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Valenta HST Driving Technique

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Kurolus Rex

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Try Amazon or eBay, I got my copy for £15

Perhaps, though I've got plently of other stuff i want to get that are a higher priority for me personally. I'm still in education and don't have a job really so getting money isn't very easy. Not saying it's not worth the money, just a lower priority for me right now.
 
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hexagon789

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Perhaps, though I've got plently of other stuff i want to get that are a higher priority for me personally. I'm still in education and don't have a job really so getting money isn't very easy. Not saying it's not worth the money, just a lower priority for me right now.

No problem, just a suggestion if you wanted the fine detail :)
 

Kneedown

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You select brake release and simultaneously apply power. The amps will have risen before the brakes fully release on an HST and on the level applying power with the brakes fully released is preferable anyway, it's only an issue on an uphill gradient where you want to to avoid running back of course.

The CORRECT technique, as I was taught, and taught trainees on EMT, is to maintain step 2 at a stand, apply power, observe amps rise and THEN release the brake.
This process guards against rollback if you have inadvertently left the DRA in or forgotten to return the brake test switch to normal position.
 

Kurolus Rex

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The CORRECT technique, as I was taught, and taught trainees on EMT, is to maintain step 2 at a stand, apply power, observe amps rise and THEN release the brake.
This process guards against rollback if you have inadvertently left the DRA in or forgotten to return the brake test switch to normal position.

This is the technique i've seen used in this video:

It would maybe take a few seconds longer at most whilst also being safer. Whilst in normal circumstances it may work fine, if something happens during the departure process that prevents you from taking power, there's no risk of you rolling back.
 

hexagon789

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The CORRECT technique, as I was taught, and taught trainees on EMT, is to maintain step 2 at a stand, apply power, observe amps rise and THEN release the brake.
This process guards against rollback if you have inadvertently left the DRA in or forgotten to return the brake test switch to normal position.

I'm just quoting from a book, I can completely understand why you'd hold the brake until amps build.
 

SPADTrap

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The CORRECT technique, as I was taught, and taught trainees on EMT, is to maintain step 2 at a stand, apply power, observe amps rise and THEN release the brake.
This process guards against rollback if you have inadvertently left the DRA in or forgotten to return the brake test switch to normal position.
Yep, I teach this as well...
 

SPADTrap

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I've seen enough cavalier attitudes prevailing in other areas of industrial preservation. I don't think there is too much conspiracy here!

The engines are pretty hardy, you'd have to do a lot to damage it with your driving style! That said, when the EC boys and girls get hold of a VP set it doesn't come back the same <( :lol:
 

43096

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I've seen enough cavalier attitudes prevailing in other areas of industrial preservation. I don't think there is too much conspiracy here!
Nothing quite like sweeping generalisations and tarring everyone with the same brush, is there?
:rolleyes:
 

Railperf

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The engines are pretty hardy, you'd have to do a lot to damage it with your driving style! That said, when the EC boys and girls get hold of a VP set it doesn't come back the same <( :lol:
in what way? I would imagine the VP sets had to endure a lot more full power running on the ECML due to the nature of the route and length between some stops.
I did travel aboard a hired-in VP powered EMT 8-coach set on a Kings Cross to York stopper, and to be honest i was disappointed with its acceleration compared to the MTU powered LNER 9-coach sets.
 

hexagon789

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quite a lively departure

Sounds like at least notch 4, if not 5 applied as the train passes the camera.

Indeed! Look at that acceleration o_O

They can fairly shift when they want to! Brand new, the performance knocked spots off everything really ;)

It's also 40 out of Paddington on many platforms so they can get up more speed than exiting the likes of King's Cross or St Pancras.
 

driver_m

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Quite amusing reading this thread. I still thank the railway gods for allowing me to drive these magnificent machines, even if they were absolutely knackered at the time and I was only a trainee. But because of much of the restrictive speeds leaving stations where I worked, I tended to do 2, then 4 then 5 eventually. Though I did go straight to 4 at Watford or MK when I’d stopped there a couple of times! It would have been rude not to have indulged in a bit of power. We had travelling fitters riding round with us at the time and some were restricted to a max notch 4 only
 

Kurolus Rex

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Sounds like at least notch 4, if not 5 applied as the train passes the camera.



They can fairly shift when they want to! Brand new, the performance knocked spots off everything really ;)

It's also 40 out of Paddington on many platforms so they can get up more speed than exiting the likes of King's Cross or St Pancras.

Definitely Notch 5. Never seen a HST accelerate that quickly in a station before.

It's just unusual to see a HST departing so quickly. HSTs have never been slow at departing but i've never seen anything quite like that before.
 

randyrippley

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Thank you for this thread. This video clip is relevant and perhaps ex Valenta drivers could also comment on the technique here -
which is somewhat spectacular - possibly by arrangement?

that sounded quite quiet compared to when they were new.........the turbo scream was originally much more shrill
 

SPADTrap

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in what way? I would imagine the VP sets had to endure a lot more full power running on the ECML due to the nature of the route and length between some stops.
I did travel aboard a hired-in VP powered EMT 8-coach set on a Kings Cross to York stopper, and to be honest i was disappointed with its acceleration compared to the MTU powered LNER 9-coach sets.
It was a joke really, I drive both types and the MTU definitely puts its power down quicker.
 

ac6000cw

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quite a lively departure
I've seen (and heard!) similarly enthusiastic departures from Peterborough and Stevenage back in Valenta days - it wasn't that unusual for the rear power car to be at or near full power by the time it went past. Remember that the 4500 hp wasn't just for maintaining 125 mph, it also enabled faster acceleration away from stops - that was an important part of the service improvement that HSTs bought to the table. It's a waste of money if you buy high-performance trains and then don't use their full capability whenever it's beneficial.
 

SPADTrap

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I've seen (and heard!) similarly enthusiastic departures from Peterborough and Stevenage back in Valenta days - it wasn't that unusual for the rear power car to be at or near full power by the time it went past. Remember that the 4500 hp wasn't just for maintaining 125 mph, it also enabled faster acceleration away from stops - that was an important part of the service improvement that HSTs bought to the table. It's a waste of money if you buy high-performance trains and then don't use their full capability whenever it's beneficial.

There's no reason you can't get a VP185 to full power before the backs off the platform, I rarely see one depart in any other way on my line, power up smoothly as the engine revs up and its smooth and you get maximum amps from low speed. A good set you'll see 1600/1700amps from low speed and it gets you moving and the engine purs. Just let a VP clear single bank firing first.

Take power in notch one and release the step 2 holding brake, as the set moves off notch 2 and it'll clear single bank firing and before each notch settles increase the power notch by notch to full, the engine will steadily rev up without pausing in each notch and you're away with 1600/1700amps in no time.
 
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delticdave

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The CORRECT technique, as I was taught, and taught trainees on EMT, is to maintain step 2 at a stand, apply power, observe amps rise and THEN release the brake.
This process guards against rollback if you have inadvertently left the DRA in or forgotten to return the brake test switch to normal position.
Perhaps off-topic, but I've been lucky enough to have a few cab-rides on Montreal suburban trains, (diesel loco hauled push-pull stock) & departures usually were as follows:- The train would have been stopped & held on the train brakes, (the loco's have a valve which disables the loco brakes when using the automatic brake). Just before departure the power controller would be moved to notch 1, (out of 8) & the train brakes released when then conductor gave the signal to depart. The reason quoted was to keep the couplers taut & to enable a faster start without having for the engine to "load". I was surprised, 'cos the loco's concerned were all EMD units with 2-stroke engines, rather than the slow-loading GE's that were used in freight service on the same tracks.

Not possible when being driven from the cab-car, of course, but the couplers would be in compression so no real problem when starting.
 
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