Re: HST vs. EMU
Posted: 01 Jan 2000 00:00
Stephen Down <ste...@sjd117.freeserve.co.uk> wrote in message
news:84ljkm$lol$1@newsg2.svr.pol.co.uk...
- Semi-permanently coupled sets
- Ability to work in multiple
- (Possibly) containing powered coaches
An HST (IC125) would fail the second of these - though there is distributed
power, the 'units' are not designed to work in multiple, except in
emergency. This means they are essentially top-and-tailed locomotive-hauled
sets with the locomotives capable of multiple working in pairs (one at each
end). The same could, I suppose, be applied to a GatEx EMU, however these
have powered coaches, so don't count as hauled stock.
An E* is a semi-permanent coupled set (or more precisely two sets coupled
together), has some of its power equipment for each 'loco' in the end
passenger coach and is propelled by both 'locos' at once. I believe that if
sufficient power and platform capacity was to be available, multiple working
of sets would be possible. Therefore, it is in my book an EMU.
Neil
news:84ljkm$lol$1@newsg2.svr.pol.co.uk...
I think the main criteria for something being an MU would be...uk.railway added
Maarten Batenburg wrote:
Why is a TGV (or a similar HST, like the Eurostar) not a EMU? It exist
of several semi-permanent coupled carriages, of which some are
powered.
I'm getting confused now.
I would have thought that a TGV or Eurostar would be considered
"loco-hauled" because it is only the leading unit that powers the entire
train. But it can't be "loco-hauled" and an EMU, can it?
- Semi-permanently coupled sets
- Ability to work in multiple
- (Possibly) containing powered coaches
An HST (IC125) would fail the second of these - though there is distributed
power, the 'units' are not designed to work in multiple, except in
emergency. This means they are essentially top-and-tailed locomotive-hauled
sets with the locomotives capable of multiple working in pairs (one at each
end). The same could, I suppose, be applied to a GatEx EMU, however these
have powered coaches, so don't count as hauled stock.
An E* is a semi-permanent coupled set (or more precisely two sets coupled
together), has some of its power equipment for each 'loco' in the end
passenger coach and is propelled by both 'locos' at once. I believe that if
sufficient power and platform capacity was to be available, multiple working
of sets would be possible. Therefore, it is in my book an EMU.
Neil