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Old July 26th, 2010, 02:37 AM   #21
Nexis
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Quote:
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So DC approved the Right Rail plan over the purple line?
The Purple line is Maryland , and regular Light Rail , but the inner city lines with have some wireless parts.
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Old July 27th, 2010, 12:45 PM   #22
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What I really hate about tram, are those ugly wires. This system is amazing. What about tram cars with powerful batteries? No need for wires.
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Old July 27th, 2010, 06:23 PM   #23
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there commuter rail lines.
Had I written «tramway»? Up here, the tram-train concept's already been offed for years now...:yawns:...If twain go on stweet, twain must be twam!...

So! big deal if Ottawa's rolling stock amounts to some model of glorified tram...
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Old July 27th, 2010, 06:28 PM   #24
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O'Brien wasn't so stupid and stubborn
At this rate, this creed of powerbroker (O'Brien's) gonna be puzzling me for further decades.
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Old July 28th, 2010, 04:27 AM   #25
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Quote:
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What I really hate about tram, are those ugly wires. This system is amazing. What about tram cars with powerful batteries? No need for wires.
as someone earlier mentioned, the batteries last for a few minutes. wires are here to stay.
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Old July 28th, 2010, 10:46 AM   #26
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as someone earlier mentioned, the batteries last for a few minutes. wires are here to stay.
Ultracapacitors will offer better potential.

But as also said above, modern wires are almost invisible. Stanchions are the only issue (where building attachment is not possible) and even these can be integrated with streetlights etc.
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Old July 28th, 2010, 11:11 AM   #27
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Originally Posted by historyworks View Post
Ultracapacitors will offer better potential.
Yes,few thousand cycles and then...?

Quote:
Originally Posted by historyworks View Post
But as also said above, modern wires are almost invisible. Stanchions are the only issue (where building attachment is not possible) and even these can be integrated with streetlights etc.
Well, I can't agree with Ovem.I can understand that in some older parts of some cities there is a necessity of "hiding" the wires (as a compromise between the tram system and the,sometimes ancient,city centre),but why on the whole route? Wires are the element of the tram system (and of the tram's tradition and - I could even say - tram definition).
Besides when wires are attached to the well designed lamps (you know,wires stretched between two rows of XIX century-kooking-like lamps; I have seen something like that,but I don't remember where),they look really well!

Last edited by Eurotram; July 28th, 2010 at 11:22 AM.
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Old July 28th, 2010, 11:24 AM   #28
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The very first trams were "wireless":

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Old July 28th, 2010, 11:41 AM   #29
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Quote:
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The very first trams were "wireless":

I agree,but they polluted very much... not air,but streets
Later we had another type of wireless trams (eg. in Jelenia Góra/Hirschberg,they were powered with gas); they were so much unreliable that after two years they were replaced by traditional,electric trams
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Old July 28th, 2010, 12:15 PM   #30
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The power supply is installed with the track... even so, it is, as others have said, 3x more expensive than using overhead wires.



APS track under construction on Line C at place paul douner. Also seen here are some preparatory works for a tramstop.

More information, pictures and links to soundclips of the power pick-up shoes when travelling on APS can be found here...

http://citytransport.info/Bod.htm (page with small pictures)

http://citytransport.info/Boda.htm (page with large pictures - broadband users only!)

Image above and quoted website are mine.

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Last edited by spsmiler; July 28th, 2010 at 12:20 PM.
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Old July 28th, 2010, 12:32 PM   #31
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Quote:
Originally Posted by Eurotram View Post
I agree,but they polluted very much... not air,but streets
Later we had another type of wireless trams (eg. in Jelenia Góra/Hirschberg,they were powered with gas); they were so much unreliable that after two years they were replaced by traditional,electric trams
The problems here with them was that they were dangerous. In rainy weather, the rain filled the ditch where the 3rd rail was, and elelctrocuted anybody stepping onto it.
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Old July 29th, 2010, 12:57 AM   #32
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Quote:
Originally Posted by trainrover View Post
Had I written «tramway»? Up here, the tram-train concept's already been offed for years now...:yawns:...If twain go on stweet, twain must be twam!...

So! big deal if Ottawa's rolling stock amounts to some model of glorified tram...


Chicago-bound train approaches 11th Street station

Michigan City, Indiana

---
I know that that's on a road, but how is it a tram?
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Old July 31st, 2010, 04:28 AM   #33
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Quote:
Originally Posted by Eurotram View Post
Yes,few thousand cycles and then...?
I am talking about bridging the gap between wires for certain distances - not for the whole system.
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Old August 5th, 2010, 12:03 PM   #34
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Hi there!

There seems to be one more wireless system in development, called SWIMO. It's being developed by Kawasaki in Japan. It's a battery-powered tram with a nickel-metalhydrid battery from Kawasaki. Gigacell-technology, they call it. Seems to be quite a revolutionary batterypack. It can power a tram for 10 kms, but since that's not enough for many tramlines, the batterypack can be recharged at every stop in an amazing 10 seconds!

It has already been tested several times - it seems to work. The battery-pack has seen service in a Chikuho 2000-train and the SWIMO-tram itself has been tested in the Japanese city of Sapporo in 2008.

If you want to read more, here's a PDF. Unfortunately, there seems to be little more info on the net. Most of it is in Japanese...
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Old August 6th, 2010, 12:49 AM   #35
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I insist. I prefer tram without wires. Batteries might last for a few minutes. If science was forced to solve that problem, it wouldn't be a problem anymore. I mean, we've been on the moon. Can't we make batteries that last all day long? WTF
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Old August 6th, 2010, 08:20 AM   #36
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We can make batteries that last days. Proof is your cellphone. The catch is the relative size of the battery. Trams would need to carry several tonnes of extra weight in the form of batteries in that case.
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Old August 6th, 2010, 03:00 PM   #37
ovem
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Well a few more tons won't be a problem :P
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Old August 6th, 2010, 07:58 PM   #38
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Quote:
Originally Posted by ovem View Post
Well a few more tons won't be a problem :P
Its more like 20%-30% of total weight.
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Old August 7th, 2010, 07:35 PM   #39
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We are still struggling with the energy density of batteries, sure we can have a battery that lasts days but only when a small amount of power is being drawn. When serious power is being drawn either you have to build them very large (like submarine batteries) or to charge them very frequently, but then you get into another problem that of finite charges and discharges before deterioration of max capacity and charge life begins.

Thats why recently the trend has been into micro-generation e.g. fuel cells or denser storage such as flywheels has occured.
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Old August 9th, 2010, 12:46 AM   #40
Wilhem275
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The crappy Translohr system applied in Padua has a stretch running along historic buildings, so it runs on batteries.

A big con is that Lohr guarantees the batteries only up to 3-cars vehicles, so we had not only to buy this crap, but also to use short trams






Some bad movies from my old camera...

http://www.youtube.com/watch?v=z9SdTn92PQQ

http://www.youtube.com/watch?v=PR_jZR7_LJ8
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