Ja das fragte ich mich auch schon lange... Woher wisst ihr wann und wie stark bremsen müsst? Es kann ja irgendwie nicht sein, das ganze S-Bahn Netz auswendig zu kennen?
Woher wisst ihr S-Bahn Fahrer wann ihr bremsen müsst. Gibts dafür ein Zeichen oder seut ihr die Strecke schon x-mal gefahren und kennt sie auswendig??
muß nicht sein ;-) weil hier ist die Linie S8 Richtung Flughafen/Airport abgebildet Standartgemäß auf der Linie ist immer Langzug(3*S-Bahnen) außer am So Vollzug(2*S-Bahn)
wahh wurd das vom lokführer selbst gemacht oder hat münchen ferngesteuerte züge wie kopenhagen? solch eine perspektive hat man in HH leider nicht (da ist aber auch nix beleuchtet im tunnel)
Mann, wie die erinnerungen zurück kommen! Ich bin geborn in Australien in 1967 von Deutsche eltern und war nur ein mal da in 1972 (kurz nach Olympiad) Ich muß sagen, die züge haben sich veendert! Ich erinnerer mich an Diesenhofen für irgendein grund... Ist auch komisch - die Züge sehen jetzt änlich auß wie mänchen die Siemens züge hie in Melbourne. Entschuldige bitten mein deutsch. Tschuß!
drivers nowadays have the order to roll the train to the station as early as it makes sense. it means very little loss of time but a big safe of energy.
Ok - rolling the train is one thing. When there is such short distances you only have to accelerate then rolling.
But it doesn't save much energy to brake slow - you have used the same amount of energy in the acceleration regardless of how early you start to brake. The only case it can save energy is if you have dynamic (regenerating) brakes and not have it on all wheels.
Braking slow is a big waste of time (as average speed decreases) and make it's boring when riding the train.
i'm not sure about that as all newer trains in germany have generators that are driven through the breaks. so when u break u dont use normal breaks but a gear that leads to a generator. so energy is put back to the supply-system. it could be that a slower break-instance is for the generator whereas emergency(quick-)break-instances are still done by ordinary breaks.
When there is such of short distances you only have to accelerate then rolling.
But brake slow doesn't save energy - you have used the same amount of energy in the acceleration regardless of how early you start braking. The only case it can save energy is if you have dynamic (regenerating) brakes but not on all wheels
Braking slow is a big waste of time (as average speed decreases) and it's boring when riding the train.
The efficiensy is normally pretty constant on a generator regardless if you're braking fast or slow but if the generator is "hooked up" only to a few wheels you can only use the friction from those without use the friction brakes (and lose energy)
Many newer trains (as our commuter trains Alstom X60) reverse the motors and use them as generatiors (makes it easier to distribute the braking force between the wheels - as every axel have it's own motor)
hm, so every part of the train is a motor coach? that sounds a bit maintenance-intensive. i dont think this is useful for longer trains as we use them in Berlin on the public transportation system. but they are trying arround with that technology on buses. they are diesel-electric and the e-motor is on the axis/wheel.
One more thing when studying this video - I can hear the squeeling sound from the friction brakes. That means the dynamic brakes have probably not "higher priority" by the controllers because the friction brakes is used even in that slow braking
If the force distribution between the weels are the same regardless of the total braking force, he will not save energy at all with slow braking
When studying the video closer I hear the squeeling sound from the friction brakes -meaning that the friction brake is used even in that slow braking. The system are probably not "prioritising" the dynamic brake.
If the force distibution between the weels is the same the regardless of the total braking force, he will not save energy at all by slow braking
That braking took 50 secs - if he vas going 80 km/h (22,22 meters/sec) braking is only 22,22/50=0,44 m/s² (time average), that's very slow, he could do at least 1,2 m/s². If you asume the braking is linear the braking distance is 22,22^2/0,44/2 = 555,6 m compared to 22,22^2/1,2/2 = 205,8 m. The difference (that have to be traveled at 80 km/h) is 555,6-205,8 = 349,8 m and the time loss is
50-(22,22/1,2 + 349,8/22,22) = 15,7 secs (that is on every 80-0 km/h braking)
In the practical calculations most brakings is far from linear - some drivers brake way to early and have to roll very slow at the end (that wastes a lot of time). This driver seemed pretty skilled even if he is slow.
A non skilled driver braking with a maximum deceleration of 1,2 m/s² may use the same time as a skilled driver braking that slow, but a slow non skilled can loose 35 secs compared to a skilled braking fast. About 16 secs shud be a pretty good average model of the timeloss.
Ja das fragte ich mich auch schon lange... Woher wisst ihr wann und wie stark bremsen müsst? Es kann ja irgendwie nicht sein, das ganze S-Bahn Netz auswendig zu kennen?
kephivo 11 months ago
An welcher S-Bahn Linie liegt Unterföhring?
DYASAM1 2 years ago
@DYASAM1 Linie S8
BergfelderVideos780 2 months ago
@DYASAM1 Linie S8. Diese Linie fährt u.a. Richtung Flughafen.
xray087 1 month ago
unterföhring is nich weit weg von münchen xD:P
Budgieflo 2 years ago 2
Nice video ;)
Ist das in München? Danke für jede Antwort ;-)
index199 2 years ago 2
hehe! Son Vid mach ich auch mal von unserer Automatischen UBahn. die erste in Deutschland :P
In koppenhagen gibts ne Ferngesteuerte? oder is die auch automatisch?
NbgKanalchiller 2 years ago
du kommst gerade von insamnig stimmts xD
minsch123 3 years ago
faszinierend:) schönes video!
bist du wirklich lokführer?:)
reinerdrossard 3 years ago
Woher wisst ihr S-Bahn Fahrer wann ihr bremsen müsst. Gibts dafür ein Zeichen oder seut ihr die Strecke schon x-mal gefahren und kennt sie auswendig??
GermanEurovisionFan 3 years ago
Sie wissen alles auswendig da du es in der ausbildung lernst
meikel5265 3 years ago
nice video, good job !
terpentinos 3 years ago
Also, das ich soweit gefahren bin ist eine Täuschung ;)
Ein Langzug fährt ganz ans Ende vom Bahnsteig. Ich hielt etwa 5 m hinter der Vollzugtafel, da ich sanft halten wollte für das Video.
skaterboy20muc 3 years ago
Für mich sah es so aus .
Weil in Frankfurt teilweise die Bahnsteige
Länger sind als ein Langzug .
Melaba 3 years ago
Sers@ll
@melaba "wenn man aufpasst hällt
er am Lang-zg Halteschild."
muß nicht sein ;-) weil hier ist die Linie S8 Richtung Flughafen/Airport abgebildet Standartgemäß auf der Linie ist immer Langzug(3*S-Bahnen) außer am So Vollzug(2*S-Bahn)
fautchr 3 years ago
wahh wurd das vom lokführer selbst gemacht oder hat münchen ferngesteuerte züge wie kopenhagen? solch eine perspektive hat man in HH leider nicht (da ist aber auch nix beleuchtet im tunnel)
Plunschist 3 years ago
ne keine ferngesteuerten.....war wohl der lokführer :) btw....ufg 4ever xD
college91 3 years ago
Das muss während der Haupt-Verkehrs-Zeit
gewesen sein den wenn man aufpasst hällt
er am Lang-zg Halteschild.
Melaba 3 years ago
Mann, wie die erinnerungen zurück kommen! Ich bin geborn in Australien in 1967 von Deutsche eltern und war nur ein mal da in 1972 (kurz nach Olympiad) Ich muß sagen, die züge haben sich veendert! Ich erinnerer mich an Diesenhofen für irgendein grund... Ist auch komisch - die Züge sehen jetzt änlich auß wie mänchen die Siemens züge hie in Melbourne. Entschuldige bitten mein deutsch. Tschuß!
logofreetv 4 years ago
That's cool, but what a slow braking at the station
C20rules 4 years ago
drivers nowadays have the order to roll the train to the station as early as it makes sense. it means very little loss of time but a big safe of energy.
blazey234 4 years ago
Ok - rolling the train is one thing. When there is such short distances you only have to accelerate then rolling.
But it doesn't save much energy to brake slow - you have used the same amount of energy in the acceleration regardless of how early you start to brake. The only case it can save energy is if you have dynamic (regenerating) brakes and not have it on all wheels.
Braking slow is a big waste of time (as average speed decreases) and make it's boring when riding the train.
C20rules 4 years ago
i'm not sure about that as all newer trains in germany have generators that are driven through the breaks. so when u break u dont use normal breaks but a gear that leads to a generator. so energy is put back to the supply-system. it could be that a slower break-instance is for the generator whereas emergency(quick-)break-instances are still done by ordinary breaks.
blazey234 4 years ago
When there is such of short distances you only have to accelerate then rolling.
But brake slow doesn't save energy - you have used the same amount of energy in the acceleration regardless of how early you start braking. The only case it can save energy is if you have dynamic (regenerating) brakes but not on all wheels
Braking slow is a big waste of time (as average speed decreases) and it's boring when riding the train.
C20rules 4 years ago
i guess we mean the same thing by dynamic breaks vs generator-breaks.
the average speed ist declining very much. considering u travel 10 stations and the break-way takes 5 secs longer it's not even a minute u lose.
what u mean is a subjective feeling of a longer turn cause it seems boring for u.
blazey234 4 years ago
The efficiensy is normally pretty constant on a generator regardless if you're braking fast or slow but if the generator is "hooked up" only to a few wheels you can only use the friction from those without use the friction brakes (and lose energy)
Many newer trains (as our commuter trains Alstom X60) reverse the motors and use them as generatiors (makes it easier to distribute the braking force between the wheels - as every axel have it's own motor)
C20rules 4 years ago
hm, so every part of the train is a motor coach? that sounds a bit maintenance-intensive. i dont think this is useful for longer trains as we use them in Berlin on the public transportation system. but they are trying arround with that technology on buses. they are diesel-electric and the e-motor is on the axis/wheel.
blazey234 4 years ago
It shud work even on longer trains but maybe it takes more advanced controllers to calculate the braking acceleration force on every axel.
Longest commuter trains we have is 214 m - most stations are not much longer so i dont know if there are any limitations there.
C20rules 4 years ago
Thats really anoying the comments disapphear on YouTube sometimes - hope my last one is showed :-(
C20rules 4 years ago
One more thing when studying this video - I can hear the squeeling sound from the friction brakes. That means the dynamic brakes have probably not "higher priority" by the controllers because the friction brakes is used even in that slow braking
If the force distribution between the weels are the same regardless of the total braking force, he will not save energy at all with slow braking
C20rules 4 years ago
When studying the video closer I hear the squeeling sound from the friction brakes -meaning that the friction brake is used even in that slow braking. The system are probably not "prioritising" the dynamic brake.
If the force distibution between the weels is the same the regardless of the total braking force, he will not save energy at all by slow braking
C20rules 4 years ago
That braking took 50 secs - if he vas going 80 km/h (22,22 meters/sec) braking is only 22,22/50=0,44 m/s² (time average), that's very slow, he could do at least 1,2 m/s². If you asume the braking is linear the braking distance is 22,22^2/0,44/2 = 555,6 m compared to 22,22^2/1,2/2 = 205,8 m. The difference (that have to be traveled at 80 km/h) is 555,6-205,8 = 349,8 m and the time loss is
50-(22,22/1,2 + 349,8/22,22) = 15,7 secs (that is on every 80-0 km/h braking)
C20rules 4 years ago
In the practical calculations most brakings is far from linear - some drivers brake way to early and have to roll very slow at the end (that wastes a lot of time). This driver seemed pretty skilled even if he is slow.
A non skilled driver braking with a maximum deceleration of 1,2 m/s² may use the same time as a skilled driver braking that slow, but a slow non skilled can loose 35 secs compared to a skilled braking fast. About 16 secs shud be a pretty good average model of the timeloss.
C20rules 4 years ago
Gut gemacht. Kommt ziemlich profimässig rüber.
MasterSurfer80 4 years ago