their power from HST power cars. Plus the HST ones don't have buffers. Neither of which affects the maximum speed.

 

[Ash Bridge]

IIRC the only compartmented Mk3s were the DBF on the class 442.

EDIT: There were some on the international rake as well, but I think they only ran in revenue service in Eire.

I can't remember the year, but actually saw it in service at Stockport on a Piccadilly - Euston service.

Just looked on Traintesting and it mentions they were put on a Euston - Manchester diagram sometime in the late 1980s, so it must have been around that period when I saw it.