RE: EEs and other English model locos

[Mike Dix <mdix@mrt.tas.gov.au>]

Aus loco discussion mailing list

The pipe problem seemed to be the major impediment between the QR and TGR
locos, with the TGR going for three pipe when they converted the Z/ZA from
vacuum to air as opp[osed to the four pipe arrangement which they later
inherited on the ZB and ZC locos.

The later EE locos in Australia did not have `notched' throttles. From the
off position they went to a `minimum power notch' after which power
application was `infinitely variable up to the maximum power position'.

Michael Dix

mdix@mrt.tas.gov.au
Phone (03) 6233 8348

> -----Original Message-----
> From:	John Regan [SMTP:reganjd@clear.net.nz]
> Sent:	Tuesday, October 19, 1999 10:31 PM
> To:	Aus loco discussion mailing list
> Subject:	Re: EEs and other English model locos
> 
> Aus loco discussion mailing list
> 
> From: Mike Dix
> >The MU compatibilty problem between the TGR Z/ZA classes and QR 1300 &
> 2350
> >classes was more to do with brake systems than electrical or mechanical.
> >Although the two ZR/ZP locos were rewired they still don't seem to MU
> >properly with the GM locos, although at last reports the parts to fix
> this
> >problem had been ordered. From memory this was also a brake problem.
> 
> 
> Are the EE locos 4 pipe?  We used to operate 4 pipe EE locos in multiple
> with 3 pipe GMs here with limited success as I remember.  Another problem
> was the GMs are 8 power notch and the EE were 10 power notch so they did
> not
> gel up so well.
> 
> The 1460/1500 class we got from QR were 4 pipe and the boffins in
> Wellington
> attached a box in the cab that enabled them to be operated with 3 pipe
> locos.  The MR pipe was blanked and some other mods were done. The biggest
> hassle with them was that they often failed to release the loco brakes
> when
> the automatic brake was applied and the independant released which caused
> loads of smoke and chopped out a set of blocks every trip to Picton which
> is
> 350kms or so.
> I think these locos were converted to 3 pipe with the upgrade and
> installed
> with 26L brakes before being shipped west.
> 
> John Regan
> reganjd@clear.net.nz
> Christchurch
> NEW ZEALAND
> 
> +64 3 338 4260 (home)
> +64 21 362 143 (mobile)
> ICQ #15462976
> 
> 
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