Loading Gauge for HS2

[Relativenewbie]

Has there yet any announcement regarding the northwards High Speed Rail's Loading Gauge? It would seem to make sense to go for the continental standard in order to accomadate larger (perhaps double decker?) trains similar to the TGV Duplex. And what is the loading gauge currently used for High Speed 1?

 

[MCR247]

European loading gauge is used for HS1, but if the HS2 trains will use classic lines, then TGV duplex style trains won't be possible

 

[ainsworth74]

My understanding is that HS2 will be built to the European loading gauge but there will be two types of trains, a classic compatible and a HS2 only. With HS2 only being built to take advantage of the larger loading gauge whilst the classic compatible will fit the current loading gauge. Where is that yestohs2 guy he will know...

 

[Relativenewbie]

Interesting, cheers for your quick responses. Just another quick question; do you know what sort of speed these 'HS2 only' trains will run at in commercial service. It would be disappointing if it weren't anything higher than the 225/140 used by domestic services on HS1

 

[jopsuk]

I'm surre I've seen official mention of both HS1 and HS2 being specified as TSI Rolling Stock (2002/735/EC) GC. There is no "The European loading gauge", a wide range exists throughout Europe. This page shows comparisons

 

[YesToHS2]

Any dedicated HS2 units will be built to a GC "European" loading gauge with the classic compatible units built to a W10 loading gauge.

 

[j0hn0]

But will be unable to tilt and so will give slower speeds north of HS2 than pendos.

Surely by the time this is built, alstom or siemens can come up with a high speed tilting bogie?

APT wasn't far off achieving this, anyone know why tilting trains do not go faster than 140mph?

 

[sprinterguy]

Interesting, cheers for your quick responses. Just another quick question; do you know what sort of speed these 'HS2 only' trains will run at in commercial service. It would be disappointing if it weren't anything higher than the 225/140 used by domestic services on HS1

The alignment of HS2 is being designed for 400kmh/250mph running. AFAIK, the fastest currently available production train is the 360kmh/224mph capable Alstom AGV.

 

[gordonthemoron]

APT wasn't far off achieving this, anyone know why tilting trains do not go faster than 140mph?

no, but ICETs only reach their top speed on straight hi-speed lines, on curved tracks they go really slow (60mph or so)

 

[Kingfisher200262]

The alignment of HS2 is being designed for 400kmh/250mph running. AFAIK, the fastest currently available production train is the 360kmh/224mph capable Alstom AGV.

CSR's CRH380a operates at a commercial maximum speed of 380 km/hr and has been tested up to 416 km/hr.

 

[sprinterguy]

CSR's CRH380a operates at a commercial maximum speed of 380 km/hr and has been tested up to 416 km/hr.

I knew that there'd be something that I'd missed

 

[WatcherZero]

But will be unable to tilt and so will give slower speeds north of HS2 than pendos.

Surely by the time this is built, alstom or siemens can come up with a high speed tilting bogie?

APT wasn't far off achieving this, anyone know why tilting trains do not go faster than 140mph?

Mechanical reaction time/passenger comfort wasnt it? you cant comfortably alter the pitch back and forth at those speeds as at that speed the turns come too close together. Would feel like a rocking ship.

 

[Peter Mugridge]

It was the opposite problem wasn't it? The APT tilt was too good and passengers couldn't feel a thing so they got seasick because their eyes were telling their brain one thing ( from the view moving up and down ) while their stomachs were telling their brain the opposite ( no sensation of motion whatsoever ).

On the APT the tilt was designed to exactly mimic a level carriage.

On the 390s ( and every other titling train ) a small degree of lateral motion feel has been deliberately left in precisely to avoid this problem.

If people were on the APT at night or if they kept their eyes closed all the time, they would not have felt seasick at all.

 

[tbtc]

It was the opposite problem wasn't it? The APT tilt was too good and passengers couldn't feel a thing so they got seasick because their eyes were telling their brain one thing ( from the view moving up and down ) while their stomachs were telling their brain the opposite ( no sensation of motion whatsoever ).

On the APT the tilt was designed to exactly mimic a level carriage.

On the 390s ( and every other titling train ) a small degree of lateral motion feel has been deliberately left in precisely to avoid this problem.

If people were on the APT at night or if they kept their eyes closed all the time, they would not have felt seasick at all.

...so really what you are saying is that the APT's windows were too big - with matchbox sized windows they'd have avoided the seasickness?

 

[Peter Mugridge]

Hee hee hee... NO!!!!!!!:roll:

 

[WatcherZero]

I was refering to why it wasnt used faster than 140, not the APT.

 

[Via Bank]

But will be unable to tilt and so will give slower speeds north of HS2 than pendos.

Surely by the time this is built, alstom or siemens can come up with a high speed tilting bogie?

APT wasn't far off achieving this, anyone know why tilting trains do not go faster than 140mph?

Amtrak Acela Expresses (loco-hauled articulated sets, similar to a TGV, but equipped with tilt) have a maximum service speed of 150mph. If they were allowed to run as fast as they could, they'd top out at 165mph.