Re: Loco cab safety

[mauried@commslab.gov.au (Maurie Daly)]

In article <8226b1$ftr$1@news1.mpx.com.au> "Dave Proctor" <daproc@spambait.umpires.com> writes:
>From: "Dave Proctor" <daproc@spambait.umpires.com>
>Subject: Re: Loco cab safety
>Date: Wed, 1 Dec 1999 14:51:48 +1100

>Maurie Daly <mauried@commslab.gov.au> wrote in message
>mauried.486.38449890@commslab.gov.au">news:mauried.486.38449890@commslab.gov.au...

>> For what its worth, just recently since the hot weather has started, there
>> seems to be a marked increase in the failure rate of the 2nd unit on NR
>trains
>> between Goulburn & Harden, usually on the 1:40 grades near Bowning or
>Jerrawa.
>> What seemed odd was that it was always usually the no 2 unit , not the
>leading
>> one.
>> Just about all NR trains on this corridor have 2 NRs or more.
>> Is there any obvious reason why its more likely that a 2nd unit will fail
>in > preferance to the lead unit?

>Only thing that I can think of (and I am untrained) is maybe the airflow
>characteristics are causing the units to overheat and fail? Being second
>units, the leading unit *could* be interfering with the the airflow to them.
>Do you know if it does it to a third unit? (Not that there would be many
>triple-NR's running on that corridor).

>--
>DaveProctor
>thadocta AT dingoblue.net.au


Yes , there arnt that many trains with 3 NRs on them .
I wondered whether it had something to do with the level of fault reporting 
between locos , ie in the lead cab do you get many indications of potential 
faults on the trailing units before total shutdown occurrs.
To be fair , whatever is killing the rear units it doesnt seem to be fatal, in 
that usually after stopping for  a while , the crew is able to get the rear 
unit running again, so overheating could be likely .
Where are the radiator exhaust fans in an NR ?, its not obvious from looking 
at the roof.

MD