Hi Dudley/All,
NACO wheels were manufactured in the USA - both plain "spun steel" and super-resilient wheels were offered to the trade. Penn Machine Company in Pennsylvania made super -resilient wheels; Carnegie Steel Company made super-resilient wheels. As far as I know only Penn Machine Company is in business and still manufactures super-resilient wheels for PCC cars; San Francisco and Philadelphia use Penn Machine wheels to this day. CAF in Spain manufactures a resilient wheel for European trams and what you have stated about the resilient, super-resilient and SAB wheelsis consistent with what I have studied about them over the years. If St. Louis Car Company sent B-3 trucks and control gear to Melbourne, it is not a stretch of the imagination to think that Sydney got similar information on PCC type wheels and their manufacturers.
Cheers,Tony-----Original Message-----
From: Dudley Horscroft
Sent: Sep 6, 2013 11:20 AM
To:TramsDownUnder@...
Subject: Re: [TramsDownUnder] -R1 class No.1958 with Brisbane Resilient Wheels.
Re "NACO wheels" - what are these?
So far as Google is concerned, these are wheels at a place called NACO in
Arizona. There are also alloy wheels suitable for four wheel drives - this
is the Australian version.
I can find references to three types of resilient wheels - the PCC
standard, the PCC Super Resilient, and the Bochum - of which there are several
variants. Basically it seems that the PCC wheels have rubber sandwiched
between plates so that the rubber is in torsion when there is a load on the
axle, and the Bochum wheels have rubber between tyre and hub so it is in
compression.
IIRC, the PCC resilient wheels can be identified by a large 'nut' at the
end of the axle, presumably holding the outer plate in place, and when tightened
compressing the rubber between an extension of the tyre towards the centre of
the wheel and a similar plate on the inside, while the Super Resilient can be
identified by a ring of 'nuts' around the edge of the outer plate, The
Bochum wheels can be identified by a gap between tyre and hub in which it may be
possible to see individual blocks of rubber. However, the Bochum wheels
come in four variants, BO 54, 84, 2000 and 01 - all similar, while there is a
"LORA" version which appears similar to the PCC Super Resilient.
There may be others, if so what?
See, for the Bochum wheels:
http://www.bochumer-verein.de/uk/products/resilient-wheels.html
Regards
Dudley Horscroft
----- Original Message -----
From:
Mick
Duncan
To:TramsDownUnder@...
Sent: Friday, September 06, 2013 11:59
PM
Subject: Re: [TramsDownUnder] -R1 class
No.1958 with Brisbane Resilient Wheels.
Gday Noel
Brissy used NACO wheels,and so did the
M&MTB before it built its own
resilient wheels
The NACO wheels
had a large disc like projection behind the tyre which may
well
have
fouled the high Sydney check rails as it only cleared the rail
head-road
surface by about 1"
Cheers,
Mick.
----- Original Message -----
From: "Noel Reed" noelreed10@...>
To:
TramsDownUnder@...>
Sent:
Wednesday, September 04, 2013 9:48 PM
Subject: [TramsDownUnder] -R1 class
No.1958 with Brisbane Resilient Wheels.
>
> In 1951,
two trucks as used on the later Brisbane 'FM' class trams were
> sent to
Sydney for test under an 'R1' class tram.
>
> The trucks were
fitted to 'R1' 1858 and it ran for some time on the
> Circular
>
Quay to Sydney Railway Station service via Pitt and Castereagh
Streets.
>
> They were much quieter than the regular No 13 trucks
as used on the 'R1'
> trams but there were problems encountered
with the operation of the
> wheels
> on Sydney curves which often
had high check-rails.
>
> A picture is attached of 'R1' 1858 on
the approach track to the Sydney
> Railway Colonnade terminus. Track in
this location is now for departure of
> trams on the SLR
route.
>
> For comparison, here is one of my pictures of a
Brisbane 'FM' class tram
> with resilient wheels at Cavendish Road
Terminus.
> http://tdu.to/37140.att
>
>
Noel
Reed.
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