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| Acceleration rates in m/s2 or ft/s2 19/10/2015 at 14:52 #77059 | |
Re620
17 posts |
Hello, To get trains to behave as realistic as possible, would it be possible to list the numbers behind the acceleration rates in SimSig. I'm guessing they are either m/s2 or ft/s2? Thank you very much! Log in to reply |
| Acceleration rates in m/s2 or ft/s2 19/10/2015 at 15:40 #77061 | |
GeoffM
6288 posts 
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The rates come from various data sources including simply recording the acceleration of trains on green signals on level track. As such, it's not something I would like to share, sorry.
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| Acceleration rates in m/s2 or ft/s2 19/10/2015 at 15:46 #77062 | |
jc92
3631 posts |
what trains are you trying to enter? if you give us an idea we can give you the correct acceleration to use.
"We don't stop camborne wednesdays" Log in to reply |
| Acceleration rates in m/s2 or ft/s2 19/10/2015 at 17:08 #77064 | |
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Re620
17 posts |
Thank you for your quick replies. I wasn't trying to enter a certain type of train, it was more the result of an observation. I.e. on KGX stoppers are losing increasingly time (most timetables I played). I'm aware that this maybe an inherent flaw of the original WTT itself but there is also the point of acceleration since it seams only to affect stoppers which in turn depend on good acceleration very much. As an example: By looking at the very good units characteristics page I found the following. Class 313 VH, looking through the internet the Class 313 has a max. acceleration of 0.67m/s2, so I put VH ≈0.67m/s2. The same site lists the Class 365 as max. 0.67m/s2, but it only gets an high on the characteristics page. I understand that acceleration depends on many factors (loaded/empty, grip,...) but I found the difference a bit strange. Therefore I was hoping to get to know what values are behind the settings in the timetable editor to better understand how big the difference in numbers is, so I can better see the difference it makes. I'm respecting that you don't want to share your values for the reason named above, but maybe you could still shed some light in the timetable editor setting values? Thank you in advance. Sources for above example: http://www.SimSig.co.uk/dokuwiki/doku.php?id=usertrack:ttuse:munits#emu_dc https://www.eversholtrail.co.uk/fleet-portfolio Log in to reply |
| Acceleration rates in m/s2 or ft/s2 19/10/2015 at 18:00 #77068 | |
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GeoffM
6288 posts
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" said:Class 313 has a max. acceleration of 0.67m/s2, so I put VH ≈0.67m/s2. The same site lists the Class 365 as max. 0.67m/s2, but it only gets an high on the characteristics page.Manufacturers are understandably reluctant to provide detailed acceleration curve information which is why we had to go out and actually measure typical performance. The 0.67m/s2 you see is, as you say, a maximum but to be honest, is a bit meaningless. Typically commuter trains have excellent acceleration at low speeds but taper off almost as quickly (think of the lower left corner of a circle). HSTs have a straighter line, tapering towards zero at something like 140mph - which they obviously aren't supposed to get up to, but they still have a little oomph at 125mph. Possibly 365s would be better suited to very high rather than just high if they're losing time. Dual voltage units may also perform differently on 3rd rail versus overhead. SimSig Boss Log in to reply The following users said thank you: scottlowes, Re620 |
| Acceleration rates in m/s2 or ft/s2 19/10/2015 at 19:31 #77072 | |
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Jan
892 posts |
This page has a nice diagram giving a basic overview over the forces involved.
Two million people attempt to use Birmingham's magnificent rail network every year, with just over a million of them managing to get further than Smethwick. Log in to reply The following user said thank you: Re620 |
| Acceleration rates in m/s2 or ft/s2 19/10/2015 at 19:56 #77077 | |
postal
5196 posts
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You've got a fair range of different accelerations available in the TT anyway. You can either change the generic train type or the individual train TT over 5 steps of acceleration/braking and then in each acceleration step 3 weight classifications. If trains are consistently losing time, the TT can be amended with a lighter weight or quicker acceleration until you find the best combination to keep time.
“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 |
| Acceleration rates in m/s2 or ft/s2 19/10/2015 at 22:07 #77084 | |
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Re620
17 posts |
Thank you for putting things into perspective. It felt a bit like cheating to just amend the acceleration/braking settings. Especially since you have taken the time to collected the information in the unit characteristic page. I will do as Postal suggests and experiment a bit when confronted with a train consistently losing time. Have a good night. @Jan: Thank you for the link. It contains very good information! Log in to reply The following user said thank you: postal |