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| Train Types Maximum Speed 26/09/2016 at 11:27 #85395 | |
MarkC
1089 posts |
I was just thinking today, about the advent of bi-mode trains (ie:ac + diesel-power) and how they have a different maximum speed depending ton traction. Is it or would it be possible to create 2 or more max speeds for a train type, As it stands now I would have to create a train type (lets say) Class 800 which will be a Bi-mode and operates at 125mph (140 with modes) on AC power and 100 on diesel-power, so I would have to create 2 different train types, which would cause a power type mismatch, (and the need to add many new next train workings,) But if you could create one with the option of 2 different speeds, this has the added benefit of less timetableing (so less chance of TT errors) and also makes the train operate at the lower speed when operating on high speed lines of greater than 100mph if operating on diesel-power. With the advent of Bi-mode trains I think this addition may be benefical for future uses Last edited: 26/09/2016 at 11:28 by MarkC Reason: Corrections Log in to reply |
| Train Types Maximum Speed 26/09/2016 at 13:25 #85399 | |
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JamesN
1574 posts |
As it stands the 800s haven't had their top speed confirmed (just some design goals in the DfT specifications), and in testing on the GW they routinely run at 125mph on Diesel power. Once they enter squadron service on the GW, and electrification is complete there won't be anywhere unelectrified on any of the routes they're planned to operate on diesel power with Linespeed greater than 100mph. Not to mention none of the GW sims have been updated to include electrification, and all associated track and signalling changes yet. It's therefore somewhat premature to make significant changes to train characteristics implementation for a feature that quite possibly won't be required. Log in to reply |
| Train Types Maximum Speed 26/09/2016 at 19:16 #85429 | |
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clive
2737 posts |
mark265 in post 85395 said:I was just thinking today, about the advent of bi-mode trains (ie:ac + diesel-power) and how they have a different maximum speed depending ton traction. Is it or would it be possible to create 2 or more max speeds for a train type,Mantis 15926. Log in to reply The following user said thank you: MarkC |
| Train Types Maximum Speed 26/09/2016 at 20:20 #85432 | |
postal
5190 posts |
mark265 in post 85395 said:I was just thinking today, about the advent of bi-mode trains (ie:ac + diesel-power) and how they have a different maximum speed depending ton traction. Is it or would it be possible to create 2 or more max speeds for a train type,There may be a bit more to it than appears at first glance. Apart from the maximum speed issue (where the original specification demands 125mph but with the proviso that the electrically powered part of the drive train should allow for greater than that speed in the event of future line or signalling improvements) there is also the matter of acceleration. Depending on whether you have electric and diesel both supplying power, electric only or diesel only you are possibly going to have three different acceleration rates. Whether we have one train type with multiple parameters or different train types for different modes the TT writer is going to have to identify which power source is in use at any time in the journey so that the SimSig code can apply the correct settings for both speed and acceleration. Delving a bit deeper, section TS1577 of the original specification documents (https://web.archive.org/web/20090219040451/http://www.dft.gov.uk/pgr/rail/pi/iep/iepinvitationtotender/ieptraintechnicalspecifi.pdf) states that it is an essential requirement that a bi-mode IEP train shall be capable of switching between modes whilst at any speed from stationary up to line speed. If the train runs part of its journey on electric or dual power then diverges to a non-electrified route with the power change being done on the fly the code will be faced with a situation which it does not have at the present and I've no idea how complex that might be to program. Indeed it may be easier to code for that with a single train type with multiple parameters rather than different train types each with their own set of parameters. The same problem is also coming down the line with the Cl. 88 locos (4MW electric power and 0.7MW diesel) in the near future. “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 |
| Train Types Maximum Speed 26/09/2016 at 20:53 #85436 | |
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GW43125
495 posts |
A similar, more annoying than major issue, with the different subclasses of class 350 on the WCML. For example, you have: 350/1 MXS=110 PWR=AC 3DC 350/2 MXS=100 PWR=AC As you can probably tell, this causes a right faff when the two different types are connected and I cannot for the life of me find an easier way around than to perform a little fudgery on the division. Log in to reply |
| Train Types Maximum Speed 26/09/2016 at 21:10 #85438 | |
headshot119
4869 posts |
GW43125 in post 85436 said:A similar, more annoying than major issue, with the different subclasses of class 350 on the WCML.Just a point of order, Class 350/1s deployed with London Midland ARE NOT capable of picking up DC power as the pickup shoes have been removed. These where taken off after finishing on the Southern routes, and one or two that where loaned out in recent years had the equipment refitted for the lease period. "Passengers for New Lane, should be seated in the rear coach of the train " - Opinions are my own and not those of my employer Log in to reply |
| Train Types Maximum Speed 26/09/2016 at 21:17 #85439 | |
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MarkC
1089 posts |
GW43125 in post 85436 said:A similar, more annoying than major issue, with the different subclasses of class 350 on the WCML.This senareo is slightly different as any timetableing where the 2 different sub-class's that can run at 2 different speeds ran together they would as per the rule book run at the lower speed and only on spearation would the 350/1 train type be used for the higher speed, the scenario I envision with with bi-mode trains is that they do not split, and therefore the need for speed differentual Log in to reply |