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| Favorite train operators 15/04/2013 at 19:55 #43542 | |
postal
5190 posts |
" said:Eurostar and TGV are EMU's, yes they have power cars, but also powered bogies in most of the coachesI know Wikipedia is not always the most reliable of sources, but it gives the following information for Eurostar and TGV: Eurostar (branded as BR Cl 373): There are four powered axles in each power car and one additional bogie in the adjacent passenger carriage. TGV (Sud-Est which was first variant): Each set is made up of two power cars and eight carriages (capacity 345 seats), including a powered bogie in each of the carriages adjacent to the power cars. So not strictly HST type formation as there is an additional powered bogie under a passenger vehicle adjacent to each power car, but hardly classical DMU/EMU formation either. Doesn't detract from my original point about Newton's Laws of Motion. You put enough grunt anywhere in the train that you like and it will go as fast as you want. If you could shoehorn 4000hp worth of cast iron into each HST power car instead of the existing 2250hp or so, it would be waiting time everywhere along the MML rather than being slower than a Meridian. There are no intrinsic properties of either loco-hauled or DMU/EMU types that makes one faster than the other, it is only a case of what question was asked and how the engineers solved it. “In life, there is always someone out there, who won’t like you, for whatever reason, don’t let the insecurities in their lives affect yours.” – Rashida Rowe Last edited: 15/04/2013 at 20:43 by postal Log in to reply |
| Favorite train operators 15/04/2013 at 20:32 #43544 | |
Peter Bennet
5360 posts |
" said:Rickurd wrote:Can't comment on the staff point of view. As an enthusiast the 1980's were the best stock-wise particularly when trains broke down and you got rescued by a rare freight engine. Now I just want to get home quickly and in comfort, which I do, so as a commuter now is infinitely better. Peter I identify as half man half biscuit - crumbs! Log in to reply |
| Favorite train operators 15/04/2013 at 20:36 #43545 | |
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Peter Bennet
5360 posts |
" said:" said:For any given power output is there an optimum number of powered axles? For example is a 3300hp output Co-Co better than a 3300hp Bo-Bo?Eurostar and TGV are EMU's, yes they have power cars, but also powered bogies in most of the coachesI know Wikipedia is not always the most reliable of sources, but it gives the following information for Eurostar and TGV: Peter I identify as half man half biscuit - crumbs! Log in to reply |
| Favorite train operators 15/04/2013 at 21:01 #43546 | |
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postal
5190 posts |
" said:For any given power output is there an optimum number of powered axles? For example is a 3300hp output Co-Co better than a 3300hp Bo-Bo?Depends on things like axle load, rail conditions etc. The tractive force that can be applied before the wheel starts slipping is governed by the applied downward load and the coefficient of friction. Steel on steel has a low coefficient of friction as compared with say rubber on tarmac and the coefficient of friction drops as the interface is lubricated with oil, leaves or whatever. So you come back to the balance between cost and requirement. You want the minimum number of powered axles for cost purposes, but you want the maximum number you can have so that the power needed to haul the train is distributed over the greatest number of axles possible. The tractive force each axle then needs to exert on the rail is less so there is more scope for effective traction even if the rail surface is contaminated. However, an axle with a 20t load (as under a typical locomotive) can transmit more force for the same rail conditions than one under a 10t load (40t EMU carriage say) because of the relationship between axle load and achievable tractive force. So a 120t. 3300hp Co-Co should be more effective at getting the power onto the rail than a 80t 3300hp Bo-Bo or 120t A1A-A1A but will cost more to build. You pays your money and you takes your choice. “In life, there is always someone out there, who won’t like you, for whatever reason, don’t let the insecurities in their lives affect yours.” – Rashida Rowe Log in to reply |
| Favorite train operators 15/04/2013 at 21:06 #43547 | |
58050
2650 posts |
Peter Bennet wrote: Quote:
I would say definately yes,it like comparing the Cl.89 against a Cl.91. The Cl.89 was a much more superior traction unit in all respects. Log in to reply |
| Favorite train operators 15/04/2013 at 22:25 #43549 | |
JamesN
1575 posts 
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DB Schenker
Last edited: 15/04/2013 at 22:32 by JamesN Log in to reply The following users said thank you: officer dibble, DriverCurran, andyb0607, crompton |
| Favorite train operators 15/04/2013 at 22:26 #43550 | |
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officer dibble
390 posts |
Network Rail NDS
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| Favorite train operators 15/04/2013 at 22:29 #43551 | |
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Hpotter
205 posts |
FLHH - For the rescues! :lol:
Log in to reply The following users said thank you: JamesN, officer dibble, DriverCurran |
| Favorite train operators 15/04/2013 at 22:30 #43552 | |
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JamesN
1575 posts
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" said:Network Rail NDSWhat's Network Rail NDS? Log in to reply The following user said thank you: officer dibble |
| Favorite train operators 15/04/2013 at 22:30 #43553 | |
DriverCurran
683 posts |
I have to go with the top company BBRL Paul You have to get a red before you can get any other colour Log in to reply The following user said thank you: officer dibble |
| Favorite train operators 15/04/2013 at 22:31 #43554 | |
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officer dibble
390 posts |
Ballast, Sleepers, wagons, phwaor!!!!!
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| Favorite train operators 15/04/2013 at 22:44 #43555 | |
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sloppyjag
480 posts |
Now approaching my 3rd year with my current employer I am almost fully Sercomcised and therefore I feel oddly compelled to love both Northern Rail and Merseyrail. :woohoo: (This despite having never travelled with either TOC! :whistle: )
Planotransitophobic! Last edited: 15/04/2013 at 22:46 by sloppyjag Log in to reply |
| Favorite train operators 16/04/2013 at 00:08 #43556 | |
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DanC
53 posts |
" said:Now approaching my 3rd year with my current employer I am almost fully Sercomcised and therefore I feel oddly compelled to love both Northern Rail and Merseyrail. :woohoo: (This despite having never travelled with either TOC! :whistle: )Thats funny because Northern rank very low with me! My top 5: 1. Virgin 2. East Midlands Trains 3. Cross Country 4. Southwest 5. London Midland Bottom 5: 1. Northern Rail 2. Merseyrail 3. TPE 4. FGW 5. Any other First operated route... Log in to reply |
| Favorite train operators 16/04/2013 at 00:24 #43557 | |
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vontrapp
210 posts |
" said:West Coast Railway Company, because they are the only TOC to exclusively operate proper trains. ...and create chaos, within a week! Log in to reply |
| Favorite train operators 16/04/2013 at 01:34 #43559 | |
CTCThiago
232 posts |
UK: Top 3 1. FCC 2. Greater Anglia 3. London Midland Log in to reply |
| Favorite train operators 16/04/2013 at 09:25 #43563 | |
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kbarber
1712 posts |
" said:well BR dont exist now. So? Still a favourite with some of us... old BR knew how to run a railway! Log in to reply The following user said thank you: crompton |
| Favorite train operators 16/04/2013 at 09:48 #43564 | |
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58050
2650 posts |
Well said Keith, my sentiments exactly.
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| Favorite train operators 16/04/2013 at 16:04 #43568 | |
Steamer
3922 posts |
" said:" said:No more than these modern trains that don't couple to anything else cause when they sit down...West Coast Railway Company, because they are the only TOC to exclusively operate proper trains. 
"Don't stress/ relax/ let life roll off your backs./ Except for death and paying taxes/ everything in life.../ is only for now." (Avenue Q) Last edited: 16/04/2013 at 16:09 by Steamer Log in to reply The following user said thank you: Signalhunter |
| Favorite train operators 16/04/2013 at 20:16 #43585 | |
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Forest Pines
525 posts |
" said:Don't forget that Eurostar, DB ICE and SNCF TGV are all similar to the HST in that they have a power car at each end with passenger stock in between and they are all a tad quicker than a Voyager or Meridian.Only the first two generations of ICE use power cars. The later (and faster) ICE 3, ICE 3M and Velaro D are EMUs with four cars powered out of eight, and the tilting ICE T sets are EMUs with either 5 out of 7 or 3 out of 5 cars powered. The ICE TD sets used on Germany-Denmark services are tilting 4-car DMUs with one power bogie and one non-powered bogie on every car. Log in to reply |
| Favorite train operators 19/04/2013 at 15:37 #43705 | |
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47417
13 posts |
QR
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