[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: [Ausloco] And the 422,s.
Hi Matthew: what you say is quite correct and which I was alluding to without the detail hence my use of 'relatively' in describing the simpler repairs. This happened quite frequently in steam days - some classes were notorious for cracking frames, particularly from the horncheek corners. Even the cast steel AD60 garratt frames weren't immune from cracking.
Melanie Dennis
Australian Steam Group
-----Original Message-----
From: Matthew Grass [SMTP:matthew_grass@yahoo.com.au]
Sent: Friday, 12 May, 2000 12:59 PM
To: Ausloco@egroups.com
Subject: RE: [Ausloco] And the 422,s.
Hi
Repairing a loco frame is just not that simple. It
depends on the nature of the fracture and the type of
material used in the frames construction. Engineers
need to be consulted to ensure that correct procedure
is followed. Quite often welding produces secondary
hardening in the weld zone meaning that in the future
the frame could fail extremely rapidly with no
warning.
With proper precautions, a sucessful repair could be
made but economic factors may be important in this
case. However if repaired the frame may still fell the
accelerated effects of fatigue causing more cracking.
An example of this is X35, rolled at Glenorchy approx
1970, repaired and in traffic until approx 1995.
Withdrawn again to due fatigue cracking of the frame.
Although ASR wouldn't expect this long in service I
hope.
Hope this is of interest to some of you.
Matthew Grass
--- "Melanie J. Dennis" <meld.asg@netspeed.com.au>
wrote: > Whether 42205 becomes a donor or a surgery
patient
> depends on the extent of the frame deterioration and
> the locos's overall condition. A simple fracture is
> 'relatively' easy to grind out and re-weld but if
> the frame is extensively fatigued, then it's
> probably 'goodnight from him'.
>
> Melanie Dennis
> Australian Steam Group
[Non-text portions of this message have been removed]
------------------------------------------------------------------------
Life's too short to send boring email. Let SuperSig come to the rescue.
http://click.egroups.com/1/3805/7/_/_/_/958358449/
------------------------------------------------------------------------
To unsubscribe from this group, send an email to:
Ausloco-unsubscribe@egroups.com