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- From: mckenney@cims.nyu.edu (Alan McKenney)
- Newsgroups: rec.railroad
- Subject: Re: Report on exhibition of prototype NYC Subway trains
- Summary: These high-tech cars sound like a maintainence nightmare
- Keywords: subway, NYC
- Message-ID: <Bzz6xB.GqE@cmcl2.nyu.edu>
- Date: 28 Dec 92 15:27:10 GMT
- References: <JMD.92Dec24143135@lion.bear.com>
- Sender: notes@cmcl2.nyu.edu (Notes Person)
- Followup-To: rec.railroad
- Distribution: usa
- Organization: Courant Institute, NYU, NY, NY, USA
- Lines: 86
- Originator: mckenney@gauss.cims.nyu.edu
- Nntp-Posting-Host: gauss.cims.nyu.edu
-
- In article <JMD.92Dec24143135@lion.bear.com> jmd@bear.com (Josh Diamond) writes:
-
- >Last weekend the NYCTA had both of the New Technology trains (R-110a
- >and R-110b) on display ...
-
- >... both are permanently coupled trainsets --
- >the R-110a [IRT] having a minimum length of 5 cars, and the
- >R110b [IND/BMT] having a minimum length of 3 cars.
-
- (1) Does "permanently coupled" mean that the cars share equipment?
- If so, this means less redundancy than with the present
- equipment. (A complaint about the "slope-front" car-sets
- was that they had only one compressor, so if it went, the
- train was stuck. Combine this with the TA's idea of
- maintainence ...)
-
- (2) 5-car trainsets make sense on the IRT -- the platforms take
- 10-car trains. Why 3-car trainsets on the IND/BMT? The
- platforms there take 8-car trains.
-
- ...
- >Some new features are common to both trains:
- >
- >1) Computerized traction and braking control -- a single lever
- >controls both acceleration and braking.
-
- >2) AC Traction Motors controlled using choppers.
-
- >3) Battery powered operation. Power from the third rail is used to
- >charge batteries, ...
-
- >4) Air bag suspension. Compressors are used to inflate air bladders
- >which are used instead of springs. A computer ...
-
- As someone who has ridden the NYC subways for over 11 years
- now, all this high-tech stuff (including mention of a CRT
- monitor for all manner of things) makes me a little nervous.
- What makes anyone think that the TA is capable of keeping all
- this high-tech stuff working?
-
- About 10 years ago, when the R-40's (? with the cab all the
- way across) were the latest thing, I noticed that the cabs
- have speedometers, but they didn't seem to work. A motorman
- told me that the shops never fixed them, so *no* R-40 has
- a working speedometer. Newer trains don't have them at all.
- (And the newer cabs look just like the cabs on the oldest
- trains I have seen in service.)
-
- Generally, the TA seems unwilling to fix anything until it is
- so broken it just won't run any more. For example, I once
- read (the NY Times, if you can trust them) that trains are
- not taken out of service as long as at least 8 (or is it 7?)
- cars (for a 10-car train) have working motors.
-
- My own experience with high-tech stuff (e.g., cameras) suggests
- that it is more delicate and has less benign failure modes (esp.
- when abused) than more old-fashioned stuff. I fear that the
- high level of abuse and poor-to-nonexistent maintainance will
- turn these new trains into ``turkeys'' (cf. the Grumman Busses
- in NYC.)
-
-
- >5) Passenger alarm system. A pressure sensitive tape switch is
- >mounted throughout the interior of each car. When pressed, the
- >operator is notified, and a light on the outside of the car comes on,
- >alerting police as to in which car the emergency exists. (this has
- >already been installed in some cars on the J line).
-
- How well does this work? I can imagine problems with abuse.
-
- >6) Door motors are now electronically controlled and use worm drive as
- >opposed to the older lever style actuators. It is now impossible to
- >force a door open once it is closed.
-
- This sounds like a technical fix to a non-technical problem.
- The problem is not people pulling doors open (I've never seen
- that) but people holding the doors, either voluntarily (e.g.,
- so the conductor will open them again) or involuntarily (bags,
- body parts, etc., stuck in the door.) Unblockable doors may
- discourage voluntary door-holding (especially after a few
- people have been maimed or killed), but won't prevent involuntary
- door-holding. I predict an upsurge in ``dragging incidents''.
-
- --
- Alan McKenney E-mail: mckenney@cims.nyu.edu (INTERNET)
- Courant Institute,NYU,USA ...!cmcl2!cims.nyu.edu!mckenney (UUCP)
-