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| Acceleration/Weights vs Timing Load 25/08/2014 at 16:29 #64112 | |
Danny252
1461 posts |
With the expanded combinations created by the train weight option, there's not much guidance as to what is a "heavy medium acceleration train" and what is a "light slow acceleration train". Is there any sort of mapping to timing loads/train weights that could be put on the wiki, or if not, could someone give some guidance as to what various timing loads should be entered as? I currently have no idea what Simsig acceleration settings should be applied to a Class 4 D400s to Class 6 D1800s, assuming they're different at all! (They probably are...) Log in to reply |
| Acceleration/Weights vs Timing Load 25/08/2014 at 18:27 #64117 | |
GeoffM
6288 posts |
It's not really related to the timing loads though, bizarre though that sounds. To use your examples, one can have an overpowered D1800 and an underpowered D400. Unfortunately it's more of an experimentation/observation process on a per-schedule basis.
SimSig Boss Log in to reply |
| Acceleration/Weights vs Timing Load 25/08/2014 at 19:13 #64119 | |
58050
2650 posts 
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When I write timetables I tend to go for the following options:- Light Electric locos(AC & DC) as well as light diesels = Light in weight category & Very High acceleration rate & that also includes shunt locos. Multiple units both diesel, DC & AC electric I use High(commuter) accelerarion rate & light weight category. Loco hauled trains both diesel & electric I use Medium(Inter-City) for the acceleration rate, however trains with 7-10 coaches I use the normal weight, less than 7 use light & more than 10 use heavy. Loaded freight trains both worked by diesel, AC or DC electric locos I use Very Slow acceleration rate & Heavy weight category. Empty or dis-charged freight trains I use Standard acceleration rate & Normal weight category. HSTs I use Medium(Inter-City) acceleration rate & normal weight category & that also applies to Cl.91s & sets of Mk.4 coaches & Eurostars. The only variants to these would be for track machines where the weight category would be Light, but the acceleration rate would either be Standard or Inter-City deoending on what track machine you are creating a train type for. The tick boxes on the right hand side of the train type box I also use, just remember to select 'SP' for 2nd generation units suchs as Sprinters & DMU for the 1st Generation units. Hope this helps. Log in to reply |
| Acceleration/Weights vs Timing Load 26/08/2014 at 10:46 #64139 | |
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58050
2650 posts
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Further to the above post for freightliner trains I tend to use the 'Heavy' weight category for trains with 20+ wagons, 'Normal' for trains with 15 freightliner flats & 'Light' for 5 or 10 freightliner flats. Freightliner trains can be a bit of an anomaly as they can convey & often do carry empty boxes on them. So when you see the train pass even though there maybe containers on them it doesn't necessarily mean they have a load in them. I tend to select the 'weight' category subject on the drag factor that train may have subject to the vehicles conveyed on it. A good example of this would be car trains. Although the gross tonnage isn't necessarily high in comparison to loaded oil, coal or aggregates trains, because they have a large number of car transporters in tow there are a high number of axles which produce drag. For example 4S39 1945 SX Dagenham Dock - Millerhill car train was usually worked by a scottish Cl.37/0 all the way to Millerhill(I've photographed this train on the ECML several times). The train was extremely long, but not as heavy as a block freight train, however due to the length of these trains the acceleration rate wasn't vwery quick even if the train was worked by a type 4 diesel as opposed to a type 3. 4L34 2233 SX Washwood Heath - Harwich could run with a length of 100SLUs = 640 metres, thisd train was booked to be worked by a Cl.47/0, but the train had a slow acceleration rate due to the drag factor of the number of axles behind the loco as opposed to the actual weight of the cars it was conveying, so the longer the train the slower the acceleration rate.
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