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| Damaged wire causes brake malfunction,BART new train test (1394014) | |
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| (1394014) | |
Damaged wire causes brake malfunction,BART new train test |
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Posted by TransitChuckG on Sat Apr 30 09:23:43 2016 Bart new train test crash |
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Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by SelkirkTMO on Sat Apr 30 12:01:52 2016, in response to Damaged wire causes brake malfunction,BART new train test, posted by TransitChuckG on Sat Apr 30 09:23:43 2016. Brake fluid? LOL! |
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Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by Jace on Sat Apr 30 15:07:21 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by SelkirkTMO on Sat Apr 30 12:01:52 2016. They have hydraulic brakes. |
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| (1394055) | |
Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by SelkirkTMO on Sat Apr 30 17:29:56 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by Jace on Sat Apr 30 15:07:21 2016. Really? Wow. |
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Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by randyo on Sat Apr 30 19:28:41 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by SelkirkTMO on Sat Apr 30 17:29:56 2016. I believe, the original brake package on the WMATA care was also hydraulic and one experimental train of MTA R-44s also had hydraulic brakes. The failure cited indicates to me that a hydraulic brake system isn’t as safe as an electro pneumatic since in the even of a similar failure with air brakes, the air in the auxiliary reservoir would be able to enter the brake cylinders without having to be pumped by an outside source as is the case with hydraulic brakes. |
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| (1394077) | |
Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by nasadowsk on Sat Apr 30 20:13:33 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by randyo on Sat Apr 30 19:28:41 2016. I don't even understand why this is the case, other than shitty design. Hell, my friend's deuce and a half has (sort of) air over hydraulic braking. Actually more like air assisted, but anyway, there's no reason a hydraulic brake should need a constant pumping and all to work - that's what accumulators are for. |
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Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by Steamdriven on Sat Apr 30 20:31:06 2016, in response to Damaged wire causes brake malfunction,BART new train test, posted by TransitChuckG on Sat Apr 30 09:23:43 2016. Do the fool things not have a hydraulic reservoir? |
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| (1394089) | |
Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by Terrapin Station on Sat Apr 30 21:27:40 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by Jace on Sat Apr 30 15:07:21 2016. OWNED!!!! Selkook got OWNED!!!!!! |
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| (1394097) | |
Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by SelkirkTMO on Sat Apr 30 23:14:38 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by randyo on Sat Apr 30 19:28:41 2016. Unless of course the compressors stopped feeding it miles ago. :) |
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| (1394099) | |
Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by Jace on Sat Apr 30 23:24:54 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by nasadowsk on Sat Apr 30 20:13:33 2016. This has nothing to do with design, the car had a special rig for testing/training purposes. Someone kinked/shorted one of the rigged up wires laying inside the car which knocked out the APS and in the turn the pump. Once the accumulator was drained they had no brakes putting them into the kitty litter. Normally there would be dynamics until 5 mph, I don't know if they were functioning or not in this case.Hydraulics have been standard equipment on BART all along and are also used on most LRVs these days so it's not some sort of unproven technology. BART cars are among the lightest anywhere (100,000 pound maximum civil load if I recall) so they have all kinds of features to keep the weight down, hydraulic brakes being just one of them. Just guessing here - their concerns about weight may have caused them to minimize the size of the accumulator and instead rely more on the dynamics. |
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| (1394101) | |
Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by The Silence on Sat Apr 30 23:39:02 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by nasadowsk on Sat Apr 30 20:13:33 2016. "Ve at Bombardier are offended. In the great French tradition we try to emulate wizout actually being from la France, we work hard to be, how you say, ze shittiest around. being "le pire absolu" takes time, Monsieur."And before I hear any bitching; I'm part French, I get to make these jokes. |
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Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by TerrApin Station on Sun May 1 00:04:59 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by The Silence on Sat Apr 30 23:39:02 2016. Lol a French whore |
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Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by The silence on Sun May 1 11:13:56 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by TerrApin Station on Sun May 1 00:04:59 2016. Go eat a ham and cheese sandwich on a Saturday... |
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Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by TUNNELRAT on Sun May 1 11:22:51 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by The Silence on Sat Apr 30 23:39:02 2016. what part? |
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Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by randyo on Sun May 1 17:52:53 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by Steamdriven on Sat Apr 30 20:31:06 2016. From what the article said, they do but unlike an air reservoir it seems that some sort of pump is required to get the hydraulic fluid to the brake cylinder. |
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| (1394190) | |
Re: Damaged wire causes brake malfunction,BART new train test |
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Posted by Terrapin Station on Sun May 1 20:35:57 2016, in response to Re: Damaged wire causes brake malfunction,BART new train test, posted by The silence on Sun May 1 11:13:56 2016. Go eat a ham and cheese sandwich on a Saturday...You're an anti-semite. |
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