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Old March 21st, 2012, 04:42 PM   #221
ruready1000
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Quote:
Originally Posted by aquaticko View Post
Anyone know why they would switch? Are conventional bogies cheaper, or what are the advantages vs. a jacobs bogie?
I saw some railfans' assumption such as 'to reduce the axle loads to below 13 ton (KTX-II : 17 ton)', it may be harder to put power on jacob bogie', and 'to avoid (possible) patent problems' etc.

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Originally Posted by aquaticko View Post
Having those hump things on top of the trains is...unusual, isn't it? I know that this train is switching from a locomotive to an EMU setup, but I don't remember seeing anything like that on other EMU's. It also seems pretty unhelpful for aerodynamics, which are particularly important here considering the +350km/h operating speeds this is set for.

Anyone have a clue to all this? All that aside, it is a pretty train.
Do you mean the pantograph cover? According to Next Generation High Speed Rail Technology Center homepage (in charge of the project), it's for decreasing drag and acoustic noise.


They tested 4 models (left image) and proposed one model (right one).
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Old March 21st, 2012, 04:48 PM   #222
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The fairings are designed not only for aerodynamics, but also (and likely primarily) to reduce noise as pantograph noise is a problem at high speeds. It appears Hyundai Rotem is emphasizing environmental benefits of their trainset in addition to high speed.

For reference- 500 series shinkansen pantograph fairing:
http://img2.blogs.yahoo.co.jp/ybi/1/...8_0?1259334138
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Old March 21st, 2012, 07:03 PM   #223
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I bet that they are testing different designs on the pantograph fairings on that train (seeing that it's a test train) and that the final design will only have 2 of them on the whole train, making it look a lot smoother.

Speaking of massive pantograph fairings, nothing come close to the Japanese 300X ones in size and shape. It's one of those things that make it one of the best looking trains ever made in my eyes, especially with that end car that is showing (the other one looks a lot worse though).


Source of the image: http://en.wikipedia.org/wiki/300X
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Old March 22nd, 2012, 04:16 AM   #224
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So are the prototypes already made and being tested now?
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Old March 22nd, 2012, 08:18 AM   #225
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So are the prototypes already made and being tested now?
Yes. As far as I know, they are doing in-house testing now.



bigger image
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Old March 23rd, 2012, 08:51 AM   #226
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Sweet. Any bilevel train version that was designed, any news on that?

I guess the demand wouldnt be up to where bilevel trains are needed at this point in time.
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Old March 23rd, 2012, 11:10 AM   #227
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Sweet. Any bilevel train version that was designed, any news on that?

I guess the demand wouldnt be up to where bilevel trains are needed at this point in time.
There was one news out of nowhere about duplex high speed train one month ago, saying the prototype of duplex high speed train would be introduced next month. source(korean)

I don't know whether the prototype acutally exists or it's just a misinformed news because I've never heard of it and I can't find another article or source aside from this one. There's surely one picture of duplex design at HEMU-400X official homepage, but it just says ' modelling and rendering of duplex design ' and gives no comment on making prototype. So let's wait and see.

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Old March 23rd, 2012, 01:39 PM   #228
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To be honest, that theoretical Korean Duplex looks a lot more aesthetically appealing the HEMU-400X
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Old March 23rd, 2012, 03:51 PM   #229
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Quote:
Originally Posted by Silver Swordsman View Post
To be honest, that theoretical Korean Duplex looks a lot more aesthetically appealing the HEMU-400X
Although suspiciously similar to the concept that was put forward by (a firm who's name I an't remember) for the British High speed rail system being developed.

Also, love the HEMU, not too hot on the roofline, of course being a protoype, I'm sure it'll change.
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Old March 23rd, 2012, 08:45 PM   #230
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Quote:
Originally Posted by Silver Swordsman View Post
To be honest, that theoretical Korean Duplex looks a lot more aesthetically appealing the HEMU-400X
I was gonna say the same thing, the duplex looks cool. The 400X still gives people the impression that it's a locomotive driven train due to the drive car's white out windows and enlarged pantograph fairing.
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Old March 24th, 2012, 04:13 AM   #231
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Quote:
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I was gonna say the same thing, the duplex looks cool. The 400X still gives people the impression that it's a locomotive driven train due to the drive car's white out windows and enlarged pantograph fairing.
Why are the windows of car 1 white?
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Old March 24th, 2012, 04:38 AM   #232
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I think thats supposed to be reflected light from sun or something.
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Old March 25th, 2012, 05:34 AM   #233
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Why are the windows of car 1 white?
I don't know, considering other windows are not white I'd imagine that means the front 3/4 of the drive car is for equipment, different from other EMUs.
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Old March 25th, 2012, 09:07 AM   #234
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Originally Posted by nouveau.ukiyo View Post
Why are the windows of car 1 white?
Not a official comment or source, but I saw at a railfan's blog that rheostatic brake equipment was installed in that area.
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Old March 28th, 2012, 09:39 AM   #235
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Not a official comment or source, but I saw at a railfan's blog that rheostatic brake equipment was installed in that area.
I received Railers magazine featuring HEMU-430X yesterday. According to this magazine, original plan was to install rheostatic brake at the MC car, but this plan was cancelled during the development process, so no rhesotatic brake is installed on MC car (test equipment is installed instead), even though the appreance of the car looks so.


source : Railers magazine
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Old March 28th, 2012, 10:45 AM   #236
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So in the production model, those blacked out portions of car 1 will be passenger seats?
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Old March 29th, 2012, 12:47 PM   #237
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So in the production model, those blacked out portions of car 1 will be passenger seats?
Well I don't know but I guess so. It would look like the TC car.


source : Railers magazine
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Old April 26th, 2012, 04:35 PM   #238
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Design Drafts of KTX on Honam HSR

Korail announced KTX design drafts of Honam HSR(scheduled to open in 2014). Basically it's almost identical to KTX-Sancheon with some modification. Total 22 trainsets (220 cars) will be introduced.









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Old May 4th, 2012, 06:42 AM   #239
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I really like the yellow and blue paint schemes. Do you know if any of the modifications will help improve the reliability of the Sancheon?
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Old May 4th, 2012, 07:25 AM   #240
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I like the red paint job, if the paint was a dark blue
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