by "nFamousCJ - Keeper of Stringbean, Gengars and a Deezul" (nfamouscj)
Published 11/04/2017 at 22:24
by "nFamousCJ - Keeper of Stringbean, Gengars and a Deezul" (nfamouscj)
Published 11/04/2017 at 22:24
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STARS: 7
"Wrong Wheel Drive (41%)" (rduncan5678)
11/04/2017 at 22:51, STARS: 0
I’ve done the tunnels to towers 5k before in NYC. That one goes through the Brooklyn battery tunnel (or whatever it’s called now) and it was certainly eerie going through there with a mass of people instead of sitting in traffic in a car.
"nFamousCJ - Keeper of Stringbean, Gengars and a Deezul" (nfamouscj)
11/04/2017 at 22:56, STARS: 0
The lack of vehicles is always a daunting feeling. More so how quiet it is. To add on top of that we were testing the tide gate so one end of the tube was completely walled off - definitely intimidating
"TrustMeImAnEngineer, but I'd rather be an InternationalArtThief" (trusttheengineer)
11/04/2017 at 22:59, STARS: 0
Jet fans? Is the tunnel shorter than it looks in the picture?
"nFamousCJ - Keeper of Stringbean, Gengars and a Deezul" (nfamouscj)
11/04/2017 at 23:05, STARS: 0
Just shy of a mile. In the year of working for the company I haven’t seen them actually turned on unless by our request (when making sure the 480v they need is interfering with our radio coms).
Interestingly whenever there’s traffic the bearing system is set up so well that those huge blades are always spinning just from the passive airflow generated by traffic flow
"TrustMeImAnEngineer, but I'd rather be an InternationalArtThief" (trusttheengineer)
11/04/2017 at 23:19, STARS: 0
Most of the tunnels I’ve had experience with do similarly get most of their ventilation from the piston effect of cars moving through, and will otherwise run pretty low speed on fans, but I still just don’t trust jet fans like that to perform for fire ventilation, especially on a mile long tunnel! Do the fans run off of a VFD that interferes with the radios?
"G_Body_Man: Sponsored by the number 3" (gbodyman)
11/04/2017 at 23:20, STARS: 0
There’s a tunnel near my school roughly half a mile long that’s completely deserted at night. I know that feeling.
"nFamousCJ - Keeper of Stringbean, Gengars and a Deezul" (nfamouscj)
11/04/2017 at 23:24, STARS: 0
The old design was actually a set of velocity stacks at the entrance and exit of each tube that drew the exhaust up and out. We took those vent buildings and retrofit them into out command centers instead. Still impressive seeing the massive motors and gearing set up to drive the fans capable of drawing exhaust from tunnels.
The interference was assumed to be coming from out antenna lines running right along the power input lines of the fans. It’s been a mess dealing with multiple contactors in regards to that situation.
"nFamousCJ - Keeper of Stringbean, Gengars and a Deezul" (nfamouscj)
11/04/2017 at 23:25, STARS: 1
Eerie. A massive empty concrete tube underneath thousands of pounds of pressure all around it.
"TrustMeImAnEngineer, but I'd rather be an InternationalArtThief" (trusttheengineer)
11/05/2017 at 00:08, STARS: 1
I can definitely see that being a cause for interference! In the Eisenhower tunnel, the fans and motors are just absolutely massive, each fan has two dual speed motors in order to ramp it up to full fire mode speed, with the max being about 600hp per fan - good for 375,000 cfm or so... for each one of the 28 fans. Impressed me every time like it was my first time seeing them. Do you staff the tunnel 24/7?
"nFamousCJ - Keeper of Stringbean, Gengars and a Deezul" (nfamouscj)
11/05/2017 at 00:17, STARS: 0
That’s actually pretty valuable information. My role isn’t the fan specifically but rather the software integration and function of the fan (and everything encompassing the tunnel itself). I’ll bug my electricians Monday about the fan stats specifically and find if they’re opperating in an environment that’s creating interference with the rest of out gear
"The Crazy Kanuck; RIP Oppositelock" (jukesjukesjukes)
11/05/2017 at 00:19, STARS: 0
Must. Not. Rev. Engine.
"jimz" (jimz)
11/05/2017 at 07:31, STARS: 2
The Detroit-Windsor tunnel under the river
"G_Body_Man: Sponsored by the number 3" (gbodyman)
11/05/2017 at 16:52, STARS: 2
Is it? Or is it a well-ventilated resonated acoustic chamber for automotive noises?
"nFamousCJ - Keeper of Stringbean, Gengars and a Deezul" (nfamouscj)
11/05/2017 at 22:23, STARS: 1
Go through in a convertible with traffic and you’ll take back the well-ventilated part.
However them acoustics on point.
"G_Body_Man: Sponsored by the number 3" (gbodyman)
11/07/2017 at 00:29, STARS: 0
I’ve been through one in a Jeep with the doors and top off, and the windshield folded while trucks passed us. Compared to spray-bombing a basement, a tunnel is quite well ventilated.