[Archive] Questions on MRT/LRT

• Din89

  27 Dec 09, 12:51

  I've a question to ask..When de train(NSL/EWL) is in AM mode,does de TO needs to control the train when moving off or stop de train??

• Interception_7

  27 Dec 09, 12:55

  AM mode? I presume it's Auto mode.

  The answer is no. They don't have to control the train when moving off and stopping it. It's all computerised. The TOs job are to open and close the doors and also take note of instructions given by the OCC or the station masters.

  The only time when they will have to control the train is when, they are asked to drive in CM mode(Coded Manual mode) or in RM mode(Restricted Manual mode).

• Din89

  27 Dec 09, 13:35

  Oh..thnks for the info..Here another question:What is that large LCD monitor located at the left of the driver's cabin??

• Interception_7

  27 Dec 09, 13:45

  Originally posted by Din89:

  Oh..thnks for the info..Here another question:What is that large LCD monitor located at the left of the driver's cabin??

  That LCD monitor will connect itself via infrared waves to the CCTV that are available at the station platform.

  They use the monitor to see if it's safe for them to close the doors.

• youyuan

  29 Dec 09, 01:08

  http://www.youtube.com/watch?v=d7UNCFVSukc&feature=player_embedded why is it making so much werid noise when travelling. wat is happening?

• BiminiRosy

  31 Dec 09, 15:19

  Why when C751B arriving or stopping (arrive station) the sound in the front (driver cabin) the sound meaning?

• Interception_7

  31 Dec 09, 15:28

  Originally posted by BiminiRosy:

  Why when C751B arriving or stopping (arrive station) the sound in the front (driver cabin) the sound meaning?

  I couldn't catch to what you are saying?

• BiminiRosy

  31 Dec 09, 17:31

  Originally posted by Interception_7:

  I couldn't catch to what you are saying?

  I mean C751B when arriving the station, some sound "di.... (hold)" at infront the train cabin. Still did not catch? See here: http://www.youtube.com/watch?v=_hKwo69Hgaw

  Time: 1:42 to 1:59hr

• Bus and Train LoVuR

  31 Dec 09, 19:36

  How does the flat wheel become round again?

• wenjie639

  31 Dec 09, 19:44

  Originally posted by Bus and Train LoVuR:

  How does the flat wheel become round again?

  The wheel is replaced.

• Interception_7

  31 Dec 09, 21:59

  Originally posted by BiminiRosy:

  I mean C751B when arriving the station, some sound "di.... (hold)" at infront the train cabin. Still did not catch? See here: http://www.youtube.com/watch?v=_hKwo69Hgaw

  Time: 1:42 to 1:59hr

  I think traction motor? Like from lowest gear to highest gear for accelerate, highest to lowest to decelarate.. Somewhat like auto transmission cars, the dropped from gear 4 - 3 - 2 - 1.. Not too sure..

• BiminiRosy

  31 Dec 09, 22:00

  2 more hours left to NEW YEAR!

• Interception_7

  31 Dec 09, 22:04

  Originally posted by wenjie639:

  The wheel is replaced.

  Not necessarily..

  They will go for wheel profiling..

• Samuel Lee

  31 Dec 09, 22:05

  Originally posted by Interception_7:

  Not necessarily..

  They will go for wheel profiling..

  Then how much time can a wheel be profiled?

• Interception_7

  31 Dec 09, 22:07

  Originally posted by Samuel Lee:

  Then how much time can a wheel be profiled?

  Not too sure though..

  Ok hold on, I wheel research abt this.. Will get back to both Samuel Lee and also BiminiRosy

• youyuan

  31 Dec 09, 23:50

  happy new year to everybody 2010 will be a great year.

• Interception_7

  1 Jan 10, 16:31

  Originally posted by Interception_7:

  Not too sure though..

  Ok hold on, I wheel research abt this.. Will get back to both Samuel Lee and also BiminiRosy

  Alright... Got the answer for it..

  like what wenjie639 said, the wheels will be replaced, BUT under some circumstances..

  the wheels of 850mm in diameter whennew, it can be re-profiled to get rid of the flat side, to a minimum diameter of 780mm.. once it reaches 780mm or less due to major fatigue, only then the wheels are replaced..

• Samuel Lee

  1 Jan 10, 17:01

  Originally posted by Interception_7:

  Alright... Got the answer for it..

  like what wenjie639 said, the wheels will be replaced, BUT under some circumstances..

  the wheels of 850mm in diameter whennew, it can be re-profiled to get rid of the flat side, to a minimum diameter of 780mm.. once it reaches 780mm or less due to major fatigue, only then the wheels are replaced..

  Wow, just curious, how to determine a train got flat wheel? (And how dangerous can it be to board a train with a flat wheel that has less than 780mm, due to lack of maintenance.)

• willis_chong

  1 Jan 10, 17:23

  Originally posted by Samuel Lee:

  Wow, just curious, how to determine a train got flat wheel? (And how dangerous can it be to board a train with a flat wheel that has less than 780mm, due to lack of maintenance.)

  Hear the boom boom boom sound when the train moves.

• NickL_C151

  1 Jan 10, 17:36

  Originally posted by Samuel Lee:

  ... how dangerous can it be to board a train with a flat wheel that has less than 780mm, due to lack of maintenance.

  The wheel would be too small, thus it will make more rotations when it's travelling as compared to a brand new wheel at 850mm diameter. When too much force is applied on the smaller wheel, the grooves at the side of the bogie may crack. Once it cracks and chips off, and a big-enough gap is formed, there is almost nothing to hold the bogie onto the track, thus causing the train to derail towards the direction of the chipped groove.

• NickL_C151

  1 Jan 10, 17:37

  [double post]

• Interception_7

  1 Jan 10, 17:37

  then later,

  huat ar! derailment!!

• NickL_C151

  1 Jan 10, 17:42

  Oh, to add on, wheel profiling may also be known as wheel grinding or wheel latheing.

• Samuel Lee

  1 Jan 10, 17:51

  Originally posted by NickL_C151:

  Oh, to add on, wheel profiling may also be known as wheel grinding.

  So when it gets profiled too much, the wheel will be getting smaller and smaller and must replace or else it will derailed?

• nganmatthias

  1 Jan 10, 20:19

  Originally posted by Interception_7:

  then later,

  huat ar! derailment!!

  
  To make matters worse the drivers are driving very fast nowadays.