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| Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) (769357) | |
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| (769362) | |
Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) |
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Posted by ClearAspect on Sun Apr 12 14:33:05 2009, in response to Question about abrupt bump/jog in Steinway Tunnel (Flushing Line), posted by trainsarefun on Sun Apr 12 14:21:41 2009. Look out the front of the train I think the tunnel shifts just a bit so the track has too, I wonder if they could've shaved the tunnel walls to straighten out the track but the trains don't go fast enough to make it of any safety concern. |
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| (769366) | |
Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) |
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Posted by trainsarefun on Sun Apr 12 14:41:44 2009, in response to Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line), posted by ClearAspect on Sun Apr 12 14:33:05 2009. Look out the front of the train I think the tunnel shifts just a bit so the track has tooIt looks like it, although it seems to be a short, sharp shift. Although it sort of begs the question of why the tunnel seems to shift. I assume that they had some good reason to do it, unless it was just an oops that once done wasn't worth correcting. I wonder if they could've shaved the tunnel walls to straighten out the track but the trains don't go fast enough to make it of any safety concern. Yes the speeds are quite low, since the incline is quite steep, and trains already reduced speed to clear the timed signals on the downgrade. |
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| (769370) | |
Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) |
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Posted by BMTLines on Sun Apr 12 14:48:55 2009, in response to Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line), posted by trainsarefun on Sun Apr 12 14:41:44 2009. I wonder if it has something to do with the original plans for the line. The Steinway tunnels were originally built for trolley cars - there was supposed to be a loop on the Queens side which I do not believe was ever built, although the tunnel was but never saw revenue trolley service. The Flushing el was simply connected to the already existing and unused trolley tunnel. |
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| (769401) | |
Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) |
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Posted by insidetransitcom on Sun Apr 12 15:50:18 2009, in response to Question about abrupt bump/jog in Steinway Tunnel (Flushing Line), posted by trainsarefun on Sun Apr 12 14:21:41 2009. i wait for it as i can count to when its coming and watch the people who aren't holding on go for a bit of a ride - i also wondered why it happens - its fun though! |
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| (769444) | |
Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) |
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Posted by R42 4787 on Sun Apr 12 17:01:47 2009, in response to Question about abrupt bump/jog in Steinway Tunnel (Flushing Line), posted by trainsarefun on Sun Apr 12 14:21:41 2009. The tunnel curves as it shifts under 50 Avenue along the street grid. It was built there as the builders of the interurban line choose 50 Avenue for the route. |
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| (769463) | |
Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) |
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Posted by randyo on Sun Apr 12 17:37:48 2009, in response to Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line), posted by BMTLines on Sun Apr 12 14:48:55 2009. If I recall my history of the Steinway Tunnels, "trolley" car service did operate in the tunnel very briefly. The reason I put "trolley" in quotes is because there was a very small number of cars (in fact I think only 2) that were specially equipped with mini pantographs similar the those on the roof of the NYCRR electric engines that operated into GCT that collected current from an overhead third rail that was secured to the roof of the tunnel. |
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| (769472) | |
Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) |
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Posted by R36 #9346 on Sun Apr 12 17:56:46 2009, in response to Question about abrupt bump/jog in Steinway Tunnel (Flushing Line), posted by trainsarefun on Sun Apr 12 14:21:41 2009. From this:Whether due to misalignment or loss of control of the shields, it has not been established, but a slight kink can be observed in the south tube, just east of shaft #3. |
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| (769485) | |
Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) |
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Posted by R160 8818 on Sun Apr 12 19:06:57 2009, in response to Question about abrupt bump/jog in Steinway Tunnel (Flushing Line), posted by trainsarefun on Sun Apr 12 14:21:41 2009. I remember reading somewhere a while ago that the Steinway tunnels were built from the opposite ends towards the middle of the East River (as opposed to building it in one direction from one starting place), and that jog in the tunnels is where the tunnels joined. Someone correct me if I'm wrong. |
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| (769497) | |
Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) |
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Posted by jabrams on Sun Apr 12 19:42:14 2009, in response to Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line), posted by insidetransitcom on Sun Apr 12 15:50:18 2009. It was mentioned either on this board, or in sub-talk, or in a Transit Museum tour, that when they were building the tunnel from both ends, when they met they were off my a couple of inches (feet), that's why the bump. |
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| (769513) | |
Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) |
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Posted by Fred G on Sun Apr 12 20:30:14 2009, in response to Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line), posted by jabrams on Sun Apr 12 19:42:14 2009. That's quite possible and probable, as I've seen that occur on projects that were aligned with much more sophisticated and precise equipment.your pal, Fred |
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| (769514) | |
Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line) |
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Posted by R42 4787 on Sun Apr 12 20:32:51 2009, in response to Re: Question about abrupt bump/jog in Steinway Tunnel (Flushing Line), posted by randyo on Sun Apr 12 17:37:48 2009. It was briefly in 1907. |
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