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Old January 23rd, 2012, 06:58 AM   #61
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Quote:
Originally Posted by makita09 View Post
With ease, but I imagine very slow acceleration. With the kind of distances they do between stops its a fair trade off.
Trains that fall under superfast(IR) category do not have that many stops. For example TamilNadu Express that connects Chennai and Delhi has only 8 stops for a distance of 2200 km. WAP-7 needs 10km to accelerate 24 coach express to 140 kmph.
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Old January 23rd, 2012, 07:10 AM   #62
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Old January 23rd, 2012, 07:19 AM   #63
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Old January 25th, 2012, 02:43 AM   #64
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mute!


Tell me, please, what type of cars are the first and last ones filmed in the above-shared video, for I notice that type with its flush grilling popular on many of the Indian ones?



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Old January 25th, 2012, 08:40 AM   #65
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If I'm not mistaken that's the baggage/postal car.
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Old January 25th, 2012, 02:31 PM   #66
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It says on the car that itīs the Luggage, Brake and Generator car.

The generator is to provide power for the other cars, the locomotive canīt provide energy for the whole train on itīs own. The brake, is for the extra breaking power needed for such a long train.
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Old January 25th, 2012, 02:33 PM   #67
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Could be, but modified to generate electricity? I see blackened rooftops...sorry question after a good answer!!!
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Old January 25th, 2012, 03:00 PM   #68
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Yes, thereīs a diesel generator in the car that makes the electricity for the electrical equipment, like the air conditioning in all the cars of the train.
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Old January 25th, 2012, 05:40 PM   #69
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Thanks guys!!
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Old January 26th, 2012, 02:31 AM   #70
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Ah right, thank you Momo1435 ... I hadn't imagined it including luggage.
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Old January 26th, 2012, 05:26 AM   #71
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Old January 26th, 2012, 08:41 PM   #72
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Didn't realize it's a generating car as well, why can't it draw electricity directly from the overhead wire instead of using diesel generator?
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Old January 26th, 2012, 11:08 PM   #73
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Maybe its loco's switched with a diesel-electric one once it must travel under no wire?
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Old January 27th, 2012, 06:50 PM   #74
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Quote:
Originally Posted by trainrover View Post
Maybe its loco's switched with a diesel-electric one once it must travel under no wire?
Well, diesel-electric locos can also produce electricity for passenger cars.
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Old January 27th, 2012, 09:00 PM   #75
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I think the reason why there are generator cars is because the network around Mumbai is electrified with 1.5kV DC. This system is too weak to provide the whole train with energy through the wires. But I see on several websites that it's being converted to 25kV AC, that should make the generator cars redundant.

Unless it's simply used as an independent energy source to be sure there's always enough power in the train even if there's a power failure or if they simply have to change the loco. If the airco stops working in the Indian heat it's not really pleasant to be stuck in a coach where the windows can't be opened.
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Old January 27th, 2012, 09:54 PM   #76
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Found another HSR-related race, between a standard train and one of Japan's old 500 系 Shinkansen



Again, video isn't mine. Thank youtube.

Last edited by Silver Swordsman; January 27th, 2012 at 10:28 PM.
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Old January 28th, 2012, 01:14 AM   #77
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Found this link which tells about generator cars and how they are positioned

http://bhagirathi.iitr.ac.in/dspace/...89/642/1/4.pdf

Quote:
Generator car cum Luggage Van is a mobile power house for
the train. It supplies all the electrical load demand of the train.
Several electrical equipments are provided onboard and under
frame structure of the generator car for generation &
controlling of power supply. These onboard equipments are
known as Superstructure equipments and under frame
equipments are known as substructure equipments. Some
important superstructure equipments are transformer, Inter
vehicle couplers, Heat Exchanger (Radiator), Roof Extractor
Unit, Side body filter, Starting battery & charger, A/C Control
Panel. The space below the coach is also used properly for
fitment of electrical equipments. Major electrical equipments
mounted on under frame of generator car for system of Endon-
generation are Fuel Tank, Emergency battery & Charger,
Lighting transformer, Junction boxes, Compressor &
Condenser Units for air-conditioned plants.Figure 1 shows the
typical schematic diagram of Generator Car cum Luggage
Van.


Generator car cum luggage brake vans are placed in front and
rear end of the train & coaches in between them. These
coaches receive power supply at 750 V, 3 Φ, 4 wire, and 50
Hz supply from a Generator car provided at each end of the
rake. Fig. 2 shows the block diagram of distribution of power
supply in the rake of Swarn Shatabdi Express Train
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Old January 28th, 2012, 02:12 AM   #78
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Pretty short video showing the slow older train then the CRH3 speeding past it.

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Old January 28th, 2012, 05:16 AM   #79
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Great videos from Japan and China!!!

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Old January 28th, 2012, 02:10 PM   #80
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Quote:
Originally Posted by XAN_ View Post
Well, diesel-electric locos can also produce electricity for passenger cars.
I would rather say that not every Diesel-electric loco has the power to generate or has a connection. Given the case, in talgo IV passenger units for example, they use a generator car in electrified lines.
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